When copper [II] nitrate is heated in a hard glass test tube:(i) State

1.	When copper [II] nitrate is heated in a hard glass test tube:(i) State the colour change in crystal on heating.(ii) State the colour of gas evolved which turns KI paper brown.(iii) the coulourless gas evolved on heating turns a colourless solution brown when absorbed in it name the colourless solution (iv) give balanced equation for the reaction
Answer» ANSWER: black residue left. reddish brown fumes alkaline PYROGALLOL solution 2Cu(NO3)2(s) → 2CuO(s) + 4NO2(G) + O2(g).

When copper [II] nitrate is heated in a hard glass test tube:(i) State the colour change in crystal on heating.(ii) State the colour of gas evolved which turns KI paper brown.(iii) the coulourless gas evolved on heating turns a colourless solution brown when absorbed in it name the colourless solution (iv) give balanced equation for the reaction

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