The order of stability of the following carbocations is:

(I)	(II)	(III)

1. I > II > III

2. III > I > II

3. III > II > I

4. II > III > I

In the Carius method for estimation of halogens, 250 mg of an organic compound gave 141 mg of AgBr. The percentage of bromine in the compound is:
(Atomic masses: Ag = 108, Br = 80)

29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia were absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is:

Out of the following, the alkene that exhibits optical isomerism is:
 
1. 2-Methyl-2-pentene
2. 3-Methyl-2-pentene
3. 4-Methyl-pentene
4. 3-Methyl-1-pentene

Given below are four statements about thiol anion \(\text{(RS}^{\ominus})\) and alkoxy anion \(\text{(RO}^{\ominus})\).
Which of the following statements is correct?

1. RS${}^{⊝}$ is less basic but more nucleophilic than RO${}^{⊝}$

2. RS${}^{⊝}$ is more basic and more nucleophilic than RO${}^{⊝}$

3. RS${}^{⊝}$ is more basic but less nucleophilic than RO${}^{⊝}$

4. RS${}^{⊝}$ is less basic and less nucleophilic than RO${}^{⊝}$

The distillation technique most suited for separating glycerol from spent-lye in the soap industry is :

1. Steam distillation
2. Distillation under reduced pressure
3. Fractional distillation
4. Differential extraction

The correct order of decreasing stability of the following is:
\(\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{-}, ^{-}\mathrm{CCl}_3,\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{-}, \mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2^{-}\)

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is:

1. –SO₃H, –COOH, –CONH₂, –CHO

2. –CHO, –COOH, –SO₃H, –CONH₂

3. –CONH₂, –CHO, –SO₃H, –COOH 

4. –COOH, –SO₃H, –CONH₂, –CHO

For the estimation of nitrogen, 1.4 g of an organic compound was digested by the Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is:

1. 10%

2. 3%

3. 5%

4. 6%

Use the provided information in the following paper chromatogram.

Figure: Paper chromatography for compounds A and B.

The R_f value of A is Y×10^–1. The value of Y is: