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NEET Chemistry MCQ
Haloalkanes And Haloarenes Mcq Neet Chemistry
Quiz 3
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Q.1
The substance employed as tear gas is
0%
a) westron
0%
b) chloretone
0%
c) Chloropicrin
0%
d) none of the above
Explanation
Answer:(c)
Q.2
grignard reagent shows addition on
0%
a) - C≡N
0%
b) >C=O
0%
c) >C=S
0%
d) all of these
Explanation
Answer:(d)
Q.3
Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because
0%
a) NO2 makes the electron rich ring at ortho and para position
0%
b) NO2 withdraw electrons at meta
0%
c) NO2 donate electrons at m-position
0%
d) NO2 withdraws electrons at ortho and para position
Explanation
Answer:(d)
Q.4
The correct order of melting and boiling points of the primary (1°), secondary (2°) and tertiary (3°) alkyl halides
0%
a) P > S > T
0%
b) T > S > P
0%
c) S > T > P
0%
d) T > P > S
Explanation
Answer:(a)
Q.5
The C-Mg bond in CH3CH2MgBr is
0%
a) polar covalent bond
0%
b) non-polar covalent bond
0%
c) ionic bond
0%
d) hydrogen bond
Explanation
Answer:(a)
Q.6
Which one is the most reactive towrds SN1 reaction?
0%
a) C6H5CH( C6H5)Br
0%
b) C6H5CH( CH3)Br
0%
c) C6H5C(CH3)( C6H5)Br
0%
d) C6H5CH2Br
Explanation
Answer:(c)
Q.7
CO2 on reaction with C2H5MgBr and H2O gives
0%
a) ethane
0%
b) propionic acid
0%
c) acetic acid
0%
d) none of these
Explanation
Answer:(b)
Q.8
Ethyl alcohol gives ethyl chloride on treatment with
0%
a) KCl
0%
b) SOCl2
0%
c) NaCl
0%
d) Cl2
Explanation
Answer:(b)
Q.9
Which of the following does not give yellow precipitate with AgNO 3 ?
0%
a) (CH3)3-CH2-I
0%
b) CH2=CH2-I
0%
c) CH2=C-CH3
0%
d) CHI3
Explanation
Answer:(c)
Q.10
Isocyanide test is used to detect
0%
a) primary amines
0%
b) primary alcohol
0%
c) secondary amines
0%
d) secondary alcohol
Explanation
Answer:(a)
Q.11
Phenol is heated with CHCl3 and alckoholic KOH when salicylaldehyde is produced. The reaction is kknown as ...
0%
a) Sommelete reaction
0%
b) Friedel-Craft reaction
0%
c) Rosenmund's reaction
0%
d) Reimer-Tiemann
Explanation
Answer:(d)
Q.12
The Mg - Br bound in CH3CH2MgBr is
0%
a) Covalent
0%
b) non-polar
0%
c) ionic
0%
d) none of these
Explanation
Answer:(c)
Q.13
Pick up the correct statement about alkyl halide.
0%
a) They show H-bonding
0%
b) They are soluble in water
0%
c) They do not contain any polar bond.
0%
d) They are soluble in organic solvents
Explanation
Answer:(d)
Q.14
Which of the following are arranged in decreasing order of dipole moment?
0%
a) CH3Cl, CH3Br, CH3F
0%
b) CH3Cl, CH3F, CH3Br
0%
c) CH3Br, CH3Cl, CH3F
0%
d) CH3Br, CH3F, CH3Cl
Explanation
Answer:(b)
Q.15
The following reaction is known as
0%
a) Wurtz reaction
0%
b) Fitting reaction
0%
c) Frankland's reaction
0%
d) Finkelstein's reaction
Explanation
Answer:(d)
Q.16
Methyl chloride reacts with silver acetate to yield
0%
a) Ethyl acetate
0%
b) acetic acid
0%
c) Methyl acetate
0%
d) Formic acid
Explanation
Answer:(c)
Q.17
Which of the following is the reason for insolubility of CCl4 in water
0%
a) CCl4 is non-polar
0%
b) Water is non-polar
0%
c) Water and CCl4 are polar
0%
d) None of the above
Explanation
Answer:(a)
Q.18
In the reaction below 'X' stands for
0%
a) an oxidant
0%
b) light and air
0%
c) a reductant
0%
d) none of these
Explanation
Answer:(b)
Q.19
Propyl iodide and isopropyl iodide are
0%
a) chain isomers
0%
b) metamers
0%
c) position isomers
0%
d) functional isomers
Explanation
Answer:(c)
Q.20
In order to get ethanethiol from C2H5Br
0%
a) Na2S
0%
b) NaHS
0%
c) KCNS
0%
d) K2S
Explanation
Answer:(b)
Q.21
A yellow precipitate is obtained when aqueous AgNO3 is added to a solution of the compound
0%
a) CCl3CHO
0%
b) CHCl3
0%
c) CH2 = C - CH2I
0%
d) C6H5CH2Cl
Explanation
Answer:(c)
Q.22
2-chlorobutane obtained by chlorination of butane, will be
0%
a) meso-form
0%
b) racemic form
0%
c) d-form
0%
d) l-form
Explanation
Answer:(b)
Q.23
Which of the following is primary halide?
0%
a) Isopropyl halide
0%
b) Sec.butyl halide
0%
c) Tert.butyl halide
0%
d) Neo-hexyl chloride
Explanation
Answer:(d)
Q.24
Which group is displaced by a halogen group
0%
a) Hydroxyl (OH) group
0%
b) Aldehyde (-CHO) group
0%
c) Nitro (-NO2) group
0%
d) Keto (C=O) group
Explanation
Answer:(a)
Q.25
When CCl4 is boiled with KOH, the product formed is
0%
a) formic acid
0%
b) carbon dioxide
0%
c) methl alcohol
0%
d) formaldehyde
Explanation
Answer:(b)
Q.26
Which is finally produced when acetylene reacts with HCF?
0%
a) CH3CHCl2
0%
b) CH2=CHCl
0%
c) ClCH=CHCl
0%
d) None of the above
Explanation
Answer:(a)
Q.27
The alkyl group of Grignard reagent acts as
0%
a) free radical
0%
b) carbanion
0%
c) carbonium ion
0%
d) none of the above
Explanation
Answer:(b)
Q.28
The phosphrous pentachloride reacts with ethanol to give
0%
a) ethyl chloride
0%
b) ethylidene chloride
0%
c) ethylene chloride
0%
d) all of these
Explanation
Answer:(a)
Q.29
Chlorine is most reactive towards NaOH in
0%
a) CH3Cl
0%
b) CH2 = CHCl
0%
c) C6H5Cl
0%
d) C6H5CH2Cl
Explanation
Answer:(d)
Q.30
Ethyl bromide reacts with sodium lead alloy to form?
0%
a) Tetraethyl lead
0%
b) Ethyl sodium
0%
c) Ethane
0%
d) Wthene
Explanation
Answer:(a)
0 h : 0 m : 1 s
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