chemistry MCQs – Page 6

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
101. Which of the following is not a fatty acid ?
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A. Acetic acid

B. Propanoic acid

C. Phthalic acid

D. Butanoic acid

102. The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?
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A. Liquid

B. Volatile solid

C. All

D. Gas
103. Which of the following can be used as anti-knocking agent ?
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A. (C2H5)2 Pb

B. all of the above

C. PbCl2

D. (C2H5)4 Pb
104. Combustion analysis is performed to determine__________________?
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A. Formula mass

B. Molecular formula

C. Empirical formula

D. Molecular mass

105. Acid present in acid rain may be_________________?
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A. H2SO4

B. HNO3

C. both A and B

D. none of the above

106. The type of filtering media used for filtration depending upon____________________?
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A. Nature of reactants

B. Nature of product

C. Nature of precipitate

D. Nature of crucible

107. Percentage of calcium in calcium carbonate is___________________?
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A. 30%

B. 80%

C. 40%

D. 20%

108. At which electrode the reduction of the solution is occurring in Al-Ag cell_____________?
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A. Both

B. Ag

C. A

D. Neither

109. Chemical composition of cinnabar is____________________?
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A. ZnS

B. PbS

C. HgS

D. FeS2

110. On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
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A. yellow

B. pink

C. black

D. brick red
111. As a substance moves from a solid to a liquid all of the following changes occur except ?
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A. molecules become more disordered.

B. K.E of the molecules decreases

C. molecules move more frequently.

D. intermolecular forces become weaker.

112. Chlorination of water may be harmful if the water contains_________________?
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A. All

B. Carbon dioxide

C. Ammonia

D. Dissolved oxygen

113. Benzene is a good solvent for__________________?
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A. fats

B. iodine

C. all the above

D. resins

114. Which of the following set has all species isoelectronic__________________?
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A. H+ H- H

B. F Ne Na+

C. Li+1 Na+1 K+1

D. F Cl Br

115. Which one is not the use of silicones________________________?
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A. Medicine

B. Rubber sheet

C. Water repellent film

D. Lubricant

116. The number of isotopes of elements with even mass number and even atomic number are ________________?
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A. 300

B. 280

C. 54

D. 154
117. Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?
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A. covalent network solids

B. ionic substances

C. metallic substances

D. molecular solids

118. Molecular mass of water (18g) means__________________?
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A. 1-mole molecules of water

B. 1-gram molecule of water

C. all

D. 3-gram atoms

119. The unit of the rate constant (k) is same as that of rate of reaction________________?
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A. Zero order reaction

B. Third order reaction

C. Second order reaction

D. First order reaction

120. If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________?
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A. ?273.16?C

B. 0?C

C. 273.16K

D. ?273.16 K