chemistry MCQs – Page 58

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 Review each marked answer and report any item that may be outdated or unclear.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
1141. A theoretical link between quantum mechanics and thermodynamics is_________?
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A. Electrchemistry

B. Matrix mechanics

C. Soectroscopic analysis

D. Statistical thermodynamics
1142. Which one of the following compound does not have OH group___________________?
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A. ethyl acetate

B. picric acid

C. ethylene glycol

D. glycerol

1143. What is the molecular Weight of Nitric acid (HNO3 ) ?
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A. 65.012 g/mol

B. 70.012 g/mol

C. 81.011 g/mol

D. 63.012 g/mol
1144. Which of the following gases shows more ideal behaviour at 0C___________?
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A. NH3

B. H2

C. He

D. CH4

1145. Removal of halogen and hydrogen atom is_________________?
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A. dehalogenation

B. dehydrohalogenation

C. hydrohalogenation

D. halogenation

1146. The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
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A. Extraction

B. Gas chromatography

C. Column chromatography

D. Distillation

1147. Photographic plates are coated with a thin film of _________________?
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A. AgNO3

B. AgCl

C. AgI

D. AgBr
1148. Oxidation state +1 for phosphorous is found in___________?
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A. H2P2O7

B. H3PO2

C. H3PO4

D. H3PO3

1149. Preparation of vegetable ghee involves_________________?
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A. hydroxylation

B. hydration

C. halogenation

D. hydrogenation
1150. The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
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A. Diastase-zymase-maltase

B. Maltase-diastase-zymase

C. Diastase-maltase-zymase

D. Zymase-maltase-diastase

1151. Bleaching powder is an example of________________?
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A. Double salt

B. Complex

C. Mixed salt

D. Normal salt

1152. Which of the following orbitals has maximum penetration effect?
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A. S

B. d

C. f

D. P

1153. If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?
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A. Quenching

B. Tempering

C. Annealing

D. Nitriding

1154. The rectified spirit contains________________?
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A. 90% alcohol

B. 12% alcohol

C. 100% alcohol

D. 95% alcohol
1155. Tetraethyl lead is used as______?
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A. Petrol Additive

B. Pain Killer

C. Fire Extinguisher

D. Mosquito Repellent

1156. Generally the limit of visible spectrum is__________?
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A. 1000 to 300 A

B. 3800 to 7600 A

C. 12,000 to 15,000 A

D. 8000 to 10,000 A

1157. Which of the following statements is false about transition metals?
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A. They form coloured ions

B. They show variable valency

C. All transition metal compounds are paramagnetic

D. They form complexes

1158. The concept of telluric helix was developed by___________?
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A. Dobereiner

B. Lother Meyer

C. Newland

D. A.E de Chancourtois
1159. Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
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A. formaldehyde

B. carbondioxide

C. propanone

D. acetaldehyde

1160. The PH of Tears is __________?
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A. 7.4

B. 7

C. 8.2

D. 7.8