Index of unsaturation (H-deficiency)of`C_(8)H_(10)` is…and if it has a six-member ring, it can be:

Index of unsaturation (H-deficiency ) of C_8 H_(10) is ........ and if it has a six-membered ring , it can be :

The index of hydrogen deficiency in C_20H_20O_2 is

Number of fused six membered rings in sterol ?

The number of aromatic isomers for C_(8)H_(10)

Degree of unsaturation of C_9H_12 is …............

Degree of unsaturation of C_9H_12 is …............

An organic compound 'X' ( molecular formula C_(6 ) H_(5) O_(2)N ) has a six- membered carbocyclic ring with alternating single and double bonds and -NO_(2) group as a substituent . The compound 'X' is _______.

" How many isomers of "C_(1)H_(8)O" exists that has a phenyl ring? "