chemistry MCQs – Page 38

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 Review each marked answer and report any item that may be outdated or unclear.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
741. Which of the following is not an ester_________________?
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A. sodium butyrate

B. amyl acetate

C. isobutyle formate

D. octyl acetate

742. Benzene does not undergo___________________?
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A. Substitution reaction

B. Oxidation reactions

C. Polymerization reactions

D. Addition reaction

743. The oxides of beryllium BeO is_______________?
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A. Acidic

B. Neutral

C. Amphoteric

D. Basic

744. In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
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A. Cathode to decay

B. Hydroxide ions to reach anode

C. All of the above

D. Chlorine gas to mix

745. The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
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A. all above

B. fats and oils

C. proteins and oild

D. fats and proteins

746. Which of the following will have the highest boiling point ?
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A. ethanal

B. propanal

C. hexanone

D. methanol

747. Nitrates of which pair of elements give different products on thermal decomposition ?
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A. Na K

B. Li Ca

C. Li Na

D. Mg Ca

748. Which of the following is not a use of silicon ?
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A. Antifreeze

B. Water repellent

C. Lubricants

D. Hydraulic brakes

749. Which one can form complex ?
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A. Li

B. Cr

C. Na

D. K

750. Which of the following is metasilicic acid ?
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A. H3SbO4

B. H3AsO4

C. H2SiO3

D. H2SnO3

751. Gypsum is applied to the soil as a source of________________?
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A. we could not apply

B. Ca and P

C. Ca and S

D. S and P

752. The term internal salt refers to_____________________?
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A. Non-polar structure of amino acids

B. Acidic character of amino acids

C. Dipolar character of amino acids

D. Basic character of amino acids

753. Formalin is ___________ solution of formaldehyde in water?
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A. 40%

B. 20%

C. 10%

D. 60%

754. Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
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A. Tartaric acid

B. Valeric acid

C. Propanoic acid

D. Lactic acid
755. Among halogens the highest boiling point is of___________________?
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A. Flrorine

B. Chlorine

C. Iodine

D. Bromine

756. Hydrogen resembles with carbon because of having________________?
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A. Similar physical state

B. Same number of electrons in the valence shell

C. Homovalent (show same valency)

D. Remarkable reducing properties
757. Li is different from its family members due to____________________?
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A. all of the above

B. small size

C. high charge density

D. less electropositivity

758. Ketones are comparatively less reactive than aldehdye. It is due to_______________?
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A. alkyl groups are electron donating

B. steric hindrance

C. Both A and B

D. none

759. The element of group VIA which is a non-metal is________________?
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A. Te

B. Po

C. Se

D. S
760. In rate expression the concentration of reactants is negative. It shows_______________?
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A. Concentration of reactant decreases

B. Concentration of reactant does not change

C. Concentration of product increases

D. Concentration of reactant increases