-
question_answer1)
As compared to potassium, sodium has [MP PMT 1985]
A)
Lower electronegativity done
clear
B)
Higher ionization potential done
clear
C)
Greater atomic radius done
clear
D)
Lower melting point done
clear
View Solution play_arrow
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question_answer2)
Potassium is kept in [CPMT 1976]
A)
Alcohol done
clear
B)
Water done
clear
C)
Kerosene done
clear
D)
Liquid ammonia done
clear
View Solution play_arrow
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question_answer3)
The product obtained on fusion of \[BaS{{O}_{4}}\] and \[N{{a}_{2}}C{{O}_{3}}\] is [AFMC 2005]
A)
\[BaC{{O}_{3}}\] done
clear
B)
BaO done
clear
C)
\[Ba{{(OH)}_{2}}\] done
clear
D)
\[BaHS{{O}_{4}}\] done
clear
View Solution play_arrow
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question_answer4)
Which of the following statement is correct regarding alkali metals [NCERT 1981]
A)
Cation is less stable than the atom done
clear
B)
Cation is smaller than the atom done
clear
C)
Size of cation and atom is the same done
clear
D)
Cation is greater in size than the atom done
clear
View Solution play_arrow
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question_answer5)
Valency electrons in alkali metals are [CPMT 1972]
A)
1 done
clear
B)
7 done
clear
C)
4 done
clear
D)
2 done
clear
View Solution play_arrow
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question_answer6)
Magnitude of which of the following property of alkali metals increases with the increase of atomic number [MP PMT 1987]
A)
Electronegativity done
clear
B)
Ionic radius done
clear
C)
First ionization energy done
clear
D)
Melting point done
clear
View Solution play_arrow
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question_answer7)
As compared to lithium, sodium reacts quickly with water because [NCERT 1978, 80]
A)
Its molecular weight is less done
clear
B)
It is stronger electronegative done
clear
C)
It is stronger electropositive done
clear
D)
It is a metal done
clear
View Solution play_arrow
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question_answer8)
Which is an ore of potassium [DPMT 1984; CPMT 1986; Kurukshetra CEE 1998]
A)
Carnellite done
clear
B)
Cryolite done
clear
C)
Bauxite done
clear
D)
Dolomite done
clear
View Solution play_arrow
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question_answer9)
\[N{{a}_{2}}C{{O}_{3}}\] can be manufactured by Solvey's process but \[{{K}_{2}}C{{O}_{3}}\] cannot be prepared because [MP PMT 1993]
A)
\[{{K}_{2}}C{{O}_{3}}\] is more soluble done
clear
B)
\[{{K}_{2}}C{{O}_{3}}\] is less soluble done
clear
C)
\[KHC{{O}_{3}}\] is more soluble than \[NaHC{{O}_{3}}\] done
clear
D)
\[KHC{{O}_{3}}\] is less soluble than \[NaHC{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer10)
Which of the following alkali metals is smallest in size [CPMT 1990]
A)
\[Rb\] done
clear
B)
\[K\] done
clear
C)
\[Na\] done
clear
D)
\[Li\] done
clear
View Solution play_arrow
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question_answer11)
When potassium dichromate crystal are heated with conc. HCl [DCE 1999]
A)
\[{{O}_{2}}\] is evolved done
clear
B)
Chromyl chloride vapours are evolved done
clear
C)
\[C{{l}_{2}}\] is evolved done
clear
D)
No reaction takes place done
clear
View Solution play_arrow
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question_answer12)
Which of the following does not illustrate the anomalous properties of lithium [MP PET 1993]
A)
The melting point and boiling point of \[Li\] are comparatively high done
clear
B)
\[Li\] is much softer than the other group I metals done
clear
C)
\[Li\] forms a nitride \[L{{i}_{3}}N\] unlike group I metals done
clear
D)
The ion of \[Li\] and its compounds are more heavily hydrated than those of the rest of the group done
clear
View Solution play_arrow
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question_answer13)
Correct order of increasing activity is
A)
\[Cu,\] \[Mg,\] \[Na\] done
clear
B)
\[Na,\] \[Mg,\] \[Cu\] done
clear
C)
\[Mg,\] \[Na,\] \[Cu\] done
clear
D)
\[Cu,\] \[Na,\] \[Mg\] done
clear
View Solution play_arrow
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question_answer14)
On heating anhydrous \[N{{a}_{2}}C{{O}_{3}}\], ........ is evolved [CPMT 1971, 79]
A)
\[C{{O}_{2}}\] done
clear
B)
Water vapour done
clear
C)
\[CO\] done
clear
D)
No gas done
clear
View Solution play_arrow
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question_answer15)
Chile saltpetre is [DPMT 1984; CPMT 1986, 89; CET Pune 1998; MP PMT 2003]
A)
\[NaN{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
C)
\[KN{{O}_{3}}\] done
clear
D)
\[N{{a}_{2}}S{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer16)
A mixture of \[KCl\] and \[KF\] is added to sodium chloride
A)
To increase the conductivity of \[NaCl\] done
clear
B)
To decrease the melting point of \[NaCl\] done
clear
C)
To supress the degree of dissociation of \[NaCl\] done
clear
D)
To decrease the volatility of \[NaCl\] done
clear
View Solution play_arrow
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question_answer17)
A well known reagent which contains copper sulphate, sodium potassium tarterate and sodium hydroxide is
A)
Fenton's reagent done
clear
B)
Schiff's reagent done
clear
C)
Fehling's solution done
clear
D)
Nessler's reagent done
clear
View Solution play_arrow
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question_answer18)
Sodium metal can be stored under [CPMT 1972, 85; BHU 1983]
A)
Benzene done
clear
B)
Kerosene done
clear
C)
Alcohol done
clear
D)
Toluene done
clear
View Solution play_arrow
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question_answer19)
The most dangerous method of preparing hydrogen would be by the action of \[HCl\] and [JIPMER 2000]
A)
\[Al\] done
clear
B)
\[K\] done
clear
C)
\[Fe\] done
clear
D)
\[Zn\] done
clear
View Solution play_arrow
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question_answer20)
Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point [AIEEE 2005]
A)
LiCl done
clear
B)
NaCl done
clear
C)
KCl done
clear
D)
RbCl done
clear
View Solution play_arrow
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question_answer21)
The correct formula of hypo is
A)
\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.5{{H}_{2}}O\] done
clear
B)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
C)
\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.4{{H}_{2}}O\] done
clear
D)
\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.3{{H}_{2}}O\] done
clear
View Solution play_arrow
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question_answer22)
The reagent commonly used to determine hardness of water titrimetrically is [AIIMS 2003]
A)
Oxalic acid done
clear
B)
Disodium salt of EDTA done
clear
C)
Sodium citrate done
clear
D)
Sodium thiosulphate done
clear
View Solution play_arrow
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question_answer23)
\[{{K}_{2}}C{{S}_{3}}\] can be called potassium [CPMT 1972, 74]
A)
Thiocyanate done
clear
B)
Thiocarbonate done
clear
C)
Thiocarbide done
clear
D)
Sulphocyanide done
clear
View Solution play_arrow
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question_answer24)
Which is most basic in character [BHU 1982]
A)
\[RbOH\] done
clear
B)
\[KOH\] done
clear
C)
\[NaOH\] done
clear
D)
\[LiOH\] done
clear
View Solution play_arrow
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question_answer25)
When washing soda is heated [AFMC 2005]
A)
CO is released done
clear
B)
\[CO+C{{O}_{2}}\] is released done
clear
C)
\[C{{O}_{2}}\] is released done
clear
D)
Water vapour is released done
clear
View Solution play_arrow
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question_answer26)
Which of the following is correct [CPMT 1971]
A)
All carbonates are soluble in water done
clear
B)
Carbonates of \[Na,\] \[K\] and \[N{{H}_{4}}\] are soluble in water done
clear
C)
Carbonates of \[Ca,\] \[Sr,\] \[Ba\] are soluble in water done
clear
D)
All carbonates are insoluble done
clear
View Solution play_arrow
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question_answer27)
Nitre is [CPMT 1986]
A)
\[AgN{{O}_{3}}\] done
clear
B)
\[KN{{O}_{3}}\] done
clear
C)
\[N{{H}_{4}}N{{O}_{3}}\] done
clear
D)
\[NaN{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer28)
Nelson cell is used for the preparation of [CPMT 1985]
A)
Slaked lime done
clear
B)
Baryta done
clear
C)
Sodium done
clear
D)
Caustic soda done
clear
View Solution play_arrow
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question_answer29)
Potash alum is a [CPMT 1986; MNR 1981]
A)
Complex salt done
clear
B)
Acid salt done
clear
C)
Double salt done
clear
D)
Normal salt done
clear
View Solution play_arrow
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question_answer30)
The process of industrial manufacturing of sodium carbonate is known as [CPMT 1978, 86; MP PMT 1995]
A)
Castner process done
clear
B)
Haber's process done
clear
C)
Le-blanc process done
clear
D)
Chamber process done
clear
View Solution play_arrow
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question_answer31)
The colour of hydrogen is [IIT 1980]
A)
Black done
clear
B)
Yellow done
clear
C)
Orange done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer32)
Which one of the following salts gives aqueous solution which is weakly basic [Bihar CEE 1995]
A)
\[NaHC{{O}_{3}}\] done
clear
B)
\[NaHS{{O}_{4}}\] done
clear
C)
\[NaCl\] done
clear
D)
\[N{{H}_{4}}HC{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer33)
An example for a double salt is [KCET 2002]
A)
Silver nitrate done
clear
B)
Mohr's salt done
clear
C)
Potassium ferricyanide done
clear
D)
Cupromonium sulphate done
clear
View Solution play_arrow
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question_answer34)
The elements of group IA provide a colour to the flame of Bunson burner due to [AIIMS 1987]
A)
Low ionization potential done
clear
B)
Low melting point done
clear
C)
Softness done
clear
D)
Presence of one electron in the outermost orbit done
clear
View Solution play_arrow
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question_answer35)
Which of the following is the smallest cation [MP PMT 1993]
A)
\[N{{a}^{+}}\] done
clear
B)
\[M{{g}^{+2}}\] done
clear
C)
\[C{{a}^{+2}}\] done
clear
D)
\[A{{l}^{+3}}\] done
clear
View Solution play_arrow
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question_answer36)
\[K,\] \[Ca\] and \[Li\] metals may be arranged in the decreasing order of their standard electrode potentials as [CPMT 1990]
A)
\[K,\] \[Ca,\] \[Li\] done
clear
B)
\[Li,\] \[K,\] \[Ca\] done
clear
C)
\[Li,\] \[Ca,\] \[K\] done
clear
D)
\[Ca,\] \[Li,\] \[K\] done
clear
View Solution play_arrow
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question_answer37)
Alkali metals lose electrons in [CBSE PMT 1990]
A)
s-orbitals done
clear
B)
p-orbitals done
clear
C)
d-orbitals done
clear
D)
f-orbitals done
clear
View Solution play_arrow
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question_answer38)
The alkali metal that reacts with nitrogen directly to form nitride is [Roorkee 1992; MP PMT 2000; BHU 2000]
A)
\[Li\] done
clear
B)
\[Na\] done
clear
C)
\[K\] done
clear
D)
\[Rb\] done
clear
View Solution play_arrow
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question_answer39)
Which of the following has density greater than water [MP PET 1994]
A)
\[Li\] done
clear
B)
\[Na\] done
clear
C)
\[K\] done
clear
D)
\[Rb\] done
clear
View Solution play_arrow
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question_answer40)
The reactivity of the alkali metal sodium with water, is made use of [MP PMT 1994]
A)
In drying of alcohols done
clear
B)
In drying of benzene done
clear
C)
In drying of ammonia solution done
clear
D)
As a general drying agent done
clear
View Solution play_arrow
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question_answer41)
Which of the following has smaller size [RPET 2003]
A)
\[H\] done
clear
B)
\[H{{e}^{+}}\] done
clear
C)
\[_{1}{{H}^{2}}\] done
clear
D)
\[L{{i}^{2+}}\] done
clear
View Solution play_arrow
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question_answer42)
\[KF\] combines with \[HF\] to form \[KH{{F}_{2}}\]. The compound contains the species [IIT 1996]
A)
\[{{K}^{+}},\] \[{{F}^{-}}\] and \[{{H}^{+}}\] done
clear
B)
\[{{K}^{+}},\] \[{{F}^{-}}\] and \[HF\] done
clear
C)
\[{{K}^{+}}\] and \[{{\left[ H{{F}_{2}} \right]}^{-}}\] done
clear
D)
\[{{\left[ KHF \right]}^{+}}\] and \[{{F}^{-}}\] done
clear
View Solution play_arrow
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question_answer43)
Which alkali metal is most metallic in character [MH CET 2001]
A)
K done
clear
B)
Cs done
clear
C)
Na done
clear
D)
Li done
clear
View Solution play_arrow
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question_answer44)
The property of hydrogen which distinguishes it from other alkali metals is [MP PET 1996]
A)
Its electropositive character done
clear
B)
Its affinity for non-metals done
clear
C)
Its reducing character done
clear
D)
Its non-metallic character done
clear
View Solution play_arrow
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question_answer45)
Which of the following reacts with water with high rate [AFMC 1995]
A)
\[Li\] done
clear
B)
\[K\] done
clear
C)
\[Na\] done
clear
D)
\[Rb\] done
clear
View Solution play_arrow
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question_answer46)
The valence shell electronic configuration of alkali metals is [MP PET 1996; UPSEAT 2001]
A)
\[n{{s}^{2}}n{{p}^{1}}\] done
clear
B)
\[n{{s}^{1}}\] done
clear
C)
\[(n-1){{p}^{6}}n{{s}^{2}}\] done
clear
D)
\[(n-1){{d}^{2}}n{{s}^{2}}\] done
clear
View Solution play_arrow
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question_answer47)
Alkali metals are [MP PMT 1996]
A)
Li, Na, Be, Mg, Cs done
clear
B)
Li, Na, K, Rb, Cs done
clear
C)
Na, K, Mg, Ca, Rb done
clear
D)
K, Rb, Cs, Ba, Sr done
clear
View Solution play_arrow
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question_answer48)
The atomic number of an element is 11. Its oxide will be [MP PMT 1996]
A)
Acidic done
clear
B)
Basic done
clear
C)
Acid and basic both done
clear
D)
Neutral done
clear
View Solution play_arrow
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question_answer49)
The commercial production of sodium carbonate is done by [CPMT 1982; MP PMT 1996]
A)
Lead-chamber process done
clear
B)
Haber's process done
clear
C)
Solvay's process done
clear
D)
Castner's process done
clear
View Solution play_arrow
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question_answer50)
Alkali metals are strong reducing because
A)
These are monovalent done
clear
B)
Their ionisation potential are very high done
clear
C)
Their standard electrode potential are very much negative done
clear
D)
These are metals done
clear
View Solution play_arrow
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question_answer51)
Which of the following statement about LiCl and \[NaCl\] is correct [Kurukshetra CEE 2002]
A)
LiCl has higher melting point than NaCl done
clear
B)
LiCl dissolves in water whereas NaCl does not done
clear
C)
LiCl would ionize in water more than NaCl done
clear
D)
Fused LiCl would be less conducting than fused NaCl done
clear
View Solution play_arrow
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question_answer52)
In the Castner?s process for the extraction of sodium, the anode is made of.......metal. [EAMCET 2003]
A)
Copper done
clear
B)
Iron done
clear
C)
Sodium done
clear
D)
Nickel done
clear
View Solution play_arrow
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question_answer53)
Which of the following s-block elements forms nitride [RPET 2003]
A)
Ba done
clear
B)
\[Be\] done
clear
C)
\[Ca\] done
clear
D)
\[Li\] done
clear
View Solution play_arrow
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question_answer54)
Tincal is [Pb. PMT 2001]
A)
\[N{{a}_{2}}C{{O}_{3}}.\,10{{H}_{2}}O\] done
clear
B)
\[NaN{{O}_{3}}\] done
clear
C)
\[NaCl\] done
clear
D)
\[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.10{{H}_{2}}O\] done
clear
View Solution play_arrow
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question_answer55)
Which has minimum solubility [BHU 2003]
A)
\[B{{r}_{2}}{{S}_{3}}\] done
clear
B)
\[A{{g}_{2}}S\] done
clear
C)
CoS done
clear
D)
PbS done
clear
View Solution play_arrow
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question_answer56)
Cryolite helps in [BHU 2003]
A)
Lowering the melting point done
clear
B)
Increasing the melting point done
clear
C)
Increasing the electrical conductivity done
clear
D)
Decreasing the electrical conductivity done
clear
View Solution play_arrow
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question_answer57)
In certain matters lithium differs from other alkali metals, the main reason for this is [MP PET/PMT 1998]
A)
Small size of Li atom and \[L{{i}^{+}}\] ion done
clear
B)
Extremely high electropositivity of \[Li\] done
clear
C)
Greater hardness of \[Li\] done
clear
D)
Hydration of \[L{{i}^{+}}\] ion done
clear
View Solution play_arrow
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question_answer58)
Acidified potassium permanganate solution is decolourised by [UPSEAT 2001]
A)
Bleaching powder done
clear
B)
Microcosmic salt done
clear
C)
Mohr salt done
clear
D)
White vitriol done
clear
View Solution play_arrow
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question_answer59)
Which one of the following is used as a disinfectant in water treatment [NDA 1999]
A)
Alum done
clear
B)
Charcoal done
clear
C)
Kieselguhr done
clear
D)
Potassium permanganate done
clear
View Solution play_arrow
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question_answer60)
Sodium thiosulphate is used in photography [UPSEAT 1999]
A)
To convert metallic silver into silver salt done
clear
B)
AgBr grain is reduced to non-metallic silver done
clear
C)
To remove reduced silver done
clear
D)
To remove undecomposed AgBr in the form of \[N{{a}_{3}}[Ag{{[{{S}_{2}}{{O}_{3}})}_{2}}]\] (a complex salt) done
clear
View Solution play_arrow
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question_answer61)
Composition of borax is [UPSEAT 2001;04]
A)
\[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.\,4{{H}_{2}}O\] done
clear
B)
\[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.\,10{{H}_{2}}O\] done
clear
C)
\[NaB{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}\] done
clear
View Solution play_arrow
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question_answer62)
When sodium dicarbonate is heated strongly for calcined in a kiln, it forms [CPMT 2000; KCET (Med.) 2000]
A)
\[Na\] done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
C)
\[NaC{{O}_{3}}\] done
clear
D)
\[NaHC{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer63)
The strongest reducing agent is [MP PET 2001]
A)
K done
clear
B)
Al done
clear
C)
Mg done
clear
D)
Br done
clear
View Solution play_arrow
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question_answer64)
The word 'alkali' is used for alkali metals indicates [RPMT 1999]
A)
Ash of the plants done
clear
B)
Metallic nature done
clear
C)
Silvery lusture done
clear
D)
Active metal done
clear
View Solution play_arrow
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question_answer65)
Potassium nitrate is called [RPMT 1999]
A)
Mohr's salt done
clear
B)
Gypsum done
clear
C)
Indian salt petre done
clear
D)
Chile salt petre done
clear
View Solution play_arrow
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question_answer66)
Which of the following chemicals, in addition to water, are used for the manufacture of \[N{{a}_{2}}C{{O}_{3}}\] by Solvay process [Roorkee 1999]
A)
\[NaCl,CO\] and \[N{{H}_{3}}\] done
clear
B)
\[NaCl,\,C{{O}_{2}}\] and \[N{{H}_{3}}\] done
clear
C)
\[NaCl,\,N{{H}_{4}}Cl\] and \[C{{O}_{2}}\] done
clear
D)
\[NaHC{{O}_{3}},\,CO\] and \[N{{H}_{3}}\] done
clear
View Solution play_arrow
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question_answer67)
Which metal forms amide with \[N{{H}_{3}}\] at \[{{300}^{o}}C\] [CPMT 1994]
A)
\[Mg\] done
clear
B)
\[Pb\] done
clear
C)
\[Al\] done
clear
D)
\[Na\] done
clear
View Solution play_arrow
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question_answer68)
When sodium is heated with moist air, then the product obtained is [AIIMS 1999]
A)
\[N{{a}_{2}}O\] done
clear
B)
\[NaOH\] done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
D)
\[N{{a}_{2}}{{O}_{2}}\] done
clear
View Solution play_arrow
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question_answer69)
An inorganic compound first melts then resolidifies and then liberates a gas. It may be [DPMT 2002]
A)
\[Mn{{O}_{2}}\] done
clear
B)
\[A{{l}_{2}}{{O}_{3}}\] done
clear
C)
\[KMn{{O}_{4}}\] done
clear
D)
\[KCl{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer70)
On dissolving moderate amount of sodium metal in liquid \[N{{H}_{3}}\] at low temperature, which one of the following does not occur [AIIMS 2003]
A)
Blue coloured solution is obtained done
clear
B)
\[N{{a}^{+}}\] ions are formed in the solution done
clear
C)
Liquid \[N{{H}_{3}}\] becomes good conductor of electricity done
clear
D)
Liquid ammonia remains diamagnetic done
clear
View Solution play_arrow
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question_answer71)
The solubility of the alkali metal carbonates [Pune CET 1998]
A)
Increases at first and then decreases done
clear
B)
Does not show regular variation done
clear
C)
Increases as we go down the group done
clear
D)
Decreases as we go down the group done
clear
View Solution play_arrow
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question_answer72)
Which of the following properties is not true for an alkali metal [Pune CET 1998]
A)
Low atomic volume done
clear
B)
Low ionization energy done
clear
C)
Low density done
clear
D)
Low electronegativity done
clear
View Solution play_arrow
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question_answer73)
Which of the following alkali metals has the biggest tendency for the half reaction, \[C{{O}_{2}}\] [DPMT 2001]
A)
Lithium done
clear
B)
Sodium done
clear
C)
Cesium done
clear
D)
Potassium done
clear
View Solution play_arrow
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question_answer74)
Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
A)
\[Zn{{(OH)}_{2}}\] done
clear
B)
\[Al{{(OH)}_{3}}\] done
clear
C)
\[Fe{{(OH)}_{3}}\] done
clear
D)
\[Pb{{(OH)}_{2}}\] done
clear
View Solution play_arrow
-
question_answer75)
Which one of the following on heating will not give \[C{{O}_{2}}\] [NDA 1999; BHU 2000]
A)
\[CaC{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
C)
\[PbC{{O}_{3}}\] done
clear
D)
\[L{{i}_{2}}C{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer76)
NaOH is prepared by the method [AFMC 2005]
A)
Down?s cell done
clear
B)
Castner cell done
clear
C)
Solvay process done
clear
D)
Castner Kellner cell done
clear
View Solution play_arrow
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question_answer77)
Sodium gives blue colour with \[N{{H}_{3}}\] solution, this blue colour is due to [UPSEAT 2000,02; AMU 2002; RPMT 2002]
A)
Ammoniated \[N{{a}^{\oplus }}\] done
clear
B)
Ammoniated \[N{{a}^{\Theta }}\] done
clear
C)
Ammoniated \[{{e}^{-}}\] done
clear
D)
\[N{{a}^{+}}/N{{a}^{-}}\]pair done
clear
View Solution play_arrow
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question_answer78)
The strongest reducing agent of the alkali metal is [CPMT 1999; Pb.CET 2001]
A)
Li done
clear
B)
Na done
clear
C)
K done
clear
D)
Cs done
clear
View Solution play_arrow
-
question_answer79)
With the increase in atomic weights, melting points of the alkali metals [MP PMT 1995]
A)
Increase done
clear
B)
Decrease done
clear
C)
Remain constant done
clear
D)
Do not show definite trend done
clear
View Solution play_arrow
-
question_answer80)
The reaction of water with sodium and potassium is [BHU 1999]
A)
Exothermic done
clear
B)
Endothermic done
clear
C)
Reversible done
clear
D)
Irreversible and endothermic done
clear
View Solution play_arrow
-
question_answer81)
When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is [CBSE PMT PMT 1999; KCET 2000]
A)
Ammonia done
clear
B)
Sulphur dioxide done
clear
C)
Carbon dioxide done
clear
D)
Carbon monoxide done
clear
View Solution play_arrow
-
question_answer82)
Characteristic feature of alkali metals is [RPMT 2000; MP PMT 2004]
A)
Good conductor of heat and electricity done
clear
B)
High melting points done
clear
C)
Low oxidation potentials done
clear
D)
High ionization potentials done
clear
View Solution play_arrow
-
question_answer83)
A substance X is a compound of an element of group IA the substance X gives a violet colour in flame test, X is [MP PMT 1980, 85, 86; CPMT 1985; DCE 2000]
A)
\[LiCl\] done
clear
B)
\[NaCl\] done
clear
C)
\[KCl\] done
clear
D)
None done
clear
View Solution play_arrow
-
question_answer84)
Which of the following alkali metal ions has lowest ionic mobility in aqueous solution [KCET 2000]
A)
\[R{{b}^{+}}\] done
clear
B)
\[C{{s}^{+}}\] done
clear
C)
\[L{{i}^{+}}\] done
clear
D)
\[N{{a}^{+}}\] done
clear
View Solution play_arrow
-
question_answer85)
Lithium shows similarities to magnesium in its chemical behaviour because [Pb. PMT 2000]
A)
Similar size, greater electronegativity and similar polarizing power. done
clear
B)
Similar size same electronegativity and lower polarizing power done
clear
C)
Similar size, same electronegativity and similar high polarizing power done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer86)
Which one of the following is the most electropositive element [Pb. PMT 2000]
A)
Calcium done
clear
B)
Chlorine done
clear
C)
Potassium done
clear
D)
Carbon done
clear
View Solution play_arrow
-
question_answer87)
Electrolysis of molten sodium chloride leads to the formation of [KCET 1990]
A)
\[Na\] and \[{{H}_{2}}\] done
clear
B)
\[Na\] and \[{{O}_{2}}\] done
clear
C)
\[{{H}_{2}}\] and \[{{O}_{2}}\] done
clear
D)
\[Na\] and \[C{{l}_{2}}\] done
clear
View Solution play_arrow
-
question_answer88)
When sodium bicarbonate is heated the product obtained is [Pb. CET 2000; DCE 2004]
A)
Na done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
C)
\[NaC{{O}_{3}}\] done
clear
D)
\[N{{a}_{2}}(HC{{O}_{3}})\] done
clear
View Solution play_arrow
-
question_answer89)
Which of the following is a use of alum [CPMT 2004]
A)
Making explosives done
clear
B)
Bleaching clothes done
clear
C)
Water softening done
clear
D)
All of the above done
clear
View Solution play_arrow
-
question_answer90)
Which of the following salt does not get hydrolysed in water [CPMT 2004]
A)
\[KCl{{O}_{4}}\] done
clear
B)
\[N{{H}_{4}}Cl\] done
clear
C)
\[C{{H}_{3}}COONa\] done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer91)
A fire of lithium, sodium and potassium can be extinguished by [DCE 2003]
A)
\[{{H}_{2}}O\] done
clear
B)
Nitrogen done
clear
C)
\[C{{O}_{2}}\] done
clear
D)
Asbestos blanket done
clear
View Solution play_arrow
-
question_answer92)
Which of the following metal has stable carbonates [AFMC 2004]
A)
Na done
clear
B)
Mg done
clear
C)
Al done
clear
D)
Si done
clear
View Solution play_arrow
-
question_answer93)
Aluminium reacts with caustic soda to form [DCE 2004]
A)
Aluminium hydroxide done
clear
B)
Aluminium oxide done
clear
C)
Sodium meta-aluminate done
clear
D)
Sodium tetra aluminate done
clear
View Solution play_arrow
-
question_answer94)
Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth's metal, is [BHU 2004]
A)
Stronger done
clear
B)
Weaker done
clear
C)
Volatile done
clear
D)
Not present done
clear
View Solution play_arrow
-
question_answer95)
Which of the following is a false statement [CPMT 2004]
A)
Fluorine is more electronegative than chlorine done
clear
B)
Nitrogen has greater \[\text{I}{{\text{E}}_{1}}\]than oxygen done
clear
C)
Lithium is amphoteric done
clear
D)
Chlorine is an oxidising agent done
clear
View Solution play_arrow
-
question_answer96)
Which is most basic in character [UPSEAT 2004]
A)
\[CsOH\] done
clear
B)
KOH done
clear
C)
NaOH done
clear
D)
LiOH done
clear
View Solution play_arrow
-
question_answer97)
Photoelectric effect is maximum in [AFMC 2004]
A)
\[Cs\] done
clear
B)
Na done
clear
C)
K done
clear
D)
Li done
clear
View Solution play_arrow
-
question_answer98)
A metal M reacts with \[{{N}_{2}}\] to give a compound 'A' \[({{M}_{3}}N)\]. 'A' on heating at high temperature gives back 'M' and 'A' on reacting with \[{{H}_{2}}O\]gives a gas 'B'. 'B' turns \[CuS{{O}_{4}}\]solution blue on passing through it. A and B can be [DCE 2003]
A)
Al and \[N{{H}_{3}}\] done
clear
B)
Li and \[N{{H}_{3}}\] done
clear
C)
Na and \[N{{H}_{3}}\] done
clear
D)
Mg and \[N{{H}_{3}}\] done
clear
View Solution play_arrow
-
question_answer99)
A solid compound 'X' on heating gives \[C{{O}_{2}}\] gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of \[C{{O}_{2}}\]through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is [CBSE PMT 2004]
A)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
B)
\[{{K}_{2}}C{{O}_{3}}\] done
clear
C)
\[Ca{{(HC{{O}_{3}})}_{2}}\] done
clear
D)
\[CaC{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer100)
mongst \[LiCl,\ RbCl,\ BeC{{l}_{2}}\] and \[MgC{{l}_{2}}\]the compounds with the greatest and least ionic character respectively are [Pb. CET 2004]
A)
\[LiCl\] and \[RbCl\] done
clear
B)
\[MgC{{l}_{2}}\]and \[BeC{{l}_{2}}\] done
clear
C)
\[RbCl\] and \[BeC{{l}_{2}}\] done
clear
D)
\[RbCl\] and \[MgC{{l}_{2}}\] done
clear
View Solution play_arrow
-
question_answer101)
Salt cake is
A)
Sodium sulphate done
clear
B)
Sodium chloride done
clear
C)
Sodium bisulphite done
clear
D)
Sodium sulphate and Sodium chloride done
clear
View Solution play_arrow
-
question_answer102)
Globar salt is [BHU 1983; CPMT 1988, 91; IIT 1985; MP PET 2000]
A)
\[MgS{{O}_{4}}.7{{H}_{2}}O\] done
clear
B)
\[CuS{{O}_{4}}.\,5{{H}_{2}}O\] done
clear
C)
\[FeS{{O}_{4}}.7{{H}_{2}}O\] done
clear
D)
\[N{{a}_{2}}S{{O}_{4}}.\,10{{H}_{2}}O\] done
clear
View Solution play_arrow
-
question_answer103)
The colour given to the flame by sodium salts is [CPMT 1980; MP PET 1986]
A)
Light red done
clear
B)
Golden yellow done
clear
C)
Green done
clear
D)
Pink done
clear
View Solution play_arrow
-
question_answer104)
Solvay's process is used for the preparation of [CPMT 1982; AIIMS 1987]
A)
Ammonia done
clear
B)
Sodium bicarbonate done
clear
C)
Sodium carbonate done
clear
D)
Calcium carbonate done
clear
View Solution play_arrow
-
question_answer105)
Sodium when heated in a current of dry ammonia gives [NCERT 1981; KCET 2000]
A)
Sodium nitrite done
clear
B)
Sodium hydride done
clear
C)
Sodium amide done
clear
D)
Sodium azide done
clear
View Solution play_arrow
-
question_answer106)
Washing soda is [CPMT 1982; DPMT 1982; CBSE PMT 1990; MP PMT 1987, 96]
A)
\[N{{a}_{2}}C{{O}_{3}}.\,10{{H}_{2}}O\] done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}.{{H}_{2}}O\] done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}.\,5{{H}_{2}}O\] done
clear
D)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer107)
The substance used to decolourise and purify oils is [MP PMT 1987]
A)
Sodium carbonate done
clear
B)
Sodium chloride done
clear
C)
Sodium hydroxide done
clear
D)
Sodium sulphate done
clear
View Solution play_arrow
-
question_answer108)
The main salt soluble in sea water is [MP PMT 1998]
A)
\[MgC{{l}_{2}}\] done
clear
B)
\[NaCl\] done
clear
C)
\[MgS{{O}_{4}}\] done
clear
D)
\[CaS{{O}_{4}}\] done
clear
View Solution play_arrow
-
question_answer109)
The metallic lustre exhibited by sodium is explained by [IIT 1987]
A)
Diffusion of sodium ions done
clear
B)
Oscillation of loose electrons done
clear
C)
Excitation of free protons done
clear
D)
Existence of body centred cubic lattice done
clear
View Solution play_arrow
-
question_answer110)
The metal which reacts with water at room temperature is [CPMT 1985; MP PMT 1996; MP PET 1998]
A)
Copper done
clear
B)
Iron done
clear
C)
Magnesium done
clear
D)
Sodium done
clear
View Solution play_arrow
-
question_answer111)
When \[NaCl\] is dissolved in water, the sodium ion is [CPMT 1989]
A)
Oxidised done
clear
B)
Reduced done
clear
C)
Hydrolysed done
clear
D)
Hydrated done
clear
View Solution play_arrow
-
question_answer112)
Sodium metal cannot be stored under [CPMT 1985, 88, 94]
A)
Benzene done
clear
B)
Kerosene done
clear
C)
Alcohol done
clear
D)
Toluene done
clear
View Solution play_arrow
-
question_answer113)
Causticization process is used for the preparation of [CPMT 1985; BHU 1986]
A)
Caustic soda done
clear
B)
Caustic potash done
clear
C)
Baryta done
clear
D)
Slaked lime done
clear
View Solution play_arrow
-
question_answer114)
When \[CO\] is passed over solid \[NaOH\] heated to \[{{200}^{o}}C\], it forms [MP PMT 1985]
A)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
B)
\[NaHC{{O}_{3}}\] done
clear
C)
\[HCOONa\] done
clear
D)
None done
clear
View Solution play_arrow
-
question_answer115)
\[NaOH\] is manufactured by electrolysis of brine solution. The products of the reaction are [KCET 1990]
A)
\[C{{l}_{2}}\] and \[{{H}_{2}}\] done
clear
B)
\[C{{l}_{2}}\] and \[Na-Hg\] done
clear
C)
\[C{{l}_{2}}\] and \[Na\] done
clear
D)
\[C{{l}_{2}}\] and \[{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer116)
Sodium carbonate is manufactured by Solvay process, the products that are recycled are [KCET 1993; DCE 1999]
A)
\[C{{O}_{2}}\] and \[N{{H}_{3}}\] done
clear
B)
\[C{{O}_{2}}\] and \[N{{H}_{4}}Cl\] done
clear
C)
\[NaCl,\,CaO\] done
clear
D)
\[CaC{{l}_{2}},\,CaO\] done
clear
View Solution play_arrow
-
question_answer117)
The useful bye-products, obtained in the Solvay process of manufacturing sodium carbonate, are [KCET 1989, 93]
A)
Quick lime and \[C{{O}_{2}}\] done
clear
B)
\[NaHC{{O}_{3}}\] and \[N{{H}_{4}}Cl\] done
clear
C)
\[N{{H}_{4}}Cl\] solution and quick lime done
clear
D)
\[NaHC{{O}_{3}}\] and \[C{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer118)
In the preparation of sodium carbonate, which of the following is used [AFMC 1992]
A)
Slaked lime done
clear
B)
Quick lime done
clear
C)
Lime stone done
clear
D)
\[NaOH\] done
clear
View Solution play_arrow
-
question_answer119)
When \[NaOH\] crystals are left in open air, they acquire a fluid layer around each crystal as [CPMT 1974]
A)
They start melting done
clear
B)
They absorb moisture from air done
clear
C)
They react with air to form a liquid compound done
clear
D)
They absorb \[C{{O}_{2}}\] from air done
clear
View Solution play_arrow
-
question_answer120)
Sodium carbonate reacts with \[S{{O}_{2}}\] in aqueous medium to give [MP PMT 1982, 85]
A)
\[NaHS{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}S{{O}_{3}}\] done
clear
C)
\[NaHS{{O}_{4}}\] done
clear
D)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
View Solution play_arrow
-
question_answer121)
Baking soda is [CPMT 1974, 78, 79, 91; BHU 1979; Manipal MEE 1995; AIIMS 1996; CPMT 1973; RPET 1999; AFMC 2001, 05; Pb. CET 2002]
A)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
B)
\[NaHC{{O}_{3}}\] done
clear
C)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
D)
\[{{K}_{2}}C{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer122)
Soda ash is [KCET 1993]
A)
\[N{{a}_{2}}C{{O}_{3}}.{{H}_{2}}O\] done
clear
B)
\[NaOH\] done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
D)
\[NaHC{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer123)
Soda lime is [KCET 1993]
A)
\[NaOH\] done
clear
B)
\[CaO\] done
clear
C)
\[NaOH\] and \[CaO\] done
clear
D)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer124)
Molten sodium is used in nuclear reactors to [KCET 1989]
A)
Absorb neutrons in order to control the chain reaction done
clear
B)
Slow down the fast neutrons done
clear
C)
Absorb the heat generated by nuclear fission done
clear
D)
Extract radio-isotopes produced in the reactor done
clear
View Solution play_arrow
-
question_answer125)
Squashes are stored by adding [AFMC 1989]
A)
Citric acid done
clear
B)
\[KCl\] done
clear
C)
\[N{{a}_{2}}S{{O}_{3}}\] done
clear
D)
Sodium metabisulphite done
clear
View Solution play_arrow
-
question_answer126)
Sodium thiosulphate \[(N{{a}_{2}}{{S}_{2}}{{O}_{3}}.5{{H}_{2}}O)\] is used in photography to [CPMT 1972, 74, 79; DPMT 1983; Bihar CEE 1995; MNR 1995]
A)
Reduce silver bromide to metallic silver done
clear
B)
Convert metallic silver to silver salt done
clear
C)
Remove undecomposed \[AgBr\]as a soluble silver thisulphate complex done
clear
D)
Remove unreduced silver done
clear
View Solution play_arrow
-
question_answer127)
Which of the following pair can't exist in solution [IIT 1986; DCE 1999]
A)
\[NaHC{{O}_{3}}\] and \[NaOH\] done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\] and \[NaOH\] done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}\] and \[NaCl\] done
clear
D)
\[NaHC{{O}_{3}}\] and \[NaCl\] done
clear
View Solution play_arrow
-
question_answer128)
Sodium thiosulphate is prepared by [IIT 1996]
A)
Reducing \[N{{a}_{2}}S{{O}_{4}}\] solution with \[{{H}_{2}}S\] done
clear
B)
Boiling \[N{{a}_{2}}S{{O}_{3}}\] solution with \[S\] in alkaline medium done
clear
C)
Neutralising \[{{H}_{2}}{{S}_{2}}{{O}_{3}}\] solution with \[NaOH\] done
clear
D)
Boiling \[N{{a}_{2}}S{{O}_{3}}\] solution with \[S\] in acidic medium done
clear
View Solution play_arrow
-
question_answer129)
When \[NaOH\] is prepared, the gas released is [CPMT 1996]
A)
\[C{{l}_{2}}\] done
clear
B)
\[{{H}_{2}}\] done
clear
C)
\[{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}O\] done
clear
View Solution play_arrow
-
question_answer130)
What is lye [BHU 1997]
A)
10% solution of \[NaCl\] done
clear
B)
10% solution of \[KOH\] done
clear
C)
10% solution of \[Ca{{(OH)}_{2}}\] done
clear
D)
10% solution of \[N{{a}_{2}}C{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer131)
\[Na\] imparts yellow colour to Bunsen flame because of [RPMT 1997]
A)
Low ionisation potential done
clear
B)
Sensitivity done
clear
C)
Sublimation done
clear
D)
Absorbed high radiation done
clear
View Solution play_arrow
-
question_answer132)
\[Sn\] is dissolved in excess of \[NaOH\] solution, the compound obtained is [RPMT 1997]
A)
\[Sn{{(OH)}_{2}}\] done
clear
B)
\[N{{a}_{2}}Sn{{O}_{3}}\] done
clear
C)
\[N{{a}_{2}}Sn{{O}_{2}}\] done
clear
D)
\[Sn{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer133)
Identify the correct statement [CPMT 1997]
A)
Elemental sodium can be prepared and isolated by electrolysing an aqueous solution of sodium chloride done
clear
B)
Elemental sodium is a strong oxidizing agent done
clear
C)
Elemental sodium is insoluble in ammonia done
clear
D)
Elemental sodium is easily oxidized done
clear
View Solution play_arrow
-
question_answer134)
Calcium is obtained by [CBSE PMT 1997]
A)
Roasting of limestone done
clear
B)
Electrolysis of solution of calcium chloride in \[{{H}_{2}}O\] done
clear
C)
Reduction of calcium chloride with carbon done
clear
D)
Electrolysis of molten anhydrous calcium chloride done
clear
View Solution play_arrow
-
question_answer135)
When sodium chloride solution is electrolysed, the gas that is liberated at the cathode is [Kurukshetra CEE 1998]
A)
Oxygen done
clear
B)
Hydrogen done
clear
C)
Chlorine done
clear
D)
Air done
clear
View Solution play_arrow
-
question_answer136)
During the electrolysis of fused sodium chloride, the anodic reaction is [KCET 1998]
A)
Reduction of sodium ions done
clear
B)
Oxidation of sodium ions done
clear
C)
Reduction of chloride ions done
clear
D)
Oxidation of chloride ions done
clear
View Solution play_arrow
-
question_answer137)
Which of the following does not participate in the Solvey's process for the manufacture of \[N{{a}_{2}}C{{O}_{3}}\] [EAMCET 1998]
A)
\[N{{H}_{3}}\] done
clear
B)
\[NaCl\] solution done
clear
C)
\[C{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
View Solution play_arrow
-
question_answer138)
The colour of the precipitate produced by adding \[NaOH\] solution to \[HgC{{l}_{2}}\]is [KCET 1998]
A)
Yellow done
clear
B)
Black done
clear
C)
Brown done
clear
D)
White done
clear
View Solution play_arrow
-
question_answer139)
The cell used for the electrolysis of fused \[NaCl\]is [AFMC 1999; Kerala (Mea.) 2002]
A)
Down?s cell done
clear
B)
Castner cell done
clear
C)
Solvay cell done
clear
D)
Nelson cell done
clear
View Solution play_arrow
-
question_answer140)
Slaked lime \[[Ca{{(OH)}_{2}}]\] is used in the manufacture [UPSEAT 2000]
A)
Cement done
clear
B)
Fire bricks done
clear
C)
Pigment done
clear
D)
Medicine done
clear
View Solution play_arrow
-
question_answer141)
The alum used for purifying water is [KCET (Med.) 2001]
A)
Ferric alum done
clear
B)
Chrome alum done
clear
C)
Potash alum done
clear
D)
Ammonium alum done
clear
View Solution play_arrow
-
question_answer142)
Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
A)
\[Zn{{(OH)}_{2}}\] done
clear
B)
\[Al\,{{(OH)}_{3}}\] done
clear
C)
\[Fe{{(OH)}_{3}}\] done
clear
D)
\[Pb{{(OH)}_{2}}\] done
clear
View Solution play_arrow
-
question_answer143)
In which of the following processes, fused sodium hydroxide is electrolysed at a \[{{330}^{o}}C\]temperature for extraction of sodium [CBSE PMT 2000; AFMC 2001]
A)
Castner's process done
clear
B)
Down's process done
clear
C)
Cyanide process done
clear
D)
Both b and c done
clear
View Solution play_arrow
-
question_answer144)
Excess of \[N{{a}^{+}}\]ions in our system causes [KCET (Med.) 2001]
A)
High B.P. done
clear
B)
Low B.P. done
clear
C)
Diabetes done
clear
D)
Anaemia done
clear
View Solution play_arrow
-
question_answer145)
Ferric alum has the composition \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.F{{e}_{2}}{{(S{{O}_{4}})}_{3}}.x{{H}_{2}}O\] [Orissa JEE 2002]
A)
7 done
clear
B)
24 done
clear
C)
6 done
clear
D)
15 done
clear
View Solution play_arrow
-
question_answer146)
If \[Na\]is heated in presence of air, it forms [AFMC 2002]
A)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}{{O}_{2}}\] done
clear
C)
\[N{{a}_{2}}O\] done
clear
D)
Both b and c done
clear
View Solution play_arrow
-
question_answer147)
Which of the following is most reducing agent [RPMT 2002]
A)
\[HN{{O}_{3}}\] done
clear
B)
\[Na\] done
clear
C)
\[C{{l}_{2}}\] done
clear
D)
\[Cr\] done
clear
View Solution play_arrow
-
question_answer148)
Pyrolusite is [DPMT 2002]
A)
Carbonate ore done
clear
B)
Sulphur ore done
clear
C)
Silicon ore done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer149)
In the manufacture of metallic sodium by the fused salt electrolysis (Down's process) a small amount of calcium chloride is added to [MP PET 1993; MP PMT 1994]
A)
Improve the electrical conduction done
clear
B)
Increase the temperature of electrolysis done
clear
C)
Bring down the melt temperature done
clear
D)
Stabilize the metallic sodium done
clear
View Solution play_arrow
-
question_answer150)
Sodium metal is extracted by [MP PMT 1996]
A)
Electrolysis of aqueous solution of sodium chloride done
clear
B)
Electrolysis of fused sodium chloride done
clear
C)
Heating sodium oxide with carbon done
clear
D)
Heating sodium oxide with hydrogen done
clear
View Solution play_arrow