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Question

On heating blue coloured powder of copper(II) nitrate in a boiling tube copper oxide (black), oxygen gas and a brown gas X is formed. What is the balanced chemical equation for the reaction?

A
2Cu(NO3)(s)Heat−−2CuO(s)+O2(g)+2NO2(g)
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B
Cu(NO3)2(s)Heat−−CuO(s)+NO2(g)
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C
2Cu(NO3)2(s)Heat−−2CuO(s)+O2(g)+4NO2(g)
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D
Cu(NO3)2(s)Heat−−Cu(s)+NO2(g)
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E
Cu(NO3)(s)Heat−−CuO(s)+NO2(g)
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Solution

The correct option is C 2Cu(NO3)2(s)Heat−−2CuO(s)+O2(g)+4NO2(g)
On heating blue coloured powder of copper(II) nitrate in a boiling tube copper oxide (black), oxygen gas and a brown gas named as X is formed . The brown gas is nitrogen dioxide. (NO2).
The balanced chemical equation is
2Cu(NO3)2(s)heat2CuO(s)+O2(g)+4NO2(g)
So the correct option is C

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