CHEMISTRY MCQSS

CHEMISTRY CHAPTER 8 (II)

1..florination of alkanes produces

a)florinated alkanes

b)hyrdofloruic acid

c)both a and b 

d)depends upon amount of alkane

Right answer (C)

2..CH4 cannot be prepared by ?

a)by grignard reagent

b)kolbs electrolysis

c)hydrogenolysis

d)by all methods can be prepared

Right answer (B)

3..which of the following ions is most stable 

A. CH3+

B. CH3--CH2+

C. (CH3)2CH+

D. (CH3)3C+

Right answer (D)

4..Which of the following is an Unsaturated fatty acid ?

A) Vegetable ghee

B) Vegetable Oil

C) Both are saturated

D) None

Right answer (B)

5..Liege rules were presented by ___ ?

A) IUC

B) IUPAC

C) CHOH

D) none

Right answer (A)

6..Liege rules were modified by ____ ?

A) IUC

B) IUPAC

C) CHOH

D) None

Right answer (B)

7..order of reactivity of Halogen acids ______ ?

A) HF>HCL>HBr>HI

B) HI >HBr>HCl>HF

C) HF>HBr>HCl>HI

D) HBr>HCl>HF>HI

Right answer (B)

8...How many Pi-bonds are present in Alkenes____ ?

A) 1

B) 2

C) 3

D) 0

Right answer (A)

9...‎____ decrease with increase in carbon number

a)boiling point

b)melting point

c)vapour presure

d)none

Right answer (C)

10.which is used as a synthetic rubber??

a. chloroprene

b. isoprene

c. neoprene

d. all 

Right answer (C)

 11..ozonolysis of propene gives 

A. Methanal 

B. Ethanal 

C. Propanal 

D. Both a and b

Right answer (D)

12.. which one of these is chloroform

a.CH3CL

B.CHCl2

C.CH2Cl

D.CHCL3

Right answer (D)

13..THE ease of dehydration of various alcohols is in order of

a.prim.alcohol<sec.<tert

b.tert>sec>prim

c.both

d.none

Right answer (C)

14..which test is used to detect the location of DOUBLE BOND ?

A) Hydrogenation

B) Hydroxylation

C) Halogenation

D) Ozonolysis

Right answer (D)

15..Which test is used for detection of presence of unsaturation in alkenes?

A) Hydrogenation

B) Hydroxylation

C) Halogenation

D) Ozonolysis

Right answer (B)

16.. marsh gas is ?

a)phosphene

b)phosgene

c)dicloro ethyle sulphide

d)methane

Right answer (D)

17..boiling point increases by 20-30 degree c when molecular mass increases by ?

a)15 units

b)12 units

C)14 units

d)no relation

Right answer (C)

18..keton is reduced to the alkane by ____reaction

a.wolfkishner's reduction

b.clemmensen reaction 

c.both

d.none

Right answer (B)

19... what is the order of reactivity?

a)alkenes>alkanes>alkynes

b)alkanes>alkenes>alkynes

c)alkenes>alkynes>alkanes

d)alkynes>alkenes>alkanes

Right answer (C)

‎20._____ are most reactive towards Nucleophilic reagents ?

A) alkenes

B) alkanes

C) alkynes

D) None

Right answer (C) 

21..hydrogenation can be carried out with Pt or Pd at __temperature

a)200 degree C

b)300 degree C

c)25 degree C

d)250 degree C

Right answer (C)

22..For Preparation of Alkenes by Dehdration of Seconday alchols temp. %of H2SO4 required is ____ ?

A) 75% 140-170 

B) 65% 100-140

C) 60% 100

D) 55% 90

Right answer (C)

23..in case double and triple bond are placed at identical positions which bond is given lower number?

a)double

b_triple

c)any of these

d)single
Right answer (A)

24..for alkanes with ___ or more carbon atoms root word is derived from GREEk or LATIN numeral?

a)4

b)2

c)1

d)5
Right answer (D)

25..boiling point of isobutane?

a)11.7

b)-11.7

c)-0.5

d)0.5
Right answer (B)

26..by addition of one CH2 the boiling point increases by

a.10 degree

b.20 -30 degree

c.both

d.none
Right answer (B)

27..in nomenclature of organic compounds numbers are separated from words by?

a)comma

b)dot

c)hyphen

d)any
Right answer (C)

28..what is soda lime?

a)CaO

b)NaOH

c)CaO+NaOH

d)none
Right answer (C)

29. boiling point of n-butane is.

a. -11.7degree celsius

b. -0.5degree celsius

c. +11.7degee celsius

d. +0.5degree celsius

Right answer (B)

30. Clemenson reduction involves reduction of_________

a. adehydes

b. ketones

c. carboxylic acids

d. grignard reagents

Right answer (B)

31. Zn amalgum alongwith HCL is used as catalyst in______

a. Clemenson reduction

b. Wolfkishner reduction

c. Kolbe's electrolysis

d. Hyrogenolysis

Right answer (A)

32. N2H4 is the formula for:-

a. hydrazone

b. hydrazine

c. amin hydrazine

d. phenyl hadrazone

Right answer (B)

33.what products are formed by incomplete oxidation of alkanes??

a. CO2 + H2O

b. CO + H2O +C

c. CO2 + H2O + C

d. C + H2O

Right answer (B)

34. nitration of alkanes is a/an:-

a. elimination reaction

b.addition reaction

c. sustitution reaction

d.reduction reaction

Right answer (C)

35. extent of halogenation depends upon:

a. amount of halogen present initialy

b. amount of halogen used

c. amount of halogen left un used

d. temperature availabilty

Right answer (B)

36. methane is used in industrial preparation of :-

a. methyl chloride

b. chloroform

c. methyl alcohol

d. all

Right answer (C)

37. alcoholic KOH is used in :

a. dehalogenation process

b. dehydration process

c. dehydrohalogenation process

d. dehydrogenation process

Right answer (C)

38.which of these alcohols dehydrates to alkenes at 100degree in presence of 60% H2SO4 :

a. primary

b. secondary

c. tertiary

d. none

Right answer (B)

39. partial hydrogenation of alkynes in the presence of Pa ( BaSO4) , quonoline as catalyst gives:

a. cis alkane

b. trans alkane

c. cis alkene

d. trans alkene

Right answer (C)

40. the catalytic hydrogenation of alkenes is generally _____

a. qualitative

b. quantitative

c. both

d. irrelevant data

Right answer (B)

41. which of the follwing satisfies Marcowinicov's rule??

a. symmetrical alkanes

b. symmetrical alkenes

c. unsymmetrical alkynes

d. unsymmetrical alkenes

Right answer (D)

42. during Marcowinicov's rule, the negative part of adding reagent goes to which carbon??

a. which has greater no. of hydrogen atoms

b. which has least no. of hydrogen atoms

c. which has greater no. of electrons

d. which has least no. of electrons

Right answer (B)

43. the effective electrophilic reagent is/are:

a. F2

b. Cl2

c. Br2

d. I2

e. both b and c

f. all
Right answer (E)

44. the order of reactivity of halogens is:

a. F2> Cl2> Br2 > I2

b. I2 > Br2> Cl2> F2

c. Br2> Cl2> I2> F2

d. Cl2> Br2 > I2> F2

Right answer (A)

45. which of the following attacks on th carbon of bromonium ion during addition of halogens to alkenes??

a. electrophilic Bromide ion

b. nucleophilic bromide ion

c. neutral bromine

d. none

Right answer (B)

46. halohydrin is formed in :-

a. acidic solution

b. basic solution

c. aqueous solution

d. not formed in any solution

Right answer (C)

47. the catalyst during formation of epoxides is ??

a. CCl4

b. Ag2O

c. Al2O3

d. KMnO4
Right answer (B)

48. OH-CH2-CH2-OH is the formula of :

a. epoxide

b. viccinal glycol

c. vinyl enol

d. glycerol
Right answer (B)

49. the correct pairing for molozonide nd ozonide respictively is:

a. unstable, unstable

b. stable, unstable

c. unstable, stable

d. stable, stable
Right answer (A)

50. B,B- dichloroethyl sulphide is :- (B= beta)

a. high boiling gas

b. low boiling liquid

c. high boiling liquid

d. high melting solid
Right answer (C)