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NEET Chemistry MCQ
Haloalkanes And Haloarenes Mcq Neet Chemistry
Quiz 5
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Q.1
The reactivity order of alkyl halides depends upon
0%
a) nature of alkyl group only
0%
b) nature of both alkyl group and halogen atom
0%
c) Halogen group only
0%
d) None of the above
Explanation
Answer:(b)
Q.2
Monohalogen derivative of alanes with alcoholic KOH gives
0%
a) alkane
0%
b) alkene
0%
c) alkyne
0%
d) alicyclic hydrocarbon
Explanation
Answer:(b)
Q.3
Which of the following reaction can give freon (CCl2F2)
0%
a) CCl4 + F2 →
0%
b) CH3Cl + F2 →
0%
c) C+F2+Cl2 →
0%
d)
Explanation
Answer:(d)
Q.4
When vinyl chloride is passed through alcoholic KOH solution
0%
a) it has no action
0%
b) it dissolves
0%
c) it forms acetylene
0%
d) it forms vinyl alcohol
Explanation
Answer:(c)
Q.5
which of the following does not react with benzene in presence of anhydrous AlCl3
0%
a) C6H5Cl
0%
b) C6H5CH2Cl
0%
c) CH3Cl
0%
d) C6H5CH2CH2CH2Cl
Explanation
Answer:(a)
Q.6
ssertion: RI is more reactive than RCl towards SN reaction Reason: The rate of reaction for SN1 or SN2 mechanism is RI > RCl
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 correct and Reason is correct explanation of Assertion
0%
d) Both Assertion and Reason are correct but Reason is not correct explanation of Assertion
Explanation
Answer:(c)
Q.7
Chloroform is kept in dark coloured bottles because
0%
a) It is inflammable
0%
b) It oxidized to poisonous gas phosgene
0%
c)
0%
d)
Explanation
Answer:(b)
Q.8
Idntify (Z) in the following reaction series
0%
a)
0%
b)
0%
c)
0%
d) CH3 - CH2 - CN
Explanation
Answer:(a)
Q.9
1, 3-dibromopropane reacts with metallic zinc to form
0%
a) cyclopropane
0%
b) hexane
0%
c) propene
0%
d) hexane
Explanation
Answer:(a)
Q.10
Grignard reagent undergoes
0%
a) nucleophilic substitution
0%
b) nucleophilic addition
0%
c) both (a) and (b)
0%
d) none of the above
Explanation
Answer:(c)
Q.11
Which of the following is least reactive in a nucleophilic substitution reaction?
0%
a) (CH3)3CCl
0%
b) CH2 = CHCl
0%
c) CH3CH2Cl
0%
d) CH2 = CHCH2Cl
Explanation
Answer:(b)
Q.12
Ethylene dichloride and ethylidene chloride are isometric compounds. Identify the statement which is not applicable to both of them?
0%
a) Give Fehling test
0%
b) Resct with aqueous potash and give the same products
0%
c) Are dihalides
0%
d) react with alcoholic potash
Explanation
Answer:(b)
Q.13
A mixture of sodium acetate and sodalime is heated and the product trated with excess of chlorine in presence of bright sunlite. the product is
0%
a) CH3COOH
0%
b) CH2BrCOOH
0%
c) CCl4
0%
d) CH3Cl
Explanation
Answer:(c)
Q.14
A salt solution is treated with chloroform drops and is shaken with chlorine water. Chloroform layer becomes violet, solution contains
0%
a) NO2-
0%
b) NO3-
0%
c) Br-
0%
d) I-
Explanation
Answer:(d)
Q.15
hypnotic drug Chloretone is prepared by reaction of acetone with
0%
a) ethyl chloride
0%
b) Chloroform
0%
c) methyl chloride
0%
d) Carbon tetra chloride
Explanation
Answer:(b)
Q.16
Anhydrous HCl gas, on passing through ethyl alcohol, in presence of anhy.ZnCl2 gives
0%
a) ethane
0%
b) ethyl chloride
0%
c) etahne
0%
d) CCl4
Explanation
Answer:(b)
Q.17
The reactivities of methyl chloride (A), propyl chloride (B) and chlorobenzene (C) are in the order
0%
a) A > B > C
0%
b) C > B > A
0%
c) A > C > B
0%
d) B > A > C
Explanation
Answer:(a)
Q.18
Polymer of chloroethylene is
0%
a) PVC
0%
b) teflon
0%
c) terylene
0%
d) nulon
Explanation
Answer:(a)
Q.19
Carbon tetrachloride reacts with steam at 500°C to give
0%
a) COCl2
0%
b) CHCl3
0%
c) both (a) and (b)
0%
d) none of these
Explanation
Answer:(a)
Q.20
In the reaction CH3C ≡ CNa+ + (CH3)2CHCl → the product formed is
0%
a) propyne
0%
b) propyne and propene
0%
c) 4-methyl-2-pentyne
0%
d) none of the above
Explanation
Answer:(c)
Q.21
Benzyl chloride is formed by treating toluene with Cl2 in
0%
a) presence of light
0%
b) absence of light
0%
c) treating benzene with anhy. AlCl3
0%
d) treating benzene with As2S3
Explanation
Answer:(a)
Q.22
Which of the following can be used as local anaesthetic?
0%
a) CHCl3
0%
b) C2H4 with O2
0%
c) C2H5Cl
0%
d) C2H5OH
Explanation
Answer:(c)
Q.23
The industrial preparation of chloroform employs acetone and
0%
a) phosgen
0%
b) calcium hypochloride
0%
c) chlorine gas
0%
d) sodium chloride
Explanation
Answer:(b)
Q.24
An alyl iodide on standing darkens, due to
0%
a) formation of alkenes
0%
b) formatation of alkeyenes
0%
c) libration of iodine
0%
d) oxidation
Explanation
Answer:(c)
Q.25
In the following reaction X and Y respectively are
0%
a) benzene, benzoic acid
0%
b) toluene, benzaldehyde
0%
c) toluene, benzoic acid
0%
d) benzene, benzaldehyde
Explanation
Answer:(c)
Q.26
C2H5Br can be obtained in the laboratory by the action of ethyl alcohol with
0%
a) Br2
0%
b) KBr
0%
c) KBr and conc. H2SO4
0%
d) NH4Br
Explanation
Answer:(c)
Q.27
Ethylidene dichloride on treatmnet with aqueous KOH gives
0%
a) CH3CHO
0%
b) HCO
0%
c)
0%
d)
Explanation
Answer:(a)
Q.28
Which one is liquid at room temperature
0%
a) C2H5Br
0%
b) C2H5Cl
0%
c) CH3Cl
0%
d) CH3Br
Explanation
Answer:(a)
Q.29
Chloral is
0%
a) CCl3.CO.CCl3
0%
b) CCl3.CH2OH
0%
c) CCl3.CO.CH3
0%
d) CCl3CHO
Explanation
Answer:(d)
Q.30
Which is most reactive for SN2 reactions?
0%
a) CH3I
0%
b) C2H5I
0%
c) C3H7I
0%
d) C4H9I
Explanation
Answer:(a)
0 h : 0 m : 1 s
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