1.

Assertion :- Elevation in boiling point and depression in freezing point are colligative properties. Reason :- All colligative properties are used for the calculation of molecular masses.

Answer»

If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Solution :Elevation in BOILING point and depression in freezing point are COLLIGATIVE properties because both depend only on the NUMBER of particles (ions or molecules) of the solute in a difinite AMOUNT of the SOLVENT but not on the nature of thesolute.


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