Q.

Which salt on heating does not give brown coloured gas is

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a

LiNO3

b

KNO3

c

MgNO32

d

BaNO32

answer is B.

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Detailed Solution

2KNO3→  2KNO2+O2All other nitrates give metal oxide, oxygen and nitrogen dioxide(reddish-brown).
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Which salt on heating does not give brown coloured gas is