NEET Chemistry MCQ - Haloalkanes And Haloarenes Mcq Neet Chemistry - Quiz-6 - MCQGeeks.com

Q.1

The product obtained on treatmnet of ethyl chloride with potassium cyanide is reduced by heating with 20% H2SO5 at 363K, if the yield is 65%

0%
a) 16g
0%
b) 18.2g
0%
c) 20g
0%
d) 22g

Q.2

Following reaction is example of C2H5Br + KCN(aq) → C2H5CN + KBr

0%
a) redox change
0%
b) elimation
0%
c) electrophilic substitution
0%
d) nucleophilic substitution

Q.3

Which of the following do not form Grignard reagent 1

0%
a) CH3I
0%
b) CH3F
0%
c) CH3Cl
0%
d) CH3Br

Q.4

Optically active compound is

0%
a) 2-chlorobutane
0%
b) 2-chloropropane
0%
c) 3-chloropentane
0%
d) 3-chlorobutane

Q.5

The hydrogen atom in chloroform is

0%
a) acidic
0%
b) basic
0%
c) neutral
0%
d) none of these

Q.6

The comound A forms B with sodium metal and again A froms C with PCl5, but B and C form diethyl ether. Therefore A, B, and C are

0%
a) C2H5OH, C2H5ONa, C2H5Cl
0%
b) C2H5OH, C2H5Cl, C2H5ONa
0%
c) C2H5OH, C2H5Cl, C2H4Cl2
0%
d) C2H5ONa, C2H5OH, C2H5Cl

Q.7

Assertion: CHI3 gives a precipitate with AgNO3 solution on heating but CHCl3 Reason: C - I bond is quite weak as compared to C-Cl bond

0%
a) Assertion is correct but Reason is wrong
0%
b) Assertion is wrong but Reason is correct
0%
c) Both Assertion and Reason are correcr and Reason is correct explanation of Assertion
0%
d) Both Assertion and Reason are correcr and Reason is not correct explanation of Assertion

Q.8

Which process does not occur during formation of CHCl3 from C2H5OH and bleaching powder?

0%
a) hydrolysis
0%
b) oxidation
0%
c) elimination
0%
d) chlorination

Q.9

Which compound is used in cooling?

0%
a) CHCl3
0%
b) CCl4
0%
c) CF4
0%
d) CCl2F2

Q.10

In the following reacton end product C is

0%
a) Propene
0%
b) Propyne
0%
c) Propan-1-ol
0%
d) Propan-2-ol

Q.11

Dehydrohalogenation in haloalkanes produces

0%
a) single bond
0%
b) double bond
0%
c) triple bond
0%
d) fragmentation

Q.12

Grignard reagent is prepared by the reaction between

0%
a) zinc and alkyl halide
0%
b) magnesium anad alkane
0%
c) magnesium and alkyl halide
0%
d) magnesium and aromatic hydrocarbon

Q.13

Assertion: Aryl halides undergo uncleophilic substitution with ease Reason: The carbon halogen bond in aryl halides has partial double bond character

0%
a) Assertion is correct but Reason is wrong
0%
b) Assertion is wrong but Reason is correct
0%
c) Both Assertion and Reason are correcr and Reason is correct explanation of Assertion
0%
d) Both Assertion and Reason are correcr and Reason is not correct explanation of Assertion

Q.14

Trichloro acetone reacts with lime water to form

0%
a) CH3OH
0%
b) CH3CHO
0%
c) CHCl3
0%
d) CH3Cl

Q.15

The reaction products of the reaction between CH5NH2, CHCl3 and KOH

0%
a) C6H5CN + KCl
0%
b) C6H5NC + KCl
0%
c) C6H5Cl + NH4Cl + KCl
0%
d) C6H5OH + NH4Cl + H2O

Q.16

n- propyl bromide reacts with ethanolic KOH

0%
a) propene
0%
b) propane
0%
c) propyne
0%
d) propyl alcohol

Q.17

The antiseptic character of iodoform is due to

0%
a) unpleasent smell
0%
b) its poisonous nature
0%
c) liberation of free iodine
0%
d) none of the above

Q.18

A compound A of formula C3H6Cl2 on reaction with alkali can give B of formula C3H6O or C of formula C3HB on oxidation gave a compound of the formula C3H6OC with dilute H2SO4 containing Hg2+ ion gave D of formula C3H6O, which with bromine and NaOH give the sodium salt of C2H4O2 then A is ..

0%
a) CH3CHClCH2Cl
0%
b) CH3CCl2CH3
0%
c) CH3CH2CHCl2
0%
d) CH3CHClCH2Cl

Q.19

Vicinal and geminal dihalides can be distinguished by

0%
a) KOH (aq)
0%
b) KOH (alc.)
0%
c) Zn dust
0%
d) none of these

Q.20

Chloroform on reduction with Zn and HCl(alc.) gives

0%
a) methylene dichloride
0%
b) formic acid
0%
c) chloropicrin
0%
d) chloroform

Q.21

Methyl chloride on treatment with potassium cyanide followed by hydrolysis yields

0%
a) HCOOH
0%
b) CH3COOH
0%
c) CH3CN
0%
d) CH3COOK

Q.22

In the following reaction

0%
a) C6H5CH2OCH2C6H5
0%
b) C6H5CH2OH
0%
c) C6H5CH3
0%
d) C6H5CH2CH2C6H5

Q.23

Benzene reacts with n -propyl chloride in the presence of anhydrous AlCl3 to give predominantly

0%
a) isopropyl benzene
0%
b) no reaction
0%
c) n- propylbenzene
0%
d) 3-propyl-1-chlorobenzene

Q.24

The SN1 reactivity of ethyl chloride is

0%
a) more or less equal to that of chlorobenzene
0%
b) less than that of chlorobenzene
0%
c) more or less equal to that of benzyl chloride
0%
d) less than that of benzyl chloride

Q.25

2-bromo pentane is heated with poatassium ethoxide in ethanol. The major product

0%
a) trans- pent-2-ene
0%
b) 2-ethoxy pentane
0%
c) pent-1-ene
0%
d) cis -pent-2-ene

Q.26

In the following sequence of raction end product (C) is

0%
a) Acetaldehyde
0%
b) Ethyl alcohol
0%
c) Acetone
0%
d) Methane

Q.27

Which is used as a general anaesthetic in place of diethyl ether?

0%
a) CF3 - CHClBr
0%
b) CF3- CHCl2
0%
c) CF3 - CHBr2
0%
d) None of these

Q.28

hich would be obtained by boiling CHCl3 with caustic soda?

0%
a) CH3COONa
0%
b) Na2C2O4
0%
c) CH3OH
0%
d) HCOONa

Q.29

The number of stereoisomers of compound CH3 - CH = CH - CHBr - CH3 would be

0%
a) 2
0%
b) 3
0%
c) 4
0%
d) 5

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