The type of structural isomerism shown by given compounds is:

${\mathrm{CH}}_3-\mathrm{S}-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_3$ and 

1.	Tautomerism	2.	Positional isomerism
3.	Functional isomerism	4.	Ring Chain isomerism

 

If a liquid compound decomposes at or below its boiling point, then the best method for purification is-

1. Distillation under reduced pressure

2. Azeotropic distillation

3. Gas chromatography

4. Sublimation

The most stable carbanion species among the following is:

The resonance hybrid structure will not exist for: 
a. CH₃OH
b. R - CONH₂
c. CH₃CH = CHCH₂NH₂

Compare the stability of the two resonating structures given below and mark the correct option:

1. (I)  is more stable than (II)

2. (II) is more stable than (I)

3. (I) and (II) both have the same stability 

4. None of the above

Find the percentage of carbon in 0.26 g of an organic compound which gives 0.245 g of CO₂ and 0.039 g of H₂O on combustion.

1. 35%

2. 25%

3. 2%

4. 90%

In an estimation of sulphur by the carius method, 0.2175 g of the substance gave 0.5825 g of BaSO₄ . The percentage composition of S in the compound is-

1. 66%

2. 20%

3. 37%

4.82%

0.284 g of an organic substance gave 0.287 g AgCl in a carius method for the estimation of halogen. The percentage of Cl in the compound is-

1. 5%

2. 18%

3. 25%

4. 33%

0.24 g of an organic compound containing phosphorous gave 0.66 g of Mg₂P₂O₇ by the usual analysis. The percentage of phosphorous in the compound is:

1. 77%

2. 72%

3. 87%

4. 60 %