Elevation in Boiling Point

Q. If a compound $AB$ dissociates to the extent of $75\%$ in an aqueous solution, the molality of the solution which shows a $1.82\text{K}$ rise in the boiling point of the solution is
(Given: Molal elevation constant for water $=0.52{\text{K kg mol}}^{-1}$)

Q.

Boiling point of chloroform was raised by 0.323 K, when 0.5143 g of anthracene was dissolved in 35 g of chloroform. Molecular mass of anthracene is(= 3.9 kg mol^-1)

1. 242.32 g/mol

2. 79.42 g/mol

3. 132.32 g/mol

4. 177.42 g/mol

Q.

Pressure cooker reduces cooking time for food because:

1. Cooking involves chemical changes helped by a rise in temperature
2. Heat is more evenly distributed in the cooking space
3. Boiling point of water involved in cooking is increased
4. The higher pressure inside the cooker crushes the food material

Q.

Which of the following aqueous solutions, containing 10 gm of solute in each case, has highest boiling point?

1. NaCl solution

2. KCl solution

3. Sugar solution

4. Glucose solution

Q.

Which of the following statements is correct for the boiling point of solvent containing a dissolved solid substance

1. Boiling point of the liquid is depressed
2. Boiling point of the liquid is elevated
3. There is no effect on the boiling point
4. The change depends upon the polarity of liquid

Q.

Elevation in boiling point was 0.52⁰C when 6gm of a compound X was dissolved in 100 gm of water. Molecular weight of X is (K⁰ for water is 0.52 per 1000 gm of water)

1. 600

2. 120

3. 60

4. 180

Q.

If the solution boils at a temperature T₁ and the solvent at a temperature T₂ the elevation of boiling point is given by

1. 

2. 

3. 

4. 

Q.

The molal boiling point constant for water is . When 0.1 mole of sugar is dissolved in 200 ml of water, the solution boils under a pressure of one atmosphere at

1. 
   

2. 
   

3. 
   

4. 
   

Q.

Which one of the following would produce maximum elevation in boiling point?

1. 0.1 M glucose

2. 0.2 M glucose

3. 0.1 M barium chloride

4. 0.1 M magnesium sulphate

Q.

If for a sucrose solution, elevation in boiling point is 0.1°C then what will be the boiling point of NaCl solution for same molal concentration

1. 

2. 

3. 

4.