Question

19. Among the following resonating structures
8
0
(1) H-C-0-H (II) H-C=0-H
H-H
8
8
(III) H-C-0-H
C
(IV) H-0-0-H
The correct order of stability is
(1) III <II <IV <I (2) II <III <IV <I
(3) III <IV <II <I (4) IV <III <II <I

20. Which of the following carbocation is most stable?
(1) (CH),
(2) (Phy),
(3)
(4)
DA
21. Arrange the stability of the carbocation in decreasing
order,
+
(1) CH30
CH2 (2) HO О
CH2
(3) HN
CH2
(4) CIO
CH2
W.

22. Which of the following compounds is resistant to
nucleophilic attack by OH-ions?
(1) methyl acetate
(2) acetonitrite
(3) dimethyl ether (4) acetamide
ts
OH with

23. The reaction of CH3 CH = CHO
HBr gives
OH
(1) CH3CHBCH2
OH
(2) CH3CH2CHBr
Br
(3) CH3CHBCH2
Br
O
(4) CH3CH2CHBO

24. In the following groups
(1) 0-A1
(II) OME
(III) OSO,Me
(IV) OSO,CF3
The order of leaving group ability is
(1) I>II > III > IV (2) IV > III > I > II
(3) III > II >I>IV (4) II > III > IV > I​

Answer 1

Answer:

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