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JEE Main levelSingle correct optionDifficulty 2 of 3pn069

Which one of the following does NOT liberate dioxygen on strong heating?

A $KNO X_{3}$
B $HgO$
C $KMnO X_{4}$
D $CaCO X_{3}$

Answer: D

CaCO X_{3}

gives

CaO

and

CO X_{2}

.

HgO

gives

Hg

and

O X_{2}

,

KMnO X_{4}

gives

K X_{2} MnO X_{4}

,

MnO X_{2}

and

O X_{2}

, and

KNO X_{3}

gives

KNO X_{2}

and

O X_{2}

.

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