${\mathrm{O}}_2{\mathrm{NCH}}_2{\mathrm{CH}}_2{\mathrm{O}}^{-}$ 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:

An electrophile among the following is :

Which of the following reactions is an elimination reaction?

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 :
\(\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CH}\left(\mathrm{CH}_3\right)-\mathrm{CH}_2-\mathrm{CH}_3\\ ~~a~~~~~~~~~~~b~~~~~~~~~~~~~c~~~~~~~~~~~~~~~~~~~d~~~~~~~~~~~e\)

1. a

2. b

3. c

4. e 

In which of the following compounds, the carbon marked with an asterisk is most electronegative?

1. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-*{\mathrm{CH}}_2-{\mathrm{CH}}_3$

2. ${\mathrm{CH}}_3-*\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

3. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{C}\equiv *\mathrm{CH}$

4. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{CH}=*{\mathrm{CH}}_2$