1.

When solid SnO_2 is added to an aqueous solution of NaOH, the

Answer»

VAPOUR pressure is lowered.
vapour pressure is raised.
osmotic pressure is increased.
BOILING point is raised.

Solution :`2Na^(+)(aq)+ 2OH^(-) (aq) + SnO_2(s) to 2Na^(+) (aq) + SnO_3^(-2) (aq) + H_2O`
The number of ions decreases in the ratio of 4 to 3, and so ALSO the colligative property.


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