ICSE Class 10 Chemistry 2015 Solved Paper

State one relevant observation for each of the following :

Question : 14 of 85

Marks: +1, -0

When crystals of copper nitrate are heated in a test tube.

Solution:

(1) Release reddish brown gas

{\NO}_2

(Nitrogen-di-oxide) which turns freshly prepared Ferrous Sulphate solution brown.
(2) The residue left is black copper oxide.

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