The correct order of the leaving group ability is:

1. \(\text{ OCOC}_2\text{H}_5~\)>\(\text{OC}_2\text{H}_5\) >\(\text {OSO}_2\text{Me}\) > \(\text {OSO}_2\text{CF}_3\)
2.  \(\text{OC}_2\text{H}_5\) > \(\text{ OCOC}_2\text{H}_5~\)> \(\text {OSO}_2\text{CF}_3\) > \(\text {OSO}_2\text{Me}\)
3.  \(\text {OSO}_2\text{CF}_3\) > \(\text {OSO}_2\text{Me}\) > \(\text{ OCOC}_2\text{H}_5~\) > \(\text{OC}_2\text{H}_5\)
4. \(\text{ OCOC}_2\text{H}_5~\)>\(\text {OSO}_2\text{CF}_3\) > \(\text{OC}_2\text{H}_5\) > \(\text {OSO}_2\text{Me}\)

What is the correct sequence of acidity for the following compounds?

which one of the following has the most acidic nature?

1.		2.
3.		4.

The correct order of acidity among the following is:

1. CH₂=CH₂ >CH≡CH > CH₃C≡CH > CH₃-CH₃

2. CH≡CH > CH₃-C≡CH > CH₂=CH₂ >CH₃-CH₃

3. CH≡CH > CH₂=CH₂ > CH₃-C≡CH > CH₃-CH₃

4. CH₃-CH₃ > CH₂=CH₂ > CH₃-C≡CH > CH≡CH

The compound that is most difficult to protonate is:

1.		2.
3.		4.