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Q.

Which of the following is true ?

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a

Sodium when heated in excess of oxygen gives sodium oxide

b

Oxidation state of oxygen in KO2 is -1

c

Sodium amalgam is better reducing agent than hydrogen

d

Sodium nitrate on heating gives nitrogen dioxide.

answer is C.

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Detailed Solution

In (1) sodium peroixde is produced, (2)oxidation State of oxygen in KO2 is -1/2,  (d) Sodium nitrate does not produce NO2.
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Which of the following is true ?