1.

Which of the following is not a chemical change?

Answer»

Passing of steam over redhot coke.
Colour change of DILUTE NITRIC ACID upon long standing.
Absorption of moisture by `P_(2)O_(5)`.
Absorption of moistureby `CaCl_(2)` .

Solution :Anhydrous`CaCl_(2)`absorbs moisture till it BECOMES saturated and CHANGES its physical state . Henceit is a deliquescent substance.


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