The orbital picture of a triplet carbene can be drawn as

In the following species, the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is

When do positive and negative charges appear on a carbon atom? Give examples.

Assertion : Carbanions like ammonia have pyramidal shape.
Reason : The carbon atom carrying negative charge has an octet of electrons.

In which pairs,the first ion is more stable than the second?

The decreasing order of hydride affinity for the following carbocations is:
$A: CH_2=CH-C^+(CH_3)_2$
$B: (C_6H_5)_3C^+$
$C: (CH_3)_3C^+$
$D: (Cyclopropyl)_3C^+$
Choose the correct answer from the options given below: