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Question Bank No: 1

1. Benzene reacts with ${Cl}_{2}$ in the presence of halogen carriers to produce

a)		Benzyl chloride
b)		Benzal chloride
c)		Chlorobenzene
d)

2. Which of the following compound will form hydrocarbon on reaction with Grignard's reagent?

a)		${CH}_{3} {CH}_{2} OH$
b)		${CH}_{3} CHO$
c)		${CH}_{3} {COCH}_{3}$
d)		${CH}_{3} {COOCH}_{3}$

3. Toluene on oxidation with dilute ${HNO}_{3}$ gives

a)		Benzaldehyde
b)		Phenol
c)		Nitrotoluene
d)		Benzoic acid

4. Benzene reacts with ${CH}_{3} COCl$ in the presence of ${AlCl}_{3}$ to give

a)		$C_{6} H_{5} Cl$
b)		$C_{6} H_{5} COCl$
c)		$C_{6} H_{5} {CH}_{3}$
d)		$C_{6} H_{5} {COCH}_{3}$

5. Acetylene reacts with ammoniacal silver nitrate to form

a)		silver mirror
b)		metal silver
c)		silver acetate
d)		silver acetylide

6. Reactions of alkanes with halogens is explosive in case of

a)		$F_{2}$
b)		${Cl}_{2}$
c)		${Br}_{2}$
d)		$I_{2}$

7. Which of the following shows acidic character

a)		${CH}_{3} C \equiv CH$
b)		${CH}_{3} C \equiv {CCH}_{3}$
c)		${CH}_{3} - {CH}_{3}$
d)		${CH}_{2} = {CH}_{2}$

8. Which gaseous hydrocarbon is produced when calcium carbide reacts with water?

a)		Methane
b)		Ethane
c)		Ethylene
d)		Acetylene

9. In the commercial gasolines, the type of hydrocarbons which are not desirable is

a)		Branched hydrocarbon
b)		Straight chain hydrocarbon
c)		Linear unsaturated hydrocarbon
d)		Toluene

10. Which of the following substances is used as an antiknock compound?

a)		Tetraethyl lead
b)		Lead Tetrachloride
c)		Lead Acetate
d)		Ethyl Acetate

11. Which of the following has highest chlorine content?

a)		Pyrene
b)		DDT
c)		Chloride
d)		Gammaxane

12. Propene is reacted with HBr in presence of peroxide, the product is

a)		2-bromopropane
b)		1-bromopropane
c)		3-bromopropane
d)		none of these

13. An alkane $C_{7} H_{16}$ is produced by the reaction of Lithium di (3-Pentyl) cuperate with ethyl bromide. The structural formula of product is

a)		3-methylhexane
b)		2-ethylpentane
c)		3-ethylpentane
d)		n-heptane

14. n-Butylbenzene on oxidation will give

a)		Benzoic acid
b)		Butanoic acid
c)		Benzyl alcohol
d)		Benzaldehyde

15. Which process is suitable for the purification of Aniline?

a)		simple distillation
b)		steam distillation
c)		fractional distillation
d)		fractional crystallisation

16. In Duma's method, the gas which is collected in nitrometer is

a)		$N_{2}$
b)		NO
c)		${NH}_{3}$
d)		$H_{2}$

17. The simplest formula of compound containing 50% of element X(at.wt.10) and 50% of element Y (at.wt.20) is

a)		XY
b)		${XY}_{2}$
c)		$X_{2} Y$
d)		$X_{2} Y_{3}$

18. Distillation is used to seperate liquids which differ in their boiling point by

a)		$5^{0} C$
b)		$10^{0} C$
c)		$30^{0} - 80^{0} C$
d)		$100^{0} C$

19. Nitrogen in an organic compound can be estimated by

a)		Kjeldahl's method only
b)		Duma's method only
c)		Both the methods
d)		None of these methods

20. The purity of an organic compound is determined by

a)		density
b)		melting point
c)		mixed melting point
d)		molecular weight

21. Chloroform and Benzene form a pair of miscible liquids. These can be separated by

a)		sublimation
b)		filtration
c)		a separating funnel
d)		distillation

22. A compound with empirical formula ${CH}_{2} O$ has a vapour density of 30. Its molecular formula is

a)		$C_{2} H_{2} O_{2}$
b)		$C_{2} H_{4} O_{2}$
c)		$C_{3} H_{6} O_{3}$
d)		$C_{6} H_{12} O_{6}$

23. An organic compound with C=40%, H=13.33% and N=46.67%. Its empirical formula would be

a)		$CHN$
b)		$C_{2} H_{2} N$
c)		${CH}_{4} N$
d)		$C_{3} H_{7} N$

24. Which of the following is the scientific method to test presence of water in a liquid?

a)		smell
b)		taste
c)		use of litmus paper
d)		use of anhydrous copper sulphate

25. Carbon atom holding halogen in Aryl halides is

a)		${sp}^{2}$ hybridised
b)		${sp}^{3}$ hybridised
c)		$sp$ hybridised
d)		${sp}^{3} d$ hybridised

26. DDT is formed from

a)		Benzene and Chlorobenzene
b)		Chloral and Chlorobenzene
c)		Chloral and Benzene
d)		Chlorobenzene and Chlorine

27. Reaction of ethylamine with chloroform in alcoholic KOH produces

a)		${CH}_{3} OH$
b)		${CH}_{3} NC$
c)		$C_{2} H_{5} NC$
d)		$C_{2} H_{5} CN$

28. Ethyl bromide reacts with lead-sodium alloy to form

a)		Tetraethyl lead
b)		Tetraethyl lead bromide
c)		both
d)		none

29. Phosgene is a common name of

a)		mixture of ${CO}_{2}$ and ${Cl}_{2}$
b)		${POCl}_{3}$
c)		Carbonyl Chloride
d)		${CCl}_{4}$

30. ${Cl}_{2}$ reacts with ${CS}_{2}$ in presence of ${AlCl}_{3}$ to form

a)		${CHCl}_{3}$
b)		${CCl}_{4}$
c)		$C_{2} H_{5} Cl$
d)		$C_{2} H_{6}$

31. Which of the following does not give iodoform test

a)		Ethanol
b)		Ethanal
c)		Acetophenone
d)		Benzophenone

32. 1,3-Dibromopropane reacts with metallic zinc to form

a)		Propene
b)		Propane
c)		Cyclopropane
d)		Hexane

33. Ethyl bromide on treatment with alcoholic KOH gives

a)		Ethylene
b)		Ethanol
c)		Acetic acid
d)		Ethyl

34. ${AgNO}_{3}$ does not give precipitate with chloroform because

a)		${CHCl}_{3}$ is insoluble in water
b)		${CHCl}_{3}$ does not ionise in water
c)		${CHCl}_{3}$ is an organic compound
d)		${AgNO}_{3}$ is insoluble in ${CHCl}_{3}$

35. Which of the following alkyl halides is used as a methylating agent?

a)		$C_{2} H_{5} Cl$
b)		$C_{2} H_{5} Br$
c)		$C_{2} H_{5} I$
d)		${CH}_{3} I$

36. On warming with silver powder, chloroform is converted into

a)		Acetylene
b)		Hexachloroethane
c)		1,1,2,2-Tetrachlorethane
d)		Ethylene

37. Action of nitrous acid on ethylamine gives

a)		$C_{2} H_{6}$
b)		$C_{2} H_{5} OH$
c)		$C_{2} H_{5} OH$ and $C_{2} H_{4}$
d)		$C_{2} H_{5} OH$ and ${NH}_{3}$

38. Which of the following cannot be produced by dehydration of alcohols?

a)		Ethers
b)		Aldehyde
c)		Alkyl hydrogen sulphate
d)		Alkene

39. Dehydration of glycerol gives

a)		Propane
b)		Propene
c)		Acrolein
d)		Benzene

40. Salicyaldehyde can be prepared from

a)		Phenol and Chloroform
b)		Phenol, Chloroform and Sodium Hydroxide
c)		Phenol, Carbon tetrachloride and $NaOH$
d)		None

41. When vapours of an alcohol passed over hot reduced copper, alcohol is converted into alkene, the alcohol is

a)		primary
b)		secondary
c)		tertiary
d)		none of these

42. Amongst the following phenols which is most acidic?

a)		Picric acid
b)		2-Nitrophenol
c)		2,4-Dinitrophenol
d)		m-Nitrophenol