Elevation in Boiling Point
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(Given: Molal elevation constant for water =0.52K kg mol−1)
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)
242.32 g/mol
79.42 g/mol
132.32 g/mol
177.42 g/mol
Pressure cooker reduces cooking time for food because:
- Cooking involves chemical changes helped by a rise in temperature
- Heat is more evenly distributed in the cooking space
- Boiling point of water involved in cooking is increased
- The higher pressure inside the cooker crushes the food material
Which of the following aqueous solutions, containing 10 gm of solute in each case, has highest boiling point?
NaCl solution
KCl solution
Sugar solution
Glucose solution
Which of the following statements is correct for the boiling point of solvent containing a dissolved solid substance
- Boiling point of the liquid is depressed
- Boiling point of the liquid is elevated
- There is no effect on the boiling point
- The change depends upon the polarity of liquid
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)
600
120
60
180
If the solution boils at a temperature T1 and the solvent at a temperature T2 the elevation of boiling point is given by
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