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question_answer1)
When electric current is passed through an ionic hydride in molten state:
A)
hydrogen is liberated at anode done
clear
B)
hydrogen is liberated at cathode done
clear
C)
hydride ion migrates towards cathode done
clear
D)
hydride ion remains is solution done
clear
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question_answer2)
Among \[Ca{{H}_{2}},N{{H}_{2}},NaH\] and \[{{B}_{2}}{{H}_{6}}\] which are covalent hydrides?
A)
\[N{{H}_{3}}\] and \[{{B}_{2}}{{H}_{6}}\] done
clear
B)
\[NaH\] and \[Ca{{H}_{2}}\] done
clear
C)
\[NaH\] and \[N{{\text{H}}_{3}}\] done
clear
D)
\[Ca{{H}_{2}}\] and \[{{B}_{2}}{{H}_{6}}\] done
clear
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question_answer3)
Polyphosphates are used as water softening agents because they
A)
form soluble complexes with anionic species done
clear
B)
precipitate anionic species done
clear
C)
form soluble complexes with cationic species done
clear
D)
precipitate cationic species done
clear
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question_answer4)
When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?
A)
Hydrogen bond formation done
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B)
van der Waals forces done
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C)
Covalent attraction done
clear
D)
Ionic interaction done
clear
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question_answer5)
Hydrogen molecules differs from chlorine molecule in the following respect
A)
Hydrogen molecule is non-polar but chlorine molecule is polar done
clear
B)
Hydrogen molecule is polar while chlorine molecule is non-polar done
clear
C)
Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not done
clear
D)
Hydrogen molecule cannot participate in coordination bond formation but chlorine molecule can done
clear
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question_answer6)
The adsorption of hydrogen by metals is called
A)
Dehydrogenation done
clear
B)
Hydrogenation done
clear
C)
Occlusion done
clear
D)
Adsorption done
clear
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question_answer7)
Which of the following statements do not define the characteristic property of water "Water is a universal solvent"
A)
It can dissolve maximum number of compounds done
clear
B)
It has very low dielectric constant done
clear
C)
It has high liquid range done
clear
D)
None of these done
clear
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question_answer8)
A, 6 volume sample of \[{{H}_{2}}{{O}_{2}}\]
A)
will contain 6% V/V of \[{{H}_{2}}{{O}_{2}}\] done
clear
B)
will contain 6% W/V of \[{{H}_{2}}{{O}_{2}}\] done
clear
C)
would give 6 volumes of oxygen per unit volume of \[{{H}_{2}}{{O}_{2}}\] sample at STP done
clear
D)
would give 6 volumes of oxygen per unit weight of \[{{H}_{2}}{{O}_{2}}\] sample at STP done
clear
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question_answer9)
34 g of \[{{H}_{2}}{{O}_{2}}\] is present in 1120 mL of solution. This solution is called
A)
10 vol solution done
clear
B)
20 vol solution done
clear
C)
34 vol solution done
clear
D)
32 vol solution done
clear
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question_answer10)
Hydrogen can be fused to form helium at
A)
high temperature and high pressure done
clear
B)
high temperature and low pressure done
clear
C)
low temperature and high pressure done
clear
D)
low temperature and low pressure done
clear
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question_answer11)
The oxidation states of most electronegative element in the products of reaction \[Ba{{O}_{2}}\] with dil \[{{H}_{2}}{{O}_{2}}\] are
A)
0 and -1 done
clear
B)
-1 and -2 done
clear
C)
-2 and 0 done
clear
D)
-2 and +1 done
clear
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question_answer12)
A 5.0 mL solution of \[{{H}_{2}}{{O}_{2}}\] liberates 1.27 g of iodine from an acidified KI solution. The percentage strength of \[{{H}_{2}}{{O}_{2}}\] is
A)
11.2 done
clear
B)
5.6 done
clear
C)
1.7 done
clear
D)
3.4 done
clear
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question_answer13)
3.4 g sample of \[{{H}_{2}}{{O}_{2}}\] solution containing x% \[{{H}_{2}}{{O}_{2}}\] by weight requires x mL of \[KMn{{O}_{4}}\]solution for complete oxidation under acidic condition. The normality of \[KMn{{O}_{4}}\] solution is
A)
IN done
clear
B)
2N done
clear
C)
3N done
clear
D)
0.5N done
clear
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question_answer14)
\[{{H}_{2}}{{O}_{2}}\to 2{{H}^{+}}+{{O}_{2}}+2{{e}^{-}};E{}^\circ =-0.68V.\] This equation represents which of the following behaviour of\[{{H}_{2}}{{O}_{2}}\] ?
A)
Reducing done
clear
B)
Oxidising done
clear
C)
Acidic done
clear
D)
Catalytic done
clear
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question_answer15)
When a substance Areacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner. A, B, C and D respectively are
A)
\[Na,{{H}_{2}},NaOH,Zn\] done
clear
B)
\[K,{{H}_{2}},KOH,Al\] done
clear
C)
\[Ca,{{H}_{2}},Ca{{\left( OH \right)}_{2}},Sn\] done
clear
D)
\[Ca{{C}_{2}},{{C}_{2}}{{H}_{2}},Ca{{(OH)}_{2}},Fe\] done
clear
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question_answer16)
\[HCl\] is added to following oxides. Which one would give \[{{H}_{2}}{{O}_{2}}\]
A)
\[Mn{{O}_{2}}\] done
clear
B)
\[Pb{{O}_{2}}\] done
clear
C)
\[BaO\] done
clear
D)
None done
clear
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question_answer17)
Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When \[C{{O}_{2}}\] is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?
A)
\[CaC{{O}_{3}}\] done
clear
B)
\[CaO\] done
clear
C)
\[Ca{{(OH)}_{2}}\] done
clear
D)
\[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\] done
clear
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question_answer18)
Which physical property of dihydrogen is wrong?
A)
Odourless gas done
clear
B)
Tasteless gas done
clear
C)
Colourless gas done
clear
D)
Non-inflammable gas done
clear
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question_answer19)
Permanent hardness in water cannot be cured by:
A)
Treatment with washing soda done
clear
B)
Boiling done
clear
C)
Calgon's method done
clear
D)
Ion exchange method done
clear
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question_answer20)
Which of the following metal evolves hydrogen on reaction with cold dilute\[HN{{O}_{3}}\]?
A)
Mg done
clear
B)
Al done
clear
C)
Fe done
clear
D)
Cu done
clear
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question_answer21)
The alum used for purifying water is
A)
Ferric alum done
clear
B)
Chrome alum done
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C)
Potash alum done
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D)
Ammonium alum done
clear
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question_answer22)
What is formed when calcium carbide reacts with heavy water?
A)
\[{{C}_{2}}{{D}_{2}}\] done
clear
B)
\[Ca{{D}_{2}}\] done
clear
C)
\[C{{a}_{2}}{{D}_{2}}O\] done
clear
D)
\[C{{D}_{2}}\] done
clear
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question_answer23)
The hydride ion \[{{H}^{-}}\] is stronger base than its hydroxide ion\[O{{H}^{-}}\]. Which of the following reactions will occur if sodium hydride \[\left( NaH \right)\] is dissolved in water?
A)
\[{{H}^{-}}(aq)+{{H}_{2}}O\to {{H}_{3}}{{O}^{-}}\] done
clear
B)
\[{{H}^{-}}\left( aq \right)+{{H}_{2}}O\left( l \right)\to O{{H}^{-}}+{{H}_{2}}\] done
clear
C)
\[{{H}^{-}}~+{{H}_{2}}O\to \] No reaction done
clear
D)
None of these done
clear
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question_answer24)
In context with the industrial preparation of hydrogen from water gas \[{{(CO+H)}_{2}}\] which of the following is the correct statement?
A)
\[CO\] and \[{{H}_{2}}\] are fractionally separated using differences in their densities done
clear
B)
CO is removed by absorption in aqueous \[C{{u}_{2}}C{{l}_{2}}\] solution done
clear
C)
\[{{H}_{2}}\] is removed through occlusion with Pd done
clear
D)
CO is oxidised to \[C{{O}_{2}}\] with steam in the presence of a catalyst followed by absorption of \[C{{O}_{2}}\]in alkali done
clear
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question_answer25)
The dielectric constant of \[{{H}_{2}}{{O}_{2}}\] is 80. The electrostatic force of attraction between \[N{{a}^{+}}\] and \[C{{l}^{-}}\] will be
A)
reduced to 1 /40 in water than in air done
clear
B)
reduced to 1/80 in water than in air done
clear
C)
will be increased to 80 in water than in air done
clear
D)
will remain unchanged. done
clear
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question_answer26)
Which of the following is not true?
A)
\[{{D}_{2}}O\] freezes at lower temperature than \[{{H}_{2}}O\] done
clear
B)
Reaction between \[{{H}_{2}}\] and \[C{{l}_{2}}\] is much faster than \[{{D}_{2}}\]and \[C{{l}_{2}}\] done
clear
C)
Ordinary water gets electrolysed more rapidly than \[{{D}_{2}}O\] done
clear
D)
Bond dissociation energy of \[{{D}_{2}}\] is greater than \[{{H}_{2}}\] done
clear
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question_answer27)
\[{{H}_{2}}{{O}_{2}}\] is always stored in black bottles because
A)
It is highly unstable done
clear
B)
Its enthalpy of decomposition is high done
clear
C)
It undergoes auto-oxidation on prolonged standing done
clear
D)
None of these done
clear
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question_answer28)
Which of the following is wrong about \[{{H}_{2}}{{O}_{2}}\] It is used
A)
as an aerating agent in production of sponge rubber done
clear
B)
as an antichlor done
clear
C)
for restoring white colour of blackened lead painting done
clear
D)
None of these done
clear
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question_answer29)
100 mL of 0.01 \[M\,KMn{{O}_{4}}\] oxidises 100 mL \[{{H}_{2}}{{O}_{2}}\] in acidic medium. Volume of the same\[KMn{{O}_{4}}\] required in alkaline medium to oxidise 100 mL of the same \[{{H}_{2}}{{O}_{2}}\] will be (\[MnO_{4}^{-}\] changes to \[M{{n}^{2+}}\] in acidic medium and to \[Mn{{O}_{2}}\] in alkaline medium)
A)
\[\frac{100}{3}mL\] done
clear
B)
\[\frac{500}{3}mL\] done
clear
C)
\[\frac{300}{5}mL\] done
clear
D)
None done
clear
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question_answer30)
The purity of \[{{H}_{2}}{{O}_{2}}\] in a given sample is 85%. Calculate the weight of impure sample of \[{{H}_{2}}{{O}_{2}}\] which requires 10 mL of \[M/5\text{ }KMn{{O}_{4}}\] solution in titration in acidic medium
A)
2 g done
clear
B)
0.2 g done
clear
C)
0.17 g done
clear
D)
0.15 g done
clear
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question_answer31)
Barium peroxide reacts with phosphoric acid to produce barium phosphate along with
A)
water done
clear
B)
hydrogen peroxide done
clear
C)
dioxygen done
clear
D)
phosphine done
clear
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question_answer32)
The normality and volume strength of a solution made by mixing 1.0 L each of 5.6 volume and 11.2 volume \[{{H}_{2}}{{O}_{2}}\] solution are:
A)
1 N, 5.6 vol done
clear
B)
1.5 N, 5.6 vol done
clear
C)
1.5 N, 8.4 vol done
clear
D)
1 N, 8.4 vol done
clear
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question_answer33)
The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively:
A)
8, 10, 11 done
clear
B)
10, 10, 10 done
clear
C)
10, 11, 10 done
clear
D)
11, 10, 10 done
clear
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question_answer34)
2 g of aluminium is treated separately with excess of dilute \[{{H}_{2}}S{{O}_{4}}\] and excess of \[NaOH.\] The ratio of the volumes of hydrogen evolved is
A)
2:3 done
clear
B)
1:1 done
clear
C)
2:1 done
clear
D)
1:2 done
clear
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question_answer35)
Which of the following statements is correct?
A)
Hydrogen has same IP as alkali metals done
clear
B)
Hydrogen has same electronegativity as halogens done
clear
C)
Hydrogen has oxidation number of \[-1\]and +1 done
clear
D)
Hydrogen will not be liberated at anode. done
clear
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question_answer36)
Which of the following terms is not correct for hydrogen?
A)
Its molecule is diatomic done
clear
B)
It exists both as \[{{H}^{+}}\] and \[{{H}^{-}}\] in different chemical compounds done
clear
C)
It is the only species which has no neutrons in the nucleus done
clear
D)
Heavy water is unstable because hydrogen is substituted by its isotope deuterium done
clear
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question_answer37)
Hard water is not fit for washing clothes because
A)
it contains \[N{{a}_{2}}S{{O}_{4}}\] and \[KCl\] done
clear
B)
It gives precipitate done
clear
C)
it contains impurities done
clear
D)
it is acidic in nature done
clear
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question_answer38)
The amount of \[{{H}_{2}}{{\text{O}}_{2}}\] present in 1 litre of \[1.5N{{H}_{2}}{{\text{O}}_{2}}\] solution, is:
A)
25.5 g done
clear
B)
3.0 g done
clear
C)
8.0 g done
clear
D)
2.5 g done
clear
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question_answer39)
20 volume \[{{H}_{2}}{{O}_{2}}\] solution has a strength of about
A)
30% done
clear
B)
6% done
clear
C)
3% done
clear
D)
10% done
clear
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question_answer40)
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution the ratio of volumes of hydrogen evolved is
A)
1:1 done
clear
B)
1:2 done
clear
C)
2:1 done
clear
D)
9:4 done
clear
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question_answer41)
Hydrogen at room temperature contains:
A)
25% ortho + 75% para done
clear
B)
25% para + 75% ortho done
clear
C)
50% ortho + 50% para done
clear
D)
60% ortho + 34% para done
clear
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question_answer42)
In Bosch's process, which gas is utilised for the production of hydrogen gas?
A)
Producer gas done
clear
B)
Water gas done
clear
C)
Coal gas done
clear
D)
None of these done
clear
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question_answer43)
\[{{D}_{2}}O\] is preferred to \[{{H}_{2}}O,\]as a moderator, in nuclear reactors because
A)
\[{{D}_{2}}O\] slows down fast neutrons better done
clear
B)
\[{{D}_{2}}O\] has high specific heat done
clear
C)
\[{{D}_{2}}O\] is cheaper done
clear
D)
None of these done
clear
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question_answer44)
Consider the following statements:
1. |
Atomic hydrogen is obtained by passing hydrogen through an electric arc. |
2. |
Hydrogen gas will not reduce heated aluminium oxide. |
3. |
Finely divided palladium adsorbs large volume of hydrogen gas |
4. |
Pure nascent hydrogen is best obtained by reacting Na with \[{{C}_{2}}{{H}_{5}}OH\] |
|
Which of the above statements is/are correct? |
A)
1 alone done
clear
B)
2 alone done
clear
C)
1, 2 and 3 done
clear
D)
2, 3 and 4 done
clear
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question_answer45)
Water is:
A)
more polar than \[{{H}_{2}}S\] done
clear
B)
more or less identical in polarity with \[{{H}_{2}}S\] done
clear
C)
less polar than \[{{H}_{2}}S\] done
clear
D)
None of these done
clear
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question_answer46)
Calgon used as a water softener is
A)
\[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{3}})}_{6}}]\] done
clear
B)
\[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{3}})}_{6}}]\] done
clear
C)
\[N{{a}_{4}}[N{{a}_{4}}{{(P{{O}_{4}})}_{5}}]\] done
clear
D)
\[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{4}})}_{6}}]\] done
clear
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question_answer47)
In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] is acting as a reducing agent
A)
\[{{H}_{2}}{{O}_{2}}+S{{O}_{2}}\to {{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[2KI+{{H}_{2}}{{O}_{2}}\to 2KOH+{{I}_{2}}\] done
clear
C)
\[PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O\] done
clear
D)
\[A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}\] done
clear
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question_answer48)
Which of the following statements are correct?
(i) Hydrogen peroxide is industrially prepared by the auto-oxidation of 2-alkyl anthraquinols |
(ii) One millilitre of 30% \[{{H}_{2}}{{O}_{2}}\] means that solution will give 100 V of oxygen at STP |
(iii) Dihedral angle of \[{{H}_{2}}{{O}_{2}}\] in gas phase is \[90.2{}^\circ \] and in solid phase dihedral angle is \[111.5{}^\circ \] |
A)
(i), (ii) and (iii) done
clear
B)
(i) and (iii) done
clear
C)
(ii) and (iii) done
clear
D)
(i) and (ii) done
clear
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question_answer49)
When a sample of hard water is passed through the layer of sodium zeolite resulting which of the following ions will not be present in the resulting sample of water obtained?
A)
\[M{{g}^{2+}}\] and \[C{{a}^{2+}}\] done
clear
B)
\[C{{a}^{2+}}\] and \[N{{a}^{+}}\] done
clear
C)
\[M{{g}^{2+}}\] and \[CO_{3}^{2-}\] done
clear
D)
\[CO_{3}^{2-}\] and \[C{{l}^{-}}\] done
clear
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question_answer50)
Which statement is wrong?
A)
Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen done
clear
B)
In ortho hydrogen spin of two nuclei is in same direction done
clear
C)
Ortho and para forms do not resemble in their chemical properties done
clear
D)
In para hydrogen spin of two nuclei is in opposite direction. done
clear
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question_answer51)
An orange coloured solution acidified with \[{{H}_{2}}S{{O}_{4}}\] and treated with a substance 'X' gives a blue coloured solution of\[Cr{{O}_{5}}\]. The substance 'X' is
A)
\[{{H}_{2}}{{O}_{2}}\] done
clear
B)
\[{{H}_{2}}O\] done
clear
C)
dil \[HCl\] done
clear
D)
conc \[HCl\] done
clear
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question_answer52)
Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent in acid medium?
A)
\[MnO_{4}^{-}\] done
clear
B)
\[C{{r}_{2}}O_{7}^{2-}\] done
clear
C)
\[SO_{3}^{2-}\] done
clear
D)
KI done
clear
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question_answer53)
Pick out the correct statement
A)
By decreasing the temperature pure para- hydrogen can be obtained done
clear
B)
By increasing the temperature pure ortho- hydrogen can be obtained done
clear
C)
By decreasing the temperature pure ortho- hydrogen can be obtained done
clear
D)
By increasing the temperature pure para- hydrogen can be obtained done
clear
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question_answer54)
An inorganic compound gives off \[{{O}_{2}}\] when heated, turns an acidic solution of KI violet and reduces acidified\[KMn{{O}_{4}}\]. The compound is
A)
\[S{{O}_{3}}\] done
clear
B)
\[KN{{O}_{3}}\] done
clear
C)
\[{{H}_{2}}{{O}_{2}}\] done
clear
D)
All of these done
clear
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question_answer55)
The reaction of \[{{H}_{2}}{{O}_{2}}\] with sulphur is an example of........ reaction
A)
Addition done
clear
B)
Oxidation done
clear
C)
Reduction done
clear
D)
Redox done
clear
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question_answer56)
Which substance does not speed up decomposition of \[{{H}_{2}}{{O}_{2}}\]?
A)
Glycerol done
clear
B)
Pt done
clear
C)
Gold done
clear
D)
\[Mn{{O}_{2}}\] done
clear
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question_answer57)
When zeolite (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with
A)
\[{{H}^{+}}\] ions done
clear
B)
\[C{{a}^{2+}}ions\] done
clear
C)
\[S{{O}_{4}}^{2-}\] ions done
clear
D)
\[O{{H}^{-}}\] ions done
clear
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question_answer58)
Saline hydrides react explosively with water, such fires can be extinguished by
A)
water done
clear
B)
carbon dioxide done
clear
C)
sand done
clear
D)
None of these done
clear
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question_answer59)
30 volume hydrogen peroxide means
A)
30% of \[{{H}_{2}}{{O}_{2}}\] solution done
clear
B)
\[30\text{ }c{{m}^{3}}\] solution contains 1g of \[{{H}_{2}}{{O}_{2}}\] done
clear
C)
\[1\text{ }c{{m}^{3}}\] of solution liberates \[30\text{ }c{{m}^{3}}\] of \[{{O}_{2}}\] at STP done
clear
D)
\[30\text{ }c{{m}^{3}}\] of solution contains 1 mole of \[{{H}_{2}}{{O}_{2}}\] done
clear
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question_answer60)
Hydrogen peroxide in its reaction with \[Kl{{O}_{4}}\] and \[N{{H}_{2}}OH\] respectively, is acting as a
A)
Reducing agent, oxidising agent done
clear
B)
Reducing agent, reducing agent done
clear
C)
Oxidising agent, oxidising agent done
clear
D)
Oxidising agent, reducing agent done
clear
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