chemistry MCQs – Page 55

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 Review each marked answer and report any item that may be outdated or unclear.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
1081. The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?
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A. 2.05 gram

B. 3.05 gram

C. 5.05 gram

D. 4.05 gram

1082. 50% inversion of configuration of molecules take place in a___________________?
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A. SN1 reaction

B. SN2 reaction

C. E2 reaction

D. E1 reaction

1083. The volume strength of 1.5 N H2O2 solution is_______?
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A. 5.2

B. 4.8

C. 8.4

D. 8.8

1084. Methyl alcohol is not used__________________?
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A. As a solvent

B. As an antifreezing agent

C. As a substitute for petrol

D. For denaturing of ethyl alcohol

1085. Ethanol can be converted into ethanoic acid by_________________?
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A. Hydrogenation

B. Hydration

C. Oxidation

D. Fermentation

1086. Basicity of orthophosphoric acid is________?
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A. 5

B. 3

C. 4

D. 2

1087. Which one of the following alcohol has greater boiling point___________________?
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A. methanol

B. ethylene glaycol

C. ethanol

D. glycerol
1088. The maximum oxidation shown by manages is_________?
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A. +7

B. 2

C. 5

D. 4

1089. The gas used in manufacturing of urea fertilizer__________________?
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A. C2H4

B. CH4

C. C2H2

D. C2H6

1090. A 10 volume solution of H2O2 means_______?
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A. 10 litres of H2O2 liberates 19 mL of O2 at STP

B. 10 gram equivalents of H2O2 liberates 10 mL of O2 at STP

C. 10 grams of H2O2 solution liberate 10 mL of O2 at STO

D. 1mL of solution of H2O2 liberates 10 mL of O2 at STP
1091. The hydrogenation of phenol in the presence of Ni and heat gives_________________?
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A. cyclohexanol

B. 1 hexanol

C. n hexane

D. cyclohexane

1092. Dehalogenation of ethyl tetrahalide will give____________________?
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A. all of the above are possible

B. ethyne

C. ethyl halide

D. ethene

1093. The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
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A. this acid was first obtained by the distillation of ants

B. this corrosive acid is secreted by ants to drive away their enemies

C. this acid, in ancient times, was used to eliminate ant-hills

D. ants are attracted by the odour of this acid

1094. Stainless steel contains___________?
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A. Fe+ Cr+Cu

B. Cu+C+Ni

C. Fe+Ni+Cu

D. Fe+Cr+Ni
1095. The molar mass of an organic acids is determined by____________?
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A. Osmosis method

B. Depression of freezing point

C. Victor Meyers method

D. Volumetric method
1096. The number of molecules taking part in the rate determining step is called___________________?
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A. Rate of reaction

B. Mole of a reaction

C. Order of reaction

D. Extent of a reaction

1097. The octane number of zero is assigned to____________?
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A. 2-methyl octane

B. n-heptane

C. iso-octane

D. 3-methyl octane

1098. Which of the following oxides of iodine is used for quantitative analysis of CO ?
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A. I2O4

B. I4O2

C. I2O5

D. All are equally useful

1099. A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
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A. C3H6

B. C4H8

C. C5H10

D. C2H4

1100. Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0C?
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A. 546 C

B. 273 K

C. 200C

D. 546 K