-
question_answer1)
Which element is found in Free State [CPMT 1972, 81, 91; DPMT 1986]
A)
Iodine done
clear
B)
Sulphur done
clear
C)
Phosphorus done
clear
D)
Magnesium done
clear
View Solution play_arrow
-
question_answer2)
Which of the elements listed below occurs in allotropic forms [CPMT 1972]
A)
Iodine done
clear
B)
Copper done
clear
C)
Sulphur done
clear
D)
Silver done
clear
View Solution play_arrow
-
question_answer3)
Which forms new compound in air [AFMC 1987]
A)
\[{{H}_{2}}O\] in air done
clear
B)
\[{{O}_{2}}\] in air done
clear
C)
\[{{N}_{2}}\] in air done
clear
D)
Phosphorus in air done
clear
View Solution play_arrow
-
question_answer4)
Which of the following after burning at room temperature gives gaseous oxide [NCERT 1973; CPMT 1981; DPMT 1982; JIPMER 2001]
A)
H done
clear
B)
\[Na\] done
clear
C)
S done
clear
D)
\[He\] done
clear
View Solution play_arrow
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question_answer5)
Sulphur molecule is converted into sulphur ion, when it [DPMT 1980]
A)
Gains two electrons done
clear
B)
Loses two electrons done
clear
C)
Gains two protons done
clear
D)
Shares two electrons done
clear
View Solution play_arrow
-
question_answer6)
The element which liberates oxygen gas from water is [MP PMT 1993]
A)
\[P\] done
clear
B)
\[Na\] done
clear
C)
\[F\] done
clear
D)
\[I\] done
clear
View Solution play_arrow
-
question_answer7)
The highest catenation ability is shown by [AIIMS 1983; MP PET 1993; CPMT 1997]
A)
Oxygen done
clear
B)
Sulphur done
clear
C)
Selenium done
clear
D)
Tellurium done
clear
View Solution play_arrow
-
question_answer8)
Ozone belongs to which group of the periodic table
A)
V group done
clear
B)
VI group done
clear
C)
VII group done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer9)
The number of unpaired electrons in the p-subshell of oxygen atom is [Kurukshetra CEE 1991]
A)
1 done
clear
B)
2 done
clear
C)
3 done
clear
D)
4 done
clear
View Solution play_arrow
-
question_answer10)
Most abundant element on earth is [MP PET/PMT 1988]
A)
\[O\] done
clear
B)
\[S\] done
clear
C)
\[Se\] done
clear
D)
\[Te\] done
clear
View Solution play_arrow
-
question_answer11)
Which of the following is most electronegative [BHU 1978]
A)
\[O\] done
clear
B)
\[S\] done
clear
C)
\[Te\] done
clear
D)
\[Se\] done
clear
View Solution play_arrow
-
question_answer12)
The ability of a substance to assume two or more crystalline structures is called [CBSE PMT 1989]
A)
Isomerism done
clear
B)
Polymorphism done
clear
C)
Isomorphism done
clear
D)
Amorphism done
clear
View Solution play_arrow
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question_answer13)
\[S{{O}_{2}}\] is obtained when [Roorkee 1995]
A)
Oxygen reacts with dilute sulphuric acid done
clear
B)
Hydrolysis of dilute \[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
Concentrated \[{{H}_{2}}S{{O}_{4}}\] reacts with \[N{{a}_{2}}S{{O}_{3}}\] done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer14)
Which shows polymorphism [BHU 1982; MP PMT 1985]
A)
\[O\] done
clear
B)
\[S\] done
clear
C)
\[Se\] done
clear
D)
All the above done
clear
View Solution play_arrow
-
question_answer15)
Bond angle is minimum for [DPMT 1990]
A)
\[{{H}_{2}}O\] done
clear
B)
\[{{H}_{2}}S\] done
clear
C)
\[{{H}_{2}}Se\] done
clear
D)
\[{{H}_{2}}Te\] done
clear
View Solution play_arrow
-
question_answer16)
Oxygen was discovered by [BHU 1987]
A)
Priestley done
clear
B)
Boyle done
clear
C)
Scheele done
clear
D)
Cavandish done
clear
View Solution play_arrow
-
question_answer17)
The compound which gives off oxygen on moderate heating is [IIT-JEE 1986; MP PMT 1991; MADT Bihar 1995]
A)
Cupric oxide done
clear
B)
Mercuric oxide done
clear
C)
Zinc oxide done
clear
D)
Aluminium oxide done
clear
View Solution play_arrow
-
question_answer18)
It is possible to obtain oxygen from air by fractional distillation because [CBSE PMT 1989]
A)
Oxygen is in a different group of the periodic table from nitrogen done
clear
B)
Oxygen is more reactive than nitrogen done
clear
C)
Oxygen has higher b.p. than nitrogen done
clear
D)
Oxygen has a lower density than nitrogen done
clear
View Solution play_arrow
-
question_answer19)
Oxygen is denser than air so it is collected over [CPMT 1980; MP PET 1999]
A)
\[{{H}_{2}}O\] done
clear
B)
Ethanol done
clear
C)
Mercury done
clear
D)
Kerosene oil done
clear
View Solution play_arrow
-
question_answer20)
Oxygen molecule exhibits [CPMT 1991, 99, 2002; AIIMS 1983; BHU 1986; NCERT 1980, 81; MP PMT 1985, 92; AFMC 2004]
A)
Paramagnetism done
clear
B)
Diamagnetism done
clear
C)
Ferromagnetism done
clear
D)
Ferrimagnetism done
clear
View Solution play_arrow
-
question_answer21)
When oxygen is passed through a solution of \[N{{a}_{2}}S{{O}_{3}}\] we get [CPMT 1979]
A)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
B)
\[N{{a}_{2}}S\] done
clear
C)
\[NaHS{{O}_{4}}\] done
clear
D)
\[NaH\] done
clear
View Solution play_arrow
-
question_answer22)
Oxygen does not react with [CBSE PMT 1989]
A)
\[P\] done
clear
B)
\[Na\] done
clear
C)
\[S\] done
clear
D)
\[Cl\] done
clear
View Solution play_arrow
-
question_answer23)
The formula of ozone is \[{{O}_{3}},\] it is [CPMT 1989, 91; Manipal MEE 1995; RPET 1999, 2000]
A)
An allotrope of oxygen done
clear
B)
Compound of oxygen done
clear
C)
Isotope of oxygen done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer24)
Ozone is obtained from oxygen [CPMT 1982]
A)
By oxidation at high temperature done
clear
B)
By oxidation using a catalyst done
clear
C)
By silent electric discharge done
clear
D)
By conversion at high pressure done
clear
View Solution play_arrow
-
question_answer25)
Which of the following statement is true about ozone layer [NCERT 1980]
A)
It is harmful because ozone is dangerous to living organism done
clear
B)
It is beneficial because oxidation reaction can proceed faster in the presence of ozone done
clear
C)
It is beneficial because ozone cuts out the ultraviolet radiation of the sun done
clear
D)
It is harmful because ozone cuts out the important radiation of the sun which are vital for photosynthesis done
clear
View Solution play_arrow
-
question_answer26)
Identify the incorrect statement with respect to ozone [AIIMS 1992]
A)
Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen done
clear
B)
Ozone is more reactive than oxygen done
clear
C)
Ozone is diamagnetic whereas dioxygen is paramagnetic done
clear
D)
Ozone protects the earth's inhabitants by absorbing \[\gamma \] radiations done
clear
View Solution play_arrow
-
question_answer27)
Which one of the following property is not correct for ozone [CPMT 1984]
A)
It oxidises lead sulphide done
clear
B)
It oxidises potassium iodide done
clear
C)
It oxidises mercury done
clear
D)
It cannot act as bleaching agent done
clear
View Solution play_arrow
-
question_answer28)
Ozone with \[KI\] solution produces [CPMT 1987]
A)
\[C{{l}_{2}}\] done
clear
B)
\[{{I}_{2}}\] done
clear
C)
HI done
clear
D)
\[I{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer29)
The gases respectively absorbed by alkaline pyrogallol and oil of cinnamon is [CBSE PMT 1989]
A)
\[{{O}_{3,}}\] \[C{{H}_{4}}\] done
clear
B)
\[{{O}_{2}},\] \[{{O}_{3}}\] done
clear
C)
\[S{{O}_{2}},\] \[C{{H}_{4}}\] done
clear
D)
\[{{N}_{2}}O,\] \[{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer30)
Ozone turns trimethyl paper [CPMT 1989]
A)
Green done
clear
B)
Violet done
clear
C)
Red done
clear
D)
Black done
clear
View Solution play_arrow
-
question_answer31)
No. of atoms in one molecule of sulphur is [AFMC 1987, 91; AMU 1985]
A)
8 done
clear
B)
4 done
clear
C)
3 done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer32)
When \[{{H}_{2}}S\] is passed through acidified \[KMn{{O}_{4}},\] we get [CPMT 1979, 91; MP PMT 1987]
A)
\[{{K}_{2}}S{{O}_{3}}\] done
clear
B)
\[Mn{{O}_{2}}\] done
clear
C)
\[KHS{{O}_{3}}\] done
clear
D)
Sulphur done
clear
View Solution play_arrow
-
question_answer33)
Copper turnings when heated with concentrated sulphuric acid will give [AFMC 1987; BHU 1999; CBSE PMT 2000]
A)
\[S{{O}_{2}}\] done
clear
B)
\[S{{O}_{3}}\] done
clear
C)
\[{{H}_{2}}S\] done
clear
D)
\[{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer34)
Which of the following is used to absorb sulphur dioxide [EAMCET 1980]
A)
Conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[KOH\] solution done
clear
C)
Water done
clear
D)
Anhydrous \[CaC{{l}_{2}}\] done
clear
View Solution play_arrow
-
question_answer35)
Which compound acts as an oxidising as well as reducing agent [IIT 1991]
A)
\[S{{O}_{2}}\] done
clear
B)
\[Mn{{O}_{2}}\] done
clear
C)
\[A{{l}_{2}}{{O}_{3}}\] done
clear
D)
\[Cr{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer36)
A solution of sulphur dioxide in water reacts with \[{{H}_{2}}S\] precipitating sulphur. Here sulphur dioxide acts as [NCERT 1980; MP PMT 1994]
A)
An oxidising agent done
clear
B)
A reducing agent done
clear
C)
An acid done
clear
D)
A catalyst done
clear
View Solution play_arrow
-
question_answer37)
When \[S{{O}_{2}}\] is passed through acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution [CPMT 1989, 94]
A)
The solution turns blue done
clear
B)
The solution is decolourised done
clear
C)
\[S{{O}_{2}}\] is reduced done
clear
D)
Green \[C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\] is formed done
clear
View Solution play_arrow
-
question_answer38)
When \[S{{O}_{2}}\] is passed through cupric chloride solution [CPMT 1979, 81, 89, 94]
A)
A white precipitate is obtained done
clear
B)
The solution becomes colourless done
clear
C)
The solution becomes colourless and a white precipitate of \[C{{u}_{2}}C{{l}_{2}}\] is obtained done
clear
D)
No visible change takes place done
clear
View Solution play_arrow
-
question_answer39)
Which of the following is oxidised by \[S{{O}_{2}}\] [BHU 1986]
A)
\[Mg\] done
clear
B)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] done
clear
C)
\[KMn{{O}_{4}}\] done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer40)
Bleaching action of \[S{{O}_{2}}\] is due to [CPMT 1971, 79, 86]
A)
Reduction done
clear
B)
Oxidation done
clear
C)
Hydrolysis done
clear
D)
Its acidic nature done
clear
View Solution play_arrow
-
question_answer41)
A salt of sulphurous acid is called [NCERT 1978]
A)
Sulphate done
clear
B)
Sulphurate done
clear
C)
Sulphite done
clear
D)
Sulphide done
clear
View Solution play_arrow
-
question_answer42)
Which of the following is acidic [AFMC 1990; JIPMER 1997]
A)
\[S{{O}_{3}}\] done
clear
B)
\[{{N}_{2}}O\] done
clear
C)
\[BeO\] done
clear
D)
\[HgO\] done
clear
View Solution play_arrow
-
question_answer43)
The final acid obtained during the manufacture of \[{{H}_{2}}S{{O}_{4}}\] by contact process is [SCRA 1991]
A)
\[{{H}_{2}}S{{O}_{4}}\] (conc.) done
clear
B)
\[{{H}_{2}}S{{O}_{4}}\] (dil.) done
clear
C)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[{{H}_{2}}{{S}_{2}}{{O}_{7}}\] done
clear
View Solution play_arrow
-
question_answer44)
About \[{{H}_{2}}S{{O}_{4}}\] which is incorrect [CPMT 1985]
A)
Reducing agent done
clear
B)
Dehydrating agent done
clear
C)
Sulphonating agent done
clear
D)
Highly viscous done
clear
View Solution play_arrow
-
question_answer45)
In the reaction \[2Ag+2{{H}_{2}}S{{O}_{4}}\to A{{g}_{2}}S{{O}_{4}}+2{{H}_{2}}O+S{{O}_{2}}\] \[{{H}_{2}}S{{O}_{4}}\]acts as [CPMT 1981]
A)
Reducing agent done
clear
B)
Oxidising agent done
clear
C)
Catalytic agent done
clear
D)
Dehydrating agent done
clear
View Solution play_arrow
-
question_answer46)
In the reaction \[HCOOH\xrightarrow{{{H}_{2}}S{{O}_{4}}}CO+{{H}_{2}}O\];\[{{H}_{2}}S{{O}_{4}}\]acts as [CPMT 1980]
A)
Dehydrating agent done
clear
B)
Oxidising agent done
clear
C)
Reducing agent done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer47)
When conc. \[{{H}_{2}}S{{O}_{4}}\] comes in contact with sugar, it becomes black due to [CPMT 1989; BHU 1986; MDAT Bihar 1980]
A)
Hydrolysis done
clear
B)
Hydration done
clear
C)
Decolourisation done
clear
D)
Dehydration done
clear
View Solution play_arrow
-
question_answer48)
Oxalic acid when heated with conc. \[{{H}_{2}}S{{O}_{4}},\] gives out [DPMT 1981; AFMC 1998]
A)
\[{{H}_{2}}O\] and \[C{{O}_{2}}\] done
clear
B)
\[CO\] and \[C{{O}_{2}}\] done
clear
C)
Oxalic sulphate done
clear
D)
\[C{{O}_{2}}\] and \[{{H}_{2}}S\] done
clear
View Solution play_arrow
-
question_answer49)
Which one is known as oil of vitriol [CPMT 1988; MP PMT 2004]
A)
\[{{H}_{2}}S{{O}_{3}}\] done
clear
B)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
\[{{H}_{2}}{{S}_{2}}{{O}_{7}}\] done
clear
D)
\[{{H}_{2}}{{S}_{2}}{{O}_{8}}\] done
clear
View Solution play_arrow
-
question_answer50)
The acid used in lead storage cells is [NCERT 1971; Roorkee 1989]
A)
Phosphoric acid done
clear
B)
Nitric acid done
clear
C)
Sulphuric acid done
clear
D)
Hydrochloric acid done
clear
View Solution play_arrow
-
question_answer51)
Which one of the gas dissolves in \[{{H}_{2}}S{{O}_{4}}\] to give oleum [CPMT 1988]
A)
\[S{{O}_{2}}\] done
clear
B)
\[{{H}_{2}}S\] done
clear
C)
\[{{S}_{2}}O\] done
clear
D)
\[S{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer52)
Oleum is [CBSE PMT 1991; MP PMT 2002; CPMT 2004]
A)
Castor oil done
clear
B)
Oil of vitriol done
clear
C)
Fuming \[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
None of them done
clear
View Solution play_arrow
-
question_answer53)
There is no \[S-S\] bond in [IIT 1991; CPMT 1999; DCE 2000]
A)
\[{{S}_{2}}O_{4}^{2-}\] done
clear
B)
\[{{S}_{2}}O_{5}^{2-}\] done
clear
C)
\[{{S}_{2}}O_{3}^{2-}\] done
clear
D)
\[{{S}_{2}}O_{7}^{2-}\] done
clear
View Solution play_arrow
-
question_answer54)
Which of the following sulphate is insoluble in water [MP PMT 2000]
A)
\[{{H}_{2}}O,\] done
clear
B)
\[CdS{{O}_{4}}\] done
clear
C)
\[PbS{{O}_{4}}\] done
clear
D)
\[B{{i}_{2}}{{(S{{O}_{4}})}_{3}}\] done
clear
View Solution play_arrow
-
question_answer55)
When sulphur is boiled with \[N{{a}_{2}}S{{O}_{3}}\] solution, the compound formed is [CPMT 1979; Roorkee 1992]
A)
Sodium sulphide done
clear
B)
Sodium sulphate done
clear
C)
Sodium persulphate done
clear
D)
Sodium thiosulphate done
clear
View Solution play_arrow
-
question_answer56)
The products of the chemical reaction between \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\],\[C{{l}_{2}}\] and \[{{H}_{2}}O\] are [EAMCET 1989]
A)
\[S+HCl+N{{a}_{2}}S\] done
clear
B)
\[S+HCl+N{{a}_{2}}S{{O}_{4}}\] done
clear
C)
\[S+HCl+N{{a}_{2}}S{{O}_{3}}\] done
clear
D)
\[S+NaCl{{O}_{3}}+{{H}_{2}}O\] done
clear
View Solution play_arrow
-
question_answer57)
Hypo is used in photography for [Roorkee 1989]
A)
Developing a picture done
clear
B)
Picture printing done
clear
C)
The colour of picture done
clear
D)
The fixation of the picture done
clear
View Solution play_arrow
-
question_answer58)
Hypo is used in photography to [CBSE PMT 1988; Pb. CET 1989]
A)
Reduce \[AgBr\] grains to metallic silver done
clear
B)
Convert the metallic silver to silver salt done
clear
C)
Remove undecomposed silver bromide as a soluble complex done
clear
D)
Remove reduced silver done
clear
View Solution play_arrow
-
question_answer59)
Hypo is used in photography because of its [IIT 1981; EAMCET 1988; MADT Bihar 1995]
A)
Reducing behaviour done
clear
B)
Oxidising behaviour done
clear
C)
Complex forming behaviour done
clear
D)
Reaction with light done
clear
View Solution play_arrow
-
question_answer60)
Aqueous solutions of hydrogen sulphide and sulphur dioxide when mixed together, yield [KCET 2002]
A)
Sulphur and water done
clear
B)
Sulphur trioxide and water done
clear
C)
Hydrogen peroxide and sulphur done
clear
D)
Hydrogen and sulphurous acid done
clear
View Solution play_arrow
-
question_answer61)
An example of a neutral oxide is [KCET 2003]
A)
\[NO\] done
clear
B)
\[C{{O}_{2}}\] done
clear
C)
\[CaO\] done
clear
D)
\[ZnO\] done
clear
View Solution play_arrow
-
question_answer62)
Which of the following is the best scientific method to test presence of water in a liquid [AIIMS 1999]
A)
Taste done
clear
B)
Smell done
clear
C)
Use of litmus paper done
clear
D)
Use of anhydrous copper sulphate done
clear
View Solution play_arrow
-
question_answer63)
\[{{H}_{2}}S\] react with \[{{O}_{2}}\] to form [AFMC 1995]
A)
\[{{H}_{2}}O+S\] done
clear
B)
\[{{H}_{2}}O+S{{O}_{2}}\] done
clear
C)
\[{{H}_{2}}O+S{{O}_{3}}\] done
clear
D)
\[{{H}_{2}}S{{O}_{4}}+S\] done
clear
View Solution play_arrow
-
question_answer64)
Which of the following mixture is chromic acid [Pb. PMT 2000]
A)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] and \[HCl\] done
clear
C)
\[{{K}_{2}}S{{O}_{4}}\] and conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[{{H}_{2}}S{{O}_{4}}\] and \[HCl\] done
clear
View Solution play_arrow
-
question_answer65)
At room temperature \[{{H}_{2}}O\] is a liquid while \[{{H}_{2}}S\] is a gas. The reason is [RPET 1999]
A)
Electronegativity of O is greater than S done
clear
B)
Difference in the bond angles of both the molecules done
clear
C)
Association takes place in \[{{H}_{2}}O\] due to H-bonding while no H- bonding in \[{{H}_{2}}S\] done
clear
D)
O and S belong to different periods done
clear
View Solution play_arrow
-
question_answer66)
Which of the following products is formed on boiling tin with an alkali solution [Roorkee 2000]
A)
\[Sn{{(OH)}_{2}}\] done
clear
B)
\[Sn{{(OH)}_{4}}\] done
clear
C)
\[SnO_{3}^{2-}\] done
clear
D)
\[Sn{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer67)
Amongst \[{{H}_{2}}O,\] \[{{H}_{2}}S,\] \[{{H}_{2}}Se\] and \[{{H}_{2}}Te\] the one with the highest boiling point is [IIT-JEE (Screening) 2000]
A)
\[{{H}_{2}}O\] because of hydrogen bonding done
clear
B)
\[{{H}_{2}}\]Te because of higher molecular weight done
clear
C)
\[{{H}_{2}}S\] because of hydrogen bonding done
clear
D)
\[{{H}_{2}}Se\] because of lower molecular weight done
clear
View Solution play_arrow
-
question_answer68)
Among the hydrides formed by the group VI-A elements, only \[{{H}_{2}}O\] has an abnormally low volatility (high boiling point). This is so because
A)
\[{{H}_{2}}O\] molecules are associated due to intermolecular hydrogen bonds done
clear
B)
\[{{H}_{2}}O\] is covalent in nature done
clear
C)
The \[O-H\] bond in \[{{H}_{2}}O\] is very strong done
clear
D)
The electronegativity difference of \[H\] and \[O\] is very large done
clear
View Solution play_arrow
-
question_answer69)
Sulphuric acid reacts with \[PC{{l}_{5}}\] to give [KCET 1996; JIPMER 2000]
A)
Thionyl chloride done
clear
B)
Sulphur monochloride done
clear
C)
Sulphuryl chloride done
clear
D)
Sulphur tetrachloride done
clear
View Solution play_arrow
-
question_answer70)
Carbogen is [EAMCET 1998]
A)
Pure form of carbon done
clear
B)
\[COC{{l}_{2}}\] done
clear
C)
Mixture of \[CO\] and \[C{{O}_{2}}\] done
clear
D)
Mixture of \[{{O}_{2}}\] and \[C{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer71)
Which of the following dissociates to give \[{{H}^{+}}\] most easily [MP PET 1994]
A)
\[{{H}_{2}}O\] done
clear
B)
\[{{H}_{2}}S\] done
clear
C)
\[{{H}_{2}}Te\] done
clear
D)
\[{{H}_{2}}Se\] done
clear
View Solution play_arrow
-
question_answer72)
Superphosphate is the mixture of [CPMT 1993]
A)
Calcium phosphate and dil. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
Sodium phosphate and dil. \[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
Potassium phosphate and dil. \[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer73)
Among \[K{{O}_{2}},\] \[NO_{2}^{-},\] \[Ba{{O}_{2}}\] and \[NO_{2}^{+}\] unpaired electron is present in [IIT 1997]
A)
\[NO_{2}^{+}\] and \[Ba{{O}_{2}}\] done
clear
B)
\[K{{O}_{2}}\] and \[Ba{{O}_{2}}\] done
clear
C)
\[K{{O}_{2}}\] only done
clear
D)
\[Ba{{O}_{2}}\] only done
clear
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-
question_answer74)
Which is not easily soluble in water [CPMT 1994]
A)
\[{{H}_{2}}\] done
clear
B)
\[{{O}_{2}}\] done
clear
C)
\[S{{O}_{2}}\] done
clear
D)
\[C{{O}_{2}}\] done
clear
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-
question_answer75)
Point out in which of the following properties oxygen differs from the rest of the members of its family (Group-VIA) [MP PMT 1997]
A)
High value of ionisation energies done
clear
B)
Oxidation states (2, 4, 6) done
clear
C)
Polymorphism done
clear
D)
Formation of hydrides done
clear
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-
question_answer76)
In the preparation of sulphuric acid, \[C{{a}^{2+}},\,NO_{3}^{-}\] is used in the reaction, which is [CBSE PMT 2001; AFMC 2001]
A)
\[S+{{O}_{2}}\to S{{O}_{2}}\] done
clear
B)
\[2S{{O}_{2}}+{{O}_{2}}\to 2S{{O}_{3}}\] done
clear
C)
\[S{{O}_{2}}+{{H}_{2}}O\to {{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\] done
clear
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-
question_answer77)
Which of the following hydrides has the lowest boiling point [MP PET 1997]
A)
\[{{H}_{2}}O\] done
clear
B)
\[{{H}_{2}}S\] done
clear
C)
\[{{H}_{2}}Se\] done
clear
D)
\[{{H}_{2}}Te\] done
clear
View Solution play_arrow
-
question_answer78)
The catalyst used in the manufacture of \[{{H}_{2}}S{{O}_{4}}\] by contact process is [UPSEAT 1999]
A)
\[A{{l}_{2}}{{O}_{3}}\] done
clear
B)
\[C{{r}_{2}}{{O}_{3}}\] done
clear
C)
\[{{V}_{2}}{{O}_{5}}\] done
clear
D)
\[Mn{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer79)
The molecular formula of sulphur is [MP PMT 1996; MP PET/PMT 1998]
A)
\[S\] done
clear
B)
\[{{S}_{2}}\] done
clear
C)
\[{{S}_{4}}\] done
clear
D)
\[{{S}_{8}}\] done
clear
View Solution play_arrow
-
question_answer80)
Which of the following is not suitable for use in a descicator to dry substances [AIIMS 1996]
A)
Conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[N{{a}_{2}}S{{O}_{4}}\] done
clear
C)
\[CaC{{l}_{2}}\] done
clear
D)
\[{{P}_{4}}{{O}_{10}}\] done
clear
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-
question_answer81)
Which shows polymorphism [DCE 2000]
A)
O done
clear
B)
S done
clear
C)
Se done
clear
D)
All done
clear
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-
question_answer82)
All the elements of oxygen family are [MP PET/PMT 1998]
A)
Non-metals done
clear
B)
Metalloids done
clear
C)
Radioactive done
clear
D)
Polymorphic done
clear
View Solution play_arrow
-
question_answer83)
The triatomic species of elemental oxygen is known as [Kerala (Med.) 2002]
A)
Azone done
clear
B)
Polyzone done
clear
C)
Triozone done
clear
D)
Ozone done
clear
View Solution play_arrow
-
question_answer84)
When \[{{H}_{2}}S\] gas is passed through nitric acid, the product is [Kerala (Engg.) 2002]
A)
Rhombic S done
clear
B)
Prismatic S done
clear
C)
Amorphous S done
clear
D)
Monoclinic S done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer85)
Shape of \[{{O}_{2}}{{F}_{2}}\] is similar to that of [AIIMS 2004]
A)
\[{{C}_{2}}{{F}_{2}}\] done
clear
B)
\[{{H}_{2}}{{O}_{2}}\] done
clear
C)
\[{{H}_{2}}{{F}_{2}}\] done
clear
D)
\[{{C}_{2}}{{H}_{2}}\] done
clear
View Solution play_arrow
-
question_answer86)
Which of the following bonds has the highest energy [CBSE PMT 1996]
A)
\[Se-Se\] done
clear
B)
\[Te-Te\] done
clear
C)
\[S-S\] done
clear
D)
\[O-O\] done
clear
View Solution play_arrow
-
question_answer87)
Which of the following is not a chalcogen [CPMT 1999]
A)
O done
clear
B)
S done
clear
C)
Se done
clear
D)
Na done
clear
View Solution play_arrow
-
question_answer88)
Which of the following is a suboxide [DPMT 2001]
A)
\[B{{a}_{2}}O\] done
clear
B)
\[CaC{{O}_{3}}\] done
clear
C)
\[{{C}_{3}}{{O}_{2}}\] done
clear
D)
\[ZnO\] done
clear
View Solution play_arrow
-
question_answer89)
In the manufacture of sulphuric acid by contact process, Tyndall box is used to [KCET 2003]
A)
Filter dust particles done
clear
B)
Remove impurities done
clear
C)
Convert \[S{{O}_{2}}\] to \[S{{O}_{3}}\] done
clear
D)
Test the presence of dust particles done
clear
View Solution play_arrow
-
question_answer90)
Permono sulphuric acid is known as [Bihar CEE 1995]
A)
Marshell's acid done
clear
B)
Caro's acid done
clear
C)
Sulphuric acid done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer91)
\[K{{O}_{2}}+C{{O}_{2}}\to ?\] (gas) [CPMT 1997]
A)
\[{{H}_{2}}\] done
clear
B)
\[{{N}_{2}}\] done
clear
C)
\[{{O}_{2}}\] done
clear
D)
\[CO\] done
clear
View Solution play_arrow
-
question_answer92)
\[{{H}_{2}}S{{O}_{4}}\] acts as dehydrating agent in its reaction with [JIPMER 2001]
A)
\[{{H}_{2}}{{C}_{2}}{{O}_{4}}\] done
clear
B)
\[Ba{{(OH)}_{2}}\] done
clear
C)
\[KOH\] done
clear
D)
\[Zn\] done
clear
View Solution play_arrow
-
question_answer93)
Which of the following group shows the highest boiling point [MP PET 2002]
A)
\[{{H}_{2}}O\] done
clear
B)
\[{{H}_{2}}S\] done
clear
C)
\[{{H}_{2}}Se\] done
clear
D)
\[{{H}_{2}}Te\] done
clear
View Solution play_arrow
-
question_answer94)
In presence of moisture, \[S{{O}_{2}}\] can [BVP 2003]
A)
Act as oxidant done
clear
B)
Lose electron done
clear
C)
Gain electron done
clear
D)
Not act as reductant done
clear
View Solution play_arrow
-
question_answer95)
A gas that cannot be collected over water is [Kurukshetra CEE 1998]
A)
\[{{N}_{2}}\] done
clear
B)
\[{{O}_{2}}\] done
clear
C)
\[S{{O}_{2}}\] done
clear
D)
\[P{{H}_{3}}\] done
clear
View Solution play_arrow
-
question_answer96)
Which of the following is formed by the action of water on sodium peroxide [Pb. PMT 1999]
A)
\[{{H}_{2}}\] done
clear
B)
\[{{N}_{2}}\] done
clear
C)
\[{{O}_{2}}\] done
clear
D)
\[C{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer97)
Sulphur on boiling with \[NaOH\] solution gives [Roorkee 1999]
A)
\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}+NaHS{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}+N{{a}_{2}}S\] done
clear
C)
\[N{{a}_{2}}S{{O}_{3}}\]\[+{{H}_{2}}S\] done
clear
D)
\[N{{a}_{2}}S{{O}_{3}}+S{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer98)
Quartz is a crystalline variety of [Pb. CET 2002; Pb. PMT 2000, 04]
A)
Silicon carbide done
clear
B)
Sodium silicate done
clear
C)
Silica done
clear
D)
Silicon done
clear
View Solution play_arrow
-
question_answer99)
The most efficient agent for the absorption of \[S{{O}_{3}}\] is [BHU 2004; DPMT 2004]
A)
\[80%\ {{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[98%\ {{H}_{2}}S{{O}_{4}}\] done
clear
C)
\[50%\ {{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[20%\ {{H}_{2}}{{S}_{2}}{{O}_{7}}\] done
clear
View Solution play_arrow
-
question_answer100)
Conc. \[{{H}_{2}}S{{O}_{4}}\]is diluted [Pb. CET 2001]
A)
By adding water in \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
By adding \[{{H}_{2}}S{{O}_{4}}\]in water done
clear
C)
By adding glacial acetic acid in \[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
None of the above done
clear
View Solution play_arrow
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question_answer101)
The smog is essentially caused by the presence of [AIEEE 2004]
A)
Oxides of sulphur and nitrogen done
clear
B)
\[{{O}_{2}}\] and \[{{N}_{2}}\] done
clear
C)
\[{{O}_{2}}\]and \[{{O}_{3}}\] done
clear
D)
\[{{O}_{3}}\] and \[{{N}_{2}}\] done
clear
View Solution play_arrow
-
question_answer102)
Bleaching action of \[S{{O}_{2}}\] is due to its [CPMT 2004]
A)
Oxidising property done
clear
B)
Acidic property done
clear
C)
Basic property done
clear
D)
Reducing property done
clear
View Solution play_arrow
-
question_answer103)
Oxygen is not evolved on reaction of ozone with [Pb. PMT 2004]
A)
\[{{H}_{2}}{{O}_{2}}\] done
clear
B)
\[S{{O}_{2}}\] done
clear
C)
Hg done
clear
D)
KI done
clear
View Solution play_arrow
-
question_answer104)
When \[Pb{{O}_{2}}\]reacts with conc. \[HN{{O}_{3}}\] the gas evolved is [IIT-JEE (Screening) 2005]
A)
\[N{{O}_{2}}\] done
clear
B)
\[{{O}_{2}}\] done
clear
C)
\[{{N}_{2}}\] done
clear
D)
\[{{N}_{2}}O\] done
clear
View Solution play_arrow
-
question_answer105)
Sulphur in +3 oxidation state is present in [DCE 2003]
A)
Sulphurous acid done
clear
B)
Pyrosulphuric acid done
clear
C)
Dithionous acid done
clear
D)
Thiosulphuric acid done
clear
View Solution play_arrow
-
question_answer106)
\[S{{O}_{2}}+{{H}_{2}}S\to \]Product. the final product is [Orissa JEE 2005]
A)
\[{{H}_{2}}O+S\] done
clear
B)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
\[{{H}_{2}}S{{O}_{3}}\] done
clear
D)
\[{{H}_{2}}{{S}_{2}}{{O}_{3}}\] done
clear
View Solution play_arrow
-
question_answer107)
On controlled hydrolysis and condensation, \[{{R}_{3}}SiCl\] yields [Orissa JEE 2005]
A)
\[{{R}_{3}}Si-O-Si{{R}_{3}}\] done
clear
B)
(\[\,{{R}_{3}}Si-O-Si{{R}_{3}}\,\])n done
clear
C)
\[{{R}_{3}}SiOH\] done
clear
D)
\[\overset{R\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,R}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}{\mathop{\overset{-Si\,\,-\,O\,\,-Si\,-}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,}{\mathop{\underset{-Si-O-Si-}{\mathop{\underset{O\,\,\,\,\,\,\,\,\,\,\,\,\,\,O}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|}}\,}}\,}}\,}}\,}}\,}}\,\] done
clear
View Solution play_arrow
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question_answer108)
Ozone deplict due to the formation of following compound in Antarctica [Kerala CET 2005]
A)
Acrolein done
clear
B)
Peroxy acetyl nitrate done
clear
C)
\[S{{O}_{2}}\] and \[S{{O}_{3}}\] done
clear
D)
Chlorine nitrate done
clear
E)
Formaldehyde done
clear
View Solution play_arrow