chemistry MCQs – Page 44

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 Review each marked answer and report any item that may be outdated or unclear.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
861. For determining the order of reaction we use__________________?
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A. Refractometric method

B. Dilatometric method

C. Optical activity method

D. Half life method
862. Allotropic form of phosphorus that is poisonous is___________________?
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A. White

B. Black

C. Red

D. Violet

863. The element cesium bears resemblance with________________?
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A. Ca

B. Cr

C. Both of the above

D. None of the above
864. The longest period in the modern periodic table is___________________?
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A. 6th

B. 7th

C. 5th

D. 2nd and 3rd both

865. The complete reduction carboxylic acid results in the formation of________________?
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A. Alcohol

B. Alkyne

C. Alkane

D. Alkene

866. Compounds of nitrogen and phosphorus are mostly________________?
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A. ionic

B. polar

C. all varieties are possible

D. covalent
867. Deuterium reacts with oxygen to form________________?
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A. Water gas

B. Hard water

C. Heavy water

D. Soft water

868. A catalyst can not effect__________________?
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A. Products

B. Chemical equilibrium

C. Reactants

D. both A & B
869. The gas which cannot be dried by conc. H2SO4 ?
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A. SO2

B. H2S

C. CO2

D. C2H4

870. Which one of the following is not an alkali metal ?
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A. Caesium

B. Rubidium

C. Radium

D. Francium

871. Higher value of electron affinity means__________________?
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A. Atom may form di-positive ion

B. Atom will lose electron easily

C. The reason is unknown

D. Atom will gain electron easily
872. Which one is least ionic in nature and decompose on heating ?
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A. NaOH

B. KOH

C. CsOH

D. LiOH
873. Metallic characters of alkali metals_____________________?
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A. No regular trend

B. Decrease down the group

C. Remain same

D. Increase down the group
874. Ncleophilic addition reactions are catalysed__________________?
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A. Acid

B. Base

C. Both A and B

D. None

875. Which of the following reaction is not shown by ketones ?
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A. reaction with 2 4 dinitrophenyl hydrazine

B. reaction with NaHSO3

C. reaction with Fehling solution

D. reaction with HCN

876. Nitronium ion is___________________?
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A. NO2-

B. NO

C. NO3

D. NO2+
877. Formula of haloform is_________________?
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A. CX4

B. CHX3

C. CH3X

D. HCOX

878. Substance which is found in dried up lakes of Tibet and California is_______________?
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A. Colemanite

B. Calcium carbonate

C. Boric acid

D. Tincal
879. Which of the following reaction is not shown by ketones ?
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A. reaction with Fehling solution

B. reaction with HCN

C. reaction with NaHSO3

D. reaction with 2 4 dinitrophenyl hydrazine

880. How many electrons are there in benzene to form delocalized electron cloud________________?
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A. 6

B. 3

C. 4

D. 8