The correct(s) order among the following concerning the –I effect of the substituents:
(R= alkyl)

a. -${\mathrm{NH}}_2$$<-\mathrm{OR}<-\mathrm{F}$$$

b. $-{\mathrm{NR}}_2<-\mathrm{OR}<-\mathrm{F}$

c. $-{\mathrm{NH}}_2>-\mathrm{OR}>-\mathrm{F}$

d. $-{\mathrm{NR}}_2>-\mathrm{OR}>-\mathrm{F}$

1.	Both b and d	2.	Both a and c
3.	Both a and b	4.	Both d and a

The hybridised state of C in $\stackrel{\oplus }{\mathrm{C}}{H}_5$ is 

1. $\mathrm{sp}$

2. ${\mathrm{sp}}^2$

3. ${\mathrm{sp}}^3$

4. ${\mathrm{sp}}^3\mathrm{d}$

Which alkene has smallest heat of hydrogenation ?

The correct order of abstraction of hydrogen toward homolytic fission is:

1. 2 > 4 > 3 > 5 > 1

2. 4 > 2 > 5 > 3 > 1

3. 4 > 2 > 3 > 5 > 1

4. 4 > 3 > 2 > 5 > 1

Consider the following resonating structures of HCOOH

The order of stability is-

The correct order of the rate of expulsion of hydrogen as ${\mathrm{H}}^{+}$ in the above figure is:

1. 1 > 2 > 3

2. 2 > 3 > 1

3. 2 > 1 > 3

4. 3 > 2 > 1

Which alkene is most stable ?

1. ${\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

2. ${\left({\mathrm{CH}}_3\right)}_{3}C-CH=C{H}_2$

3. ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

4. ${\left({\mathrm{CH}}_3\right)}_{2}C=C{\left(C{H}_3\right)}_2$

The aromatic compound among the following is :

Which of the following carbocations is the most stable?

1.		2.	\(\mathrm{(CH}_3){ }_3 \stackrel{\oplus}{\mathrm{C}}\)
3.	\(\mathrm{CH}_2=\mathrm{CH}-\stackrel{\oplus}{\mathrm{C}\mathrm{H}_2}\)	4.	\(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C H}}\)

Which hydrocarbon is most acidic ?