The correct order of stability for the following alkoxides is:
$(A)$ $CH_3CH(NO_2)O^-$
$(B)$ $CH_2=C(NO_2)O^-$
$(C)$ $O_2N-CH=CH-O^-$

Identify the functional group that has electron donating inductive effect.

State True or False for the following statements regarding the $-NO_2$ group in nitrobenzene:
$(i)$ In resonance,it acts as an electron-donating group,and in the inductive effect,it acts as an electron-attracting group.
$(ii)$ It acts as an electron-donating group in both resonance and the inductive effect.
$(iii)$ It acts as an electron-attracting group in both resonance and the inductive effect.
$(iv)$ It acts as an electron-attracting group in resonance and an electron-donating group in the inductive effect.

Which of the following orders correctly depicts the decreasing order of stability of carbanion?

Negative inductive effect ($-I$ effect) is shown by:

The increasing order of the electron-withdrawing power of the following functional groups is:
a. $-CN$
b. $-COOH$
c. $-NO_2$
d. $-I$