The orbital picture of a triplet carbene can be drawn as

Among the given pairs,in which pair does the second compound have less enol content than the first compound?

Which of the following carbanions is the least stable?

Arrange the following carbanions in the decreasing order of stability:
$I. \ p-Br-C_6H_4-CH_2^-$
$II. \ C_6H_5-CH_2^-$
$III. \ p-CH_3O-C_6H_4-CH_2^-$
$IV. \ p-CHO-C_6H_4-CH_2^-$
$V. \ p-CH_3-C_6H_4-CH_2^-$
Choose the correct answer from the options given below:

The incorrect statement about carbene $(CH_2)$ is:

Which of the following carbocations is the most stable?