11242 + Mcqs in Chemistry Page 55 McqOptions

2701.	Hypo is used in photography for [Roorkee 1989]
A.	Developing a picture
B.	Picture printing
C.	The colour of picture
D.	The fixation of the picture
Answer» B. Picture printing

Discussion

2702.	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.	\[S+HCl+N{{a}_{2}}S\]
B.	\[S+HCl+N{{a}_{2}}S{{O}_{4}}\]
C.	\[S+HCl+N{{a}_{2}}S{{O}_{3}}\]
D.	\[S+NaCl{{O}_{3}}+{{H}_{2}}O\]
Answer» C. \[S+HCl+N{{a}_{2}}S{{O}_{3}}\]

Discussion

2703.	Which of the following sulphate is insoluble in water [MP PMT 2000]
A.	\[{{H}_{2}}O,\]
B.	\[CdS{{O}_{4}}\]
C.	\[PbS{{O}_{4}}\]
D.	\[B{{i}_{2}}{{(S{{O}_{4}})}_{3}}\]
Answer» D. \[B{{i}_{2}}{{(S{{O}_{4}})}_{3}}\]

Discussion

2704.	There is no \[S-S\] bond in [IIT 1991; CPMT 1999; DCE 2000]
A.	\[{{S}_{2}}O_{4}^{2-}\]
B.	\[{{S}_{2}}O_{5}^{2-}\]
C.	\[{{S}_{2}}O_{3}^{2-}\]
D.	\[{{S}_{2}}O_{7}^{2-}\]
Answer» E.

Discussion

2705.	Oleum is [CBSE PMT 1991; MP PMT 2002; CPMT 2004]
A.	Castor oil
B.	Oil of vitriol
C.	Fuming \[{{H}_{2}}S{{O}_{4}}\]
D.	None of them
Answer» D. None of them

Discussion

2706.	Which one of the gas dissolves in \[{{H}_{2}}S{{O}_{4}}\] to give oleum [CPMT 1988]
A.	\[S{{O}_{2}}\]
B.	\[{{H}_{2}}S\]
C.	\[{{S}_{2}}O\]
D.	\[S{{O}_{3}}\]
Answer» E.

Discussion

2707.	Sulphur molecule is converted into sulphur ion, when it [DPMT 1980]
A.	Gains two electrons
B.	Loses two electrons
C.	Gains two protons
D.	Shares two electrons
Answer» B. Loses two electrons

Discussion

2708.	Which one is known as oil of vitriol [CPMT 1988; MP PMT 2004]
A.	\[{{H}_{2}}S{{O}_{3}}\]
B.	\[{{H}_{2}}S{{O}_{4}}\]
C.	\[{{H}_{2}}{{S}_{2}}{{O}_{7}}\]
D.	\[{{H}_{2}}{{S}_{2}}{{O}_{8}}\]
Answer» C. \[{{H}_{2}}{{S}_{2}}{{O}_{7}}\]

Discussion

2709.	Oxalic acid when heated with conc. \[{{H}_{2}}S{{O}_{4}},\] gives out [DPMT 1981; AFMC 1998]
A.	\[{{H}_{2}}O\] and \[C{{O}_{2}}\]
B.	\[CO\] and \[C{{O}_{2}}\]
C.	Oxalic sulphate
D.	\[C{{O}_{2}}\] and \[{{H}_{2}}S\]
Answer» C. Oxalic sulphate

Discussion

2710.	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
B.	Oxidising agent
C.	Reducing agent
D.	All of these
Answer» B. Oxidising agent

Discussion

2711.	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
B.	Oxidising agent
C.	Catalytic agent
D.	Dehydrating agent
Answer» C. Catalytic agent

Discussion

2712.	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.)
B.	\[{{H}_{2}}S{{O}_{4}}\] (dil.)
C.	\[{{H}_{2}}S{{O}_{4}}\]
D.	\[{{H}_{2}}{{S}_{2}}{{O}_{7}}\]
Answer» E.

Discussion

2713.	About \[{{H}_{2}}S{{O}_{4}}\] which is incorrect [CPMT 1985]
A.	Reducing agent
B.	Dehydrating agent
C.	Sulphonating agent
D.	Highly viscous
Answer» B. Dehydrating agent

Discussion

2714.	A salt of sulphurous acid is called [NCERT 1978]
A.	Sulphate
B.	Sulphurate
C.	Sulphite
D.	Sulphide
Answer» D. Sulphide

Discussion

2715.	Bleaching action of \[S{{O}_{2}}\] is due to [CPMT 1971, 79, 86]
A.	Reduction
B.	Oxidation
C.	Hydrolysis
D.	Its acidic nature
Answer» B. Oxidation

Discussion

2716.	Which of the following after burning at room temperature gives gaseous oxide [NCERT 1973; CPMT 1981; DPMT 1982; JIPMER 2001]
A.	H
B.	\[Na\]
C.	S
D.	\[He\]
Answer» D. \[He\]

Discussion

2717.	When \[S{{O}_{2}}\] is passed through cupric chloride solution [CPMT 1979, 81, 89, 94]
A.	A white precipitate is obtained
B.	The solution becomes colourless
C.	The solution becomes colourless and a white precipitate of \[C{{u}_{2}}C{{l}_{2}}\] is obtained
D.	No visible change takes place
Answer» D. No visible change takes place

Discussion

2718.	When \[S{{O}_{2}}\] is passed through acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution [CPMT 1989, 94]
A.	The solution turns blue
B.	The solution is decolourised
C.	\[S{{O}_{2}}\] is reduced
D.	Green \[C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\] is formed
Answer» E.

Discussion

2719.	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
B.	A reducing agent
C.	An acid
D.	A catalyst
Answer» B. A reducing agent

Discussion

2720.	Which compound acts as an oxidising as well as reducing agent [IIT 1991]
A.	\[S{{O}_{2}}\]
B.	\[Mn{{O}_{2}}\]
C.	\[A{{l}_{2}}{{O}_{3}}\]
D.	\[Cr{{O}_{3}}\]
Answer» B. \[Mn{{O}_{2}}\]

Discussion

2721.	Copper turnings when heated with concentrated sulphuric acid will give [AFMC 1987; BHU 1999; CBSE PMT 2000]
A.	\[S{{O}_{2}}\]
B.	\[S{{O}_{3}}\]
C.	\[{{H}_{2}}S\]
D.	\[{{O}_{2}}\]
Answer» B. \[S{{O}_{3}}\]

Discussion

2722.	When \[{{H}_{2}}S\] is passed through acidified \[KMn{{O}_{4}},\] we get [CPMT 1979, 91; MP PMT 1987]
A.	\[{{K}_{2}}S{{O}_{3}}\]
B.	\[Mn{{O}_{2}}\]
C.	\[KHS{{O}_{3}}\]
D.	Sulphur
Answer» E.

Discussion

2723.	No. of atoms in one molecule of sulphur is [AFMC 1987, 91; AMU 1985]
A.	8
B.	4
C.	3
D.	None of these
Answer» B. 4

Discussion

2724.	Ozone turns trimethyl paper [CPMT 1989]
A.	Green
B.	Violet
C.	Red
D.	Black
Answer» C. Red

Discussion

2725.	The gases respectively absorbed by alkaline pyrogallol and oil of cinnamon is [CBSE PMT 1989]
A.	\[{{O}_{3,}}\] \[C{{H}_{4}}\]
B.	\[{{O}_{2}},\] \[{{O}_{3}}\]
C.	\[S{{O}_{2}},\] \[C{{H}_{4}}\]
D.	\[{{N}_{2}}O,\] \[{{O}_{3}}\]
Answer» C. \[S{{O}_{2}},\] \[C{{H}_{4}}\]

Discussion

2726.	Ozone with \[KI\] solution produces [CPMT 1987]
A.	\[C{{l}_{2}}\]
B.	\[{{I}_{2}}\]
C.	HI
D.	\[I{{O}_{3}}\]
Answer» C. HI

Discussion

2727.	Which one of the following property is not correct for ozone [CPMT 1984]
A.	It oxidises lead sulphide
B.	It oxidises potassium iodide
C.	It oxidises mercury
D.	It cannot act as bleaching agent
Answer» E.

Discussion

2728.	Identify the incorrect statement with respect to ozone [AIIMS 1992]
A.	Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen
B.	Ozone is more reactive than oxygen
C.	Ozone is diamagnetic whereas dioxygen is paramagnetic
D.	Ozone protects the earth's inhabitants by absorbing \[\gamma \] radiations
Answer» E.

Discussion

2729.	Which of the following statement is true about ozone layer [NCERT 1980]
A.	It is harmful because ozone is dangerous to living organism
B.	It is beneficial because oxidation reaction can proceed faster in the presence of ozone
C.	It is beneficial because ozone cuts out the ultraviolet radiation of the sun
D.	It is harmful because ozone cuts out the important radiation of the sun which are vital for photosynthesis
Answer» D. It is harmful because ozone cuts out the important radiation of the sun which are vital for photosynthesis

Discussion

2730.	Ozone is obtained from oxygen [CPMT 1982]
A.	By oxidation at high temperature
B.	By oxidation using a catalyst
C.	By silent electric discharge
D.	By conversion at high pressure
Answer» D. By conversion at high pressure

Discussion

2731.	Oxygen does not react with [CBSE PMT 1989]
A.	\[P\]
B.	\[Na\]
C.	\[S\]
D.	\[Cl\]
Answer» E.

Discussion

2732.	When oxygen is passed through a solution of \[N{{a}_{2}}S{{O}_{3}}\] we get [CPMT 1979]
A.	\[N{{a}_{2}}S{{O}_{4}}\]
B.	\[N{{a}_{2}}S\]
C.	\[NaHS{{O}_{4}}\]
D.	\[NaH\]
Answer» B. \[N{{a}_{2}}S\]

Discussion

2733.	Which of the elements listed below occurs in allotropic forms [CPMT 1972]
A.	Iodine
B.	Copper
C.	Sulphur
D.	Silver
Answer» D. Silver

Discussion

2734.	Oxygen is denser than air so it is collected over [CPMT 1980; MP PET 1999]
A.	\[{{H}_{2}}O\]
B.	Ethanol
C.	Mercury
D.	Kerosene oil
Answer» B. Ethanol

Discussion

2735.	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
B.	Oxygen is more reactive than nitrogen
C.	Oxygen has higher b.p. than nitrogen
D.	Oxygen has a lower density than nitrogen
Answer» D. Oxygen has a lower density than nitrogen

Discussion

2736.	The compound which gives off oxygen on moderate heating is [IIT-JEE 1986; MP PMT 1991; MADT Bihar 1995]
A.	Cupric oxide
B.	Mercuric oxide
C.	Zinc oxide
D.	Aluminium oxide
Answer» C. Zinc oxide

Discussion

2737.	Oxygen was discovered by [BHU 1987]
A.	Priestley
B.	Boyle
C.	Scheele
D.	Cavandish
Answer» B. Boyle

Discussion

2738.	Which shows polymorphism [BHU 1982; MP PMT 1985]
A.	\[O\]
B.	\[S\]
C.	\[Se\]
D.	All the above
Answer» E.

Discussion

2739.	\[S{{O}_{2}}\] is obtained when [Roorkee 1995]
A.	Oxygen reacts with dilute sulphuric acid
B.	Hydrolysis of dilute \[{{H}_{2}}S{{O}_{4}}\]
C.	Concentrated \[{{H}_{2}}S{{O}_{4}}\] reacts with \[N{{a}_{2}}S{{O}_{3}}\]
D.	All of these
Answer» C. Concentrated \[{{H}_{2}}S{{O}_{4}}\] reacts with \[N{{a}_{2}}S{{O}_{3}}\]

Discussion

2740.	Which of the following is most electronegative [BHU 1978]
A.	\[O\]
B.	\[S\]
C.	\[Te\]
D.	\[Se\]
Answer» B. \[S\]

Discussion

2741.	\[S{{O}_{2}}+{{H}_{2}}S\to \]Product. the final product is [Orissa JEE 2005]
A.	\[{{H}_{2}}O+S\]
B.	\[{{H}_{2}}S{{O}_{4}}\]
C.	\[{{H}_{2}}S{{O}_{3}}\]
D.	\[{{H}_{2}}{{S}_{2}}{{O}_{3}}\]
Answer» B. \[{{H}_{2}}S{{O}_{4}}\]

Discussion

2742.	Ozone deplict due to the formation of following compound in Antarctica [Kerala CET 2005]
A.	Acrolein
B.	Peroxy acetyl nitrate
C.	\[S{{O}_{2}}\] and \[S{{O}_{3}}\]
D.	Chlorine nitrate
E.	Formaldehyde
Answer» E. Formaldehyde

Discussion

2743.	Sulphur in +3 oxidation state is present in [DCE 2003]
A.	Sulphurous acid
B.	Pyrosulphuric acid
C.	Dithionous acid
D.	Thiosulphuric acid
Answer» D. Thiosulphuric acid

Discussion

2744.	When \[Pb{{O}_{2}}\]reacts with conc. \[HN{{O}_{3}}\] the gas evolved is [IIT-JEE (Screening) 2005]
A.	\[N{{O}_{2}}\]
B.	\[{{O}_{2}}\]
C.	\[{{N}_{2}}\]
D.	\[{{N}_{2}}O\]
Answer» C. \[{{N}_{2}}\]

Discussion

2745.	Oxygen is not evolved on reaction of ozone with [Pb. PMT 2004]
A.	\[{{H}_{2}}{{O}_{2}}\]
B.	\[S{{O}_{2}}\]
C.	Hg
D.	KI
Answer» C. Hg

Discussion

2746.	The smog is essentially caused by the presence of [AIEEE 2004]
A.	Oxides of sulphur and nitrogen
B.	\[{{O}_{2}}\] and \[{{N}_{2}}\]
C.	\[{{O}_{2}}\]and \[{{O}_{3}}\]
D.	\[{{O}_{3}}\] and \[{{N}_{2}}\]
Answer» B. \[{{O}_{2}}\] and \[{{N}_{2}}\]

Discussion

2747.	Conc. \[{{H}_{2}}S{{O}_{4}}\]is diluted [Pb. CET 2001]
A.	By adding water in \[{{H}_{2}}S{{O}_{4}}\]
B.	By adding \[{{H}_{2}}S{{O}_{4}}\]in water
C.	By adding glacial acetic acid in \[{{H}_{2}}S{{O}_{4}}\]
D.	None of the above
Answer» C. By adding glacial acetic acid in \[{{H}_{2}}S{{O}_{4}}\]

Discussion

2748.	Most abundant element on earth is [MP PET/PMT 1988]
A.	\[O\]
B.	\[S\]
C.	\[Se\]
D.	\[Te\]
Answer» B. \[S\]

Discussion

2749.	Which element is found in Free State [CPMT 1972, 81, 91; DPMT 1986]
A.	Iodine
B.	Sulphur
C.	Phosphorus
D.	Magnesium
Answer» C. Phosphorus

Discussion

2750.	The reaction \[{{H}_{2}}S+{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+S\] shows [JIPMER 2001]
A.	Oxidizing action of \[{{H}_{2}}{{O}_{2}}\]
B.	Reducing action of \[{{H}_{2}}{{O}_{2}}\]
C.	Alkaline nature of \[{{H}_{2}}{{O}_{2}}\]
D.	Acidic nature of \[{{H}_{2}}{{O}_{2}}\]
Answer» B. Reducing action of \[{{H}_{2}}{{O}_{2}}\]

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Hypo is used in photography for [Roorkee 1989]

The products of the chemical reaction between \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\],\[C{{l}_{2}}\] and \[{{H}_{2}}O\] are [EAMCET 1989]

Which of the following sulphate is insoluble in water [MP PMT 2000]

There is no \[S-S\] bond in [IIT 1991; CPMT 1999; DCE 2000]

Oleum is [CBSE PMT 1991; MP PMT 2002; CPMT 2004]

Which one of the gas dissolves in \[{{H}_{2}}S{{O}_{4}}\] to give oleum [CPMT 1988]

Sulphur molecule is converted into sulphur ion, when it [DPMT 1980]

Which one is known as oil of vitriol [CPMT 1988; MP PMT 2004]

Oxalic acid when heated with conc. \[{{H}_{2}}S{{O}_{4}},\] gives out [DPMT 1981; AFMC 1998]

In the reaction \[HCOOH\xrightarrow{{{H}_{2}}S{{O}_{4}}}CO+{{H}_{2}}O\];\[{{H}_{2}}S{{O}_{4}}\]acts as [CPMT 1980]

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]

The final acid obtained during the manufacture of \[{{H}_{2}}S{{O}_{4}}\] by contact process is [SCRA 1991]

About \[{{H}_{2}}S{{O}_{4}}\] which is incorrect [CPMT 1985]

A salt of sulphurous acid is called [NCERT 1978]

Bleaching action of \[S{{O}_{2}}\] is due to [CPMT 1971, 79, 86]

Which of the following after burning at room temperature gives gaseous oxide [NCERT 1973; CPMT 1981; DPMT 1982; JIPMER 2001]

When \[S{{O}_{2}}\] is passed through cupric chloride solution [CPMT 1979, 81, 89, 94]

When \[S{{O}_{2}}\] is passed through acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution [CPMT 1989, 94]

A solution of sulphur dioxide in water reacts with \[{{H}_{2}}S\] precipitating sulphur. Here sulphur dioxide acts as [NCERT 1980; MP PMT 1994]

Which compound acts as an oxidising as well as reducing agent [IIT 1991]

Copper turnings when heated with concentrated sulphuric acid will give [AFMC 1987; BHU 1999; CBSE PMT 2000]

When \[{{H}_{2}}S\] is passed through acidified \[KMn{{O}_{4}},\] we get [CPMT 1979, 91; MP PMT 1987]

No. of atoms in one molecule of sulphur is [AFMC 1987, 91; AMU 1985]

Ozone turns trimethyl paper [CPMT 1989]

The gases respectively absorbed by alkaline pyrogallol and oil of cinnamon is [CBSE PMT 1989]

Ozone with \[KI\] solution produces [CPMT 1987]

Which one of the following property is not correct for ozone [CPMT 1984]

Identify the incorrect statement with respect to ozone [AIIMS 1992]

Which of the following statement is true about ozone layer [NCERT 1980]

Ozone is obtained from oxygen [CPMT 1982]

Oxygen does not react with [CBSE PMT 1989]

When oxygen is passed through a solution of \[N{{a}_{2}}S{{O}_{3}}\] we get [CPMT 1979]

Which of the elements listed below occurs in allotropic forms [CPMT 1972]

Oxygen is denser than air so it is collected over [CPMT 1980; MP PET 1999]

It is possible to obtain oxygen from air by fractional distillation because [CBSE PMT 1989]

The compound which gives off oxygen on moderate heating is [IIT-JEE 1986; MP PMT 1991; MADT Bihar 1995]

Oxygen was discovered by [BHU 1987]

Which shows polymorphism [BHU 1982; MP PMT 1985]

\[S{{O}_{2}}\] is obtained when [Roorkee 1995]

Which of the following is most electronegative [BHU 1978]

\[S{{O}_{2}}+{{H}_{2}}S\to \]Product. the final product is [Orissa JEE 2005]

Ozone deplict due to the formation of following compound in Antarctica [Kerala CET 2005]

Sulphur in +3 oxidation state is present in [DCE 2003]

When \[Pb{{O}_{2}}\]reacts with conc. \[HN{{O}_{3}}\] the gas evolved is [IIT-JEE (Screening) 2005]

Oxygen is not evolved on reaction of ozone with [Pb. PMT 2004]

The smog is essentially caused by the presence of [AIEEE 2004]

Conc. \[{{H}_{2}}S{{O}_{4}}\]is diluted [Pb. CET 2001]

Most abundant element on earth is [MP PET/PMT 1988]

Which element is found in Free State [CPMT 1972, 81, 91; DPMT 1986]

The reaction \[{{H}_{2}}S+{{H}_{2}}{{O}_{2}}\to 2{{H}_{2}}O+S\] shows [JIPMER 2001]