IUPAC name of the compound given below is:

1.	4-Ethyl-3-methyloctane	2.	3-Methyl-4-ethyloctane
3.	2, 3-Diethylheptane	4.	5-Ethyl-6-methylocatane

Pairs of compounds among the following is a pair of enantiomers:

1.
2.
3.
4.

The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II), and nitrobenzene (III) is:

1. III > II > I

2. II > III > I

3. I < II > III

4. I > II > III

Which of the following orders of acid strength is correct:

1. RCOOH > ROH > HOH > HC ≡ CH

2. RCOOH > HOH > ROH > HC ≡ CH

3. RCOOH > HOH > HC ≡ CH > ROH

4. RCOOH > HC ≡ CH > HOH > ROH

The correct IUPAC name, among the following, is:

Which of the following statements is correct?

During steam distillation, an organic compound vaporizes when the total vapor pressure of the immiscible mixture (organic compound + water) equals the ambient pressure. This process causes the organic compound to vaporize at a temperature that is:

1. The same as its normal boiling point.

2. Lower than its normal boiling point.

3. Higher than its normal boiling point.

4. Independent of its normal boiling point.

An organic compound contains 69% carbon, and 4.8% hydrogen, the remainder being oxygen. The masses of carbon dioxide, and water produced when 0.20 g of this substance is subjected to complete combustion would be respectively -

1. 0.506 g, 0.0864 g

2. 0.906 g, 0.0864 g

3. 0.0506 g, 0.864 g

4. 0.0864 g, 0.506 g

A sample of 0.50 g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50 mL of 0.5 M ${\mathrm{H}}_2{\mathrm{SO}}_4$. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralization. The percentage composition of nitrogen in the compound is:

In the organic compound
$$CH₂=CH–CH₂–CH₂–C≡CH, which pair of hybridized orbitals is involved in forming the C₂–C₃ bond?
1. sp – ${\mathrm{sp}}^2$ 

2. sp – ${\mathrm{sp}}^3$

3. ${\mathrm{sp}}^2$ – ${\mathrm{sp}}^3$

4. ${\mathrm{sp}}^3$ – ${\mathrm{sp}}^3$