chemistry MCQs – Page 49

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 Review each marked answer and report any item that may be outdated or unclear.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
961. Order of ease of halogenation in alkane is________________?
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A. F2>Cl2>Br2>I2

B. Cl2>F2>Br2>I2

C. I2>Cl2>Br2>F2

D. F2>Cl2>I2>Br2

962. Which one of the following halogens is present in Teflon________________?
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A. F2

B. I2

C. Br2

D. Cl2

963. Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
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A. Cl2O6

B. ClO2

C. Cl2O7

D. Cl2O

964. The halogen having highest electron affinity is_____________________?
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A. Bromine

B. Fluorine

C. Iodine

D. Chlorine
965. The halogen which reacts very slowly with halogen is________________?
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A. Bromine

B. Chlorine

C. Fluorine

D. Iodine
966. Find the PH of a 0.001 M solution of Nitric acid HNO3?
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A. 2

B. 5

C. 4

D. 3
967. Vander Waals forces are stronger in_______________?
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A. F2

B. Cl2

C. I2

D. Br2

968. In which compound nitrogen has maximum oxidation state____________________?
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A. N2O

B. HNO3

C. NO2

D. HNO2

969. The by-product of the process of Saponification is___________?
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A. Sodium hydroxide

B. Methanol

C. Glycol

D. Glycerol
970. The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
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A. CO2

B. C2H4

C. Xe

D. CH4

971. Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
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A. Zeolites

B. Nitrates

C. Sulphonides

D. Lime

972. Potassium Permanganate is used for purifying drinking water, because_________?
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A. It is an oxidising agent.

B. It dissolves the impurities of water.

C. It is a sterilising agent.

D. It is a reducing agent.

973. Absolute alcohol is obtained when rectified spirit is treated with__________________?
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A. CaO

B. CaCl2

C. CaCO3

D. Ca(OH)2

974. Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
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A. primary alcohol

B. secondary alcohol

C. tertiary alcohol

D. dihydric alcohol

975. When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
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A. 0.215

B. 0.9

C. 0.115

D. 0.015

976. The carbon-carbon bond strength is maximum in__________?
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A. Cyclohexane

B. CH2=CH2

C. Benzene

D. CH3CH3
977. Removal of CO2 is called_____________________?
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A. hydroxylation

B. esterification

C. carboxylation

D. decarboxylation
978. The given dissociation constant (Ka) value 1.310-10 is of_________________?
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A. Phenol

B. Alcohol

C. Water

D. Acetic acid

979. Azimuthal quantum number defines___________?
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A. e/m ratio of an electron

B. Magnetic momentum of an electron

C. Spin of an electron

D. Angular momentum of an electron
980. Presence of nitrogen in organic compounds is tested as__________?
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A. CN?

B. Nitrogen gas

C. NH3

D. NO