Question

Which of the following reaction is characterised by the release of brown 1 fumes?

(a) Zn + H2SO4 ZnSO4 + H2

(b) Na2CO3 + H2SO4 Na2SO4 + H2O + CO2

(c) 2Pb(NO3)2 2PbO + 4NO2 + O2

(d) 2Ca(NO3)2 2CaO + 2NO2 + O2

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Answer 1

Answer:

option (b)

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