Give one most important application of the phenomena of depression in freezing point in every day life.

Give one important ore of aluminium?

Give one application of infrared.

Give one application of X-rays.

Show that (i) elevation in boiling point is a colligative property (ii) depression in freezing point is a colligative property and (iii) osmotic pressure is a colligative property?

Give one application for the following poly-halogen compounds Freons.

Relative lowering of vapour pressure, elevation of boiling point, depression of freezing point and osmotic pressure are important colligative properties of dilute solutions. Relative lowering of vapour pressure of an aqueous dilute solution of glucose is 0.018 What is the mole fraction of glucose in the solution ?

solution exhibit certain colligative properties such as elevation in boiling point, depression in freezing point , osmotic pressure. Cold ethylene glycol is added to radiator in vehicles. Which colligates property of water is involved in doing this ? Explain.

Assertion : Larges the value of cryoscopic constant of the solvent lesser will be the freezing point of the solution Reason : Depression in the freezing point depends on the nature of the solvent. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). c)If (A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.