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ICSE Class 10 Chemistry Question 2 of 19

Solved 2017 Question Paper ICSE Class 10 Chemistry — Question 8

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8
Question

Question 1(d)

Write a balanced chemical equation for each of the following:

(i) Action of cold and dilute Nitric acid on Copper.

(ii) Reaction of Ammonia with heated copper oxide.

(iii) Preparation of methane from iodomethane.

(iv) Action of concentrated sulphuric acid on Sulphur.

(v) Laboratory preparation of ammonia from ammonium chloride.

Answer

(i) 3Cu + 8HNO3 [dil.] ⟶ 3Cu(NO3)2 + 4H2O + 2NO [g]

(ii) 2NH3 + 3CuO ⟶ 3Cu + 3H2O + N2 [g]

(iii)
CH3Imethyl iodide+2[H]nascent hydrogen→alcoholZn/Cu coupleCH4methane+HI\underset{\text{methyl iodide}}{\text{CH}_3\text{I}} + \underset{\text{nascent hydrogen}}{2\text{[H]}} \xrightarrow[\text{alcohol}]{\text{Zn/Cu couple}} \underset{\text{methane}}{\text{CH}_4} +\text{HI}

(iv) S + 2H2SO4 (conc.) ⟶ 3SO2 + 2H2O

(v) 2NH4Cl + Ca(OH)2 ⟶ CaCl2 + 2H2O + 2NH3