+R Effect

Q. Which of the following group will show $+R$ effect?

1. $-CHO$
2. $-N{H}_2$
3. $-N{O}_2$
4. $-COC{H}_3$

Q. The least stable resonating structure of phenol is :

1. $\left(III\right)$
2. $\left(I\right)$
3. $\left(IV\right)$
4. $\left(II\right)$

Q. Which of the following group(s) show $+M$ effect?

1. $-\stackrel{-}{C}{H}_2$
2. $-NHCOR$
3. $-O^{-}$
4. $-OH$

Q. How many resonating structures are possible for chlorobenzene?

1. 6
2. 5
3. 3
4. 4

Q. Which of the following group(s) show $+M$ effect?

1. $-\stackrel{-}{C}{H}_2$
2. $-NHCOR$
3. $-O^{-}$
4. $-OH$

Q. The total number of resonating structure of phenoxide ion :

1. 5
2. 6
3. 4
4. 3

Q. The least stable resonating structure of phenol is :

1. $\left(III\right)$
2. $\left(I\right)$
3. $\left(IV\right)$
4. $\left(II\right)$

Q. The correct order of $+M$ effect of ${}^{\prime }{N}^{\prime }$ containing functional group on benzene ring, amongst the given compounds is

(I) (II)
(III)
(IV)

1. $I>II>IV>III$
2. $II>I>III>IV$
3. $I>II>III>IV$
4. $IV>III>II>I$

Q. Which of the following group(s) shows $+M$ effect ?

1. $-N{H}_2$
2. $-OR$
3. $-COR$
4. $-COOH$

Q.

The movement of electrons in which one of the structure is not shown correctly?

1. 

2. 

3. 

4. 

Q. Which of the following group will show $+R$ effect?

1. $-CHO$
2. $-N{H}_2$
3. $-N{O}_2$
4. $-COC{H}_3$

Q. Arrange the following compounds in increasing reactivity with $C{H}_{3}ONa$.

1. $I<II<III$
2. $III<II<I$
3. $II<III<I$
4. $I<III<II$

Q. The correct order of $+M$ effect of ${}^{\prime }{N}^{\prime }$ containing functional group on benzene ring, amongst the given compounds is

(I) (II)
(III)
(IV)

1. $I>II>IV>III$
2. $II>I>III>IV$
3. $I>II>III>IV$
4. $IV>III>II>I$

Q. Arrange the following compounds in increasing reactivity with $C{H}_{3}ONa$.

1. $I<II<III$
2. $III<II<I$
3. $II<III<I$
4. $I<III<II$