Alpha Elimination

Q.

Which of the following is an $\alpha$ - elimination reaction?

1. $CH{X}_3\underset{}{\overset{Alc.KOH/△}{\to }}:C{X}_2+\stackrel{\ominus }{X}+\stackrel{\oplus }{H}$

2. $C{H}_3-C{H}_2-C{H}_2-L\to C{H}_3-CH=C{H}_2+\stackrel{\oplus }{H}\stackrel{\ominus }{L}$

3. 

4. None of these

Q.

Which of the following is an $\alpha$ - elimination reaction?

1. None of these

2. $CH{X}_3\underset{}{\overset{Alc.KOH/△}{\to }}:C{X}_2+\stackrel{\ominus }{X}+\stackrel{\oplus }{H}$

3. $C{H}_3-C{H}_2-C{H}_2-L\to C{H}_3-CH=C{H}_2+\stackrel{\oplus }{H}\stackrel{\ominus }{L}$

4. 

Q. Predict the product from the given $E2$ reaction.

1. 
2. 
3. 
4. 

Q.

Which of the following is the $\alpha$ -carbon in

1. II

2. I

3. III

4. IV

Q. Predict the product from an $E_2$ reaction of the given compoound.

Q.

Which of the following is the $\alpha$ -carbon in

1. I

2. II

3. III

4. IV

Q.

Which of the following is the $\alpha$ -carbon in

1. I

2. II

3. III

4. IV