${\mathrm{O}}_2{\mathrm{NCH}}_2{\mathrm{CH}}_2{\mathrm{O}}^{-}$ is more stable than ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{O}}^{-}$ because :

1.	NO2 shows +I effect
2.	NO2 shows -I effect
3.	NO2 decreases the positive charge on the compound
4.	Ethyl group increases positive charge on the compound

Alkyl groups act as electron donors when attached to a π system due to-
1. Inductive effect
2. Mesomeric effect
3. Resonance
4. Hyperconjugation

An electrophile among the following is -

Elimination reaction among the following is-
 

Geometrical isomerism can be shown by:

1.
2.
3.
4.

Free radical formation will take place in :

1.
2.
3.
4.

The effect that can explain the given order of acidity of the carboxylic acids is-

Cl₃CCOOH > Cl₂CHCOOH > ClCH₂COOH

1. +I effect

2. -I effect

3. +E effect

4. -E effect

The purification method based on the difference in solubilities of the compound and the impurities in a solvent is -
1. Crystallisation
2. Distillation
3. Chromatography
4. Isolation

The 3° carbon atom in the given structure is :

${\mathrm{H}}_3\mathrm{C} – {\mathrm{CH}}_2 – \mathrm{CH}\left({\mathrm{CH}}_3\right) – {\mathrm{CH}}_2 – {\mathrm{CH}}_3$
$\mathrm{a} \mathrm{b} \mathrm{c} \mathrm{d} \mathrm{e}$  

1. a

2. b

3. c

4. e 

The most stable carbocation among the following is-
1. \(({CH_3})_3C\overset{+}{C}H_2\)
2. \(({CH_3})_3\overset{+}{C}\)
3. \({CH_3}CH_2\overset{+}{C}H_2\)
4. \(({CH_3})\overset{+}{C}HCH_2CH_3\)