CBSE
Multiple Choice QuestionsIdentify the major product 'X' obtained in the following reaction.
2, 3-dimethyl butan-2-ol X
Which of the following statement is correct ?
+I group stabilises a carbocation
+I group stabilises a carbanion
-I group stabilises a carbocation
-I group stabilises a free radical
t-butyl chloride preferably undergo hydrolysis by
SN1 mechanism
SN2 mechanism
Any of (a) and (b)
None of these
Which of the following can give a Grignard reagent when reacted with magnesium in dry ether?
C2H6
C2H5Cl
C2H5OH
C2H5CN
Addition ofwater to alkynes occurs in acidic medium and in the presence of Hg2+ ions as a catalyst. Which of the following products will be formed on addition of water to but-1-yne under these conditions?
CH3CH2CH2CHO
CH3CH2COCH3
CH3CH2COOH
CH3COOH + HCHO
Which one of the following acts as a nucleophile?
(CH3)3N
BF3
O2
CH3CHO +HCHO A B
The structure of compound B is
Which one of these is not true for benzene?
It forms only one type of mono-substituted product
There are three carbon-carbon single bonds and three carbon-carbon double bonds
Heat of hydrogenation of benzene is less than its theoretical value
The bond angle between carbon-carbon bonds is 120°
Iodoform gives a precipitate with AgNO3 on heating but chloroform does not because
C - I bond in iodoform is weak and C - Cl bond in chloroform is strong
chloroform is covalent
iodoform is ionic
None of the above
Which of the following compounds have highest melting point?
Only I
Only II
I and II
II and III
