Organic Chemistry – Some Basic Principles And Techniques
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Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl
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gets oxidised by oxalic acid to chlorine
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furnishes H+ions in addition to those from oxalic acid
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reduces permanganate to Mn2+
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oxidises oxalic acid to carbon dioxide and water
C.
reduces permanganate to Mn2+
HCl being stronger reducing agent reduces MnO4− to Mn2+ and result of the titration becomes unsatisfactory.
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An organic compound having molecular mass 60 is found to contain C = 20%, H = 6.67% and N = 46.67% while rest is oxygen. On heating, it gives NH3 along with a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. The compound is
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CH3NCO
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CH3CONH2
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(NH2)2CO
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CH3CH2CONH2
C.
(NH2)2CO
CH3Br + Nu- → CH3 -Nu +Br-
The decreasing order of the rate of the above reaction with nucleophiles (Nu–) A to D is
[Nu–=
(A) PhO–
(B) AcO–
(C) HO–
(D) CH3O–
]
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D > C > A > B
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D > C > B > A
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A > B > C > D
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B > D > C > A
A.
D > C > A > B
Due to the presence of an unpaired electron, free radicals are:
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Chemically reactive
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Chemically inactive
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Anions
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Cations
A.
Chemically reactive
For which of the following molecule significant μ≠ 0?
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only a
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a and b
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Only c
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c and d
D.
c and d
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Mock Test Series
Mock Test Series