______ carbon atom is the one which is directly attached to two other carbon atoms .

In isoalkanes , one of the carbon atom is attached to ____ other carbon atom (s) .

In a diamond. each carbon atom is bonded to:
A) two other carbon atoms
B) three other carbon atoms
C) four other carbon atoms
D) five other carbon atoms

(A) $\alpha$-hydrogen atom of carbonly compouns is acidic in nature.
(R) beta-hydrogen is directly attached to carbon to next to carbonyl carbon

A compound , in which the OH group is directly attached to the carbon atom of the benzene ring is called

Assertion: 2,2-Dimethylbutane does not have any tertiary carbon atom.
Reason: Tertiary carbon atom is attached to three carbon atoms.

"An alcohol contains one or more hydroxyl-OH groups directly attached to carbon atom(s), of an aliphatic system while a phenol contains -OH group directly attached to carbon atom(s) of an aromatic system."
The above statement is ……

Assertion : $\beta$- hydrogen atom of carbonyl compounds is acidic in nature.
Reason : $\beta$- hydrogen is directly attached to carbon next to carbonyl carbon.

In _________ alcohols , the -OH group is attached to a $s{p}^2$ hybridised carbon atom.

When two halogen atoms are attached to same carbon atom then it is :

A hydrocarbon $\left(R\right)$ has six membered ring in which there is no unsaturation. Two alkyl groups are attached to the ring adjacent to each other. One group has $3$ carbon atoms with branching at $1^{st}$ carbon atom of chain and another has $4$ carbon atoms. The larger alkyl group has main chain of three carbon atoms of which second carbon is substituted. Number of $2^{\circ }$ carbons in $R$ are: