The nitrate which on thermal decomposition ...

ICSE Class 10 Chemistry 2023 Paper

SECTION - I

Choose the correct answers to the questions from the given options.

Question : 9 of 88

Marks: +1, -0

The nitrate which on thermal decomposition leaves behind a residue which is yellow when hot and white when cold:

Solution:

(d) Zinc nitrate

Explanation:

\;2 \mathrm{Zn}(\mathrm{NO}_3)_2 \xrightarrow{\Delta} \; \underset{\text{Pale yellow Hot}}{2 \mathrm{ZnO}}

+4 \mathrm{NO}_2 \uparrow \; + \mathrm{O}_2 \uparrow

On cooling it changes to white due to formation of zinc nitrate hexahydrate.

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