Explore topic-wise MCQs in Chemistry.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

A solution of 10 ml \[\frac{M}{10}FeS{{O}_{4}}\]was titrated with \[KMn{{O}_{4}}\]solution in acidic medium. The amount of \[KMn{{O}_{4}}\]used will be [CPMT 1984]

A. 5 ml of 0.1 M
B. 10 ml of 1.1 M
C. 10 ml of 0.5 M
D. 10 ml of 0.02 M
Answer» E.
Discussion
2.

A compound possesses 8% sulphur by mass. The least molecular mass is  [AIIMS 2002]

A. 200
B. 400
C. 155
D. 355
Answer» C. 155
Discussion
3.

Mixture of sand and sulphur may best be separated by [Kerala CET2001]

A. Fractional crystallisation from aqueous solution
B. Magnetic method
C. Fractional distillation
D. Dissolving in \[C{{S}_{2}}\] and filtering
Answer» E.
Discussion
4.

The ratio of the molar amounts of \[{{H}_{2}}S\] needed to precipitate the metal ions from \[20mL\] each of \[1M\ Cd{{(N{{O}_{3}})}_{2}}\] and \[0.5M\ CuS{{O}_{4}}\] is  [CPMT 1997]

A. 0.042361111111111
B. 0.084027777777778
C. 0.043055555555556
D. Indefinite
Answer» C. 0.043055555555556
Discussion
5.

Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (At. wt. of Fe = 56) present in one molecule of haemoglobin is [CBSE PMT 1998]

A. 6
B. 1
C. 4
D. 2
Answer» D. 2
Discussion
6.

On electrical decomposition of 150 ml dry and pure \[{{O}_{2}}\], 10% of \[{{O}_{2}}\]gets changed to O, then the volume of gaseous mixture after reaction and volume of remaining gas left after passing in turpentine oil will be

A. 145 ml
B. 149 ml
C. 128 ml
D. 125 ml
Answer» B. 149 ml
Discussion
7.

An electric discharge is passed through a mixture containing 50 c.c. of \[{{O}_{2}}\]and 50 c.c. of \[{{H}_{2}}\]. The volume of the gases formed (i) at room temperature and (ii) at 1100C will be

A. (i) 25 c.c. (ii) 50 c.c.
B. (i) 50 c.c. (ii) 75 c.c.
C. (i) 25 c.c. (ii) 75 c.c.
D. (i) 75 c.c. (ii) 75 c.c.
Answer» D. (i) 75 c.c. (ii) 75 c.c.
Discussion
8.

Which of the following cannot give iodometric titrations [AIIMS 1997]

A. \[F{{e}^{3+}}\]
B. \[C{{u}^{2+}}\]
C. \[P{{b}^{2+}}\]
D. \[A{{g}^{+}}\]
Answer» D. \[A{{g}^{+}}\]
Discussion
9.

When 100 ml of 1\[M\,NaOH\]solution and 10 ml of 10\[N\,{{H}_{2}}S{{O}_{4}}\]solution are mixed together, the resulting solution will be  [DPMT 1982]

A. Alkaline
B. Acidic
C. Strongly acidic
D. Neutral
Answer» E.
Discussion
10.

Equivalent weight of a bivalent metal is 37.2. The molecular weight of its chloride is  [MH CET 2003]

A. 412.2
B. 216
C. 145.4
D. 108.2
Answer» D. 108.2
Discussion
11.

The number of molecules in \[8.96\ L\] of a gas at \[{{0}^{o}}C\] and 1 atmosphere pressure is approximately [BHU 1993]

A. \[6.02\times {{10}^{23}}\]
B. \[12.04\times {{10}^{23}}\]
C. \[18.06\times {{10}^{23}}\]
D. \[24.08\times {{10}^{22}}\]
Answer» E.
Discussion
12.

Which of the following has least mass  [Pb. PET1985]

A. \[2\ g\] atom of nitrogen
B. \[3\times {{10}^{23}}\] atoms of \[C\]
C. 1 mole of \[S\]
D. \[7.0\ g\] of \[Ag\]
Answer» C. 1 mole of \[S\]
Discussion
13.

The element whose a atom has mass of \[10.86\times {{10}^{-26}}\]kg is

A. Boron
B. Calcium
C. Silver
D. Zinc
Answer» E.
Discussion
14.

What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene[CBSE PMT 1989]

A. 2.8 kg
B. 6.4 kg
C. 9.6 kg
D. 96 kg
Answer» C. 9.6 kg
Discussion
15.

The number of molecule at NTP in 1 ml of an ideal gas will be

A. \[6\times {{10}^{23}}\]
B. \[2.69\times {{10}^{19}}\]
C. \[2.69\times {{10}^{23}}\]
D. None of these
Answer» C. \[2.69\times {{10}^{23}}\]
Discussion
16.

1.520 g of the hydroxide of a metal on ignition gave0.995 gm of oxide. The equivalent weight of metal is [DPMT 1984]

A. 1.52
B. 0.995
C. 19
D. 9
Answer» E.
Discussion