Pair of groups exerting `(-I)` effect is
(A) `-NO_(2)`&`-CH_(3)`
(B) `-NO_(2)`&`-Cl`
(C) `-Cl`&`-CH_(3)`
(D) `-CH_(3)`&`-C_(2)H_(5)`

(CH_(3))_(3)C-ONa+C_(2)H_(5)Cl rarr (CH_(3))_(3)C-O-C_(2)H_(5) true or false?

How many bonds (sigma and pi ) are there in the following molecules? (i) H_(2)C=C=CH_(2) (ii) CH_(3)-C-=CH (iii) H_(2)C=CH-C-=N (iv) CH_(3)NO_(2) (v) CH_(3)OH (iv) C_(2)H_(2)

Arrange the following monomers in order of decreasing ability of undergo cationic polymerisation. (I) CH_(2)=CH-C_(6)H_(4)(NO_(2)) (II) CH_(2)=CH-(C_(6)H_(4)(CH_(3)) (III) CH_(2)=CH-C_(6)H_(4)(OCH_(3))

Write chemical equations for the following conversions : CH_(3)-CH_(2)-Cl into CH_(3)-CH_(2)-CH_(2)-NH_(2) C_(6)H_(5)-CH_(2)-Cl into C_(6)H_(5)-CH_(2)-CH_(2)-NH_(2)

Indicate the sigma & pi bonds in (i) CH_(2)Cl_(2) (ii) CH_(3)-C-=C-CH_(3)