Distinguish by dilute sulphuric acid. Copper and magnesium.

Question

KnowledgeBoat · Accepted Answer

Magnesium on reaction with dil. sulphuric acid produces a colourless, odourless gas with brisk effervescence. The gas evolved is hydrogen as it burns with a pale blue flame producing a pop sound. Copper does not react with dil. sulphuric acid liberating hydrogen as it is lower in metal reactivity series than hydrogen.

Column A	Column B
(a) Pb(NO₃)₂	(i) rotten egg smell
(b) CO₂	(ii) burns with a pop sound
(c) (NH₄)₂Cr₂O₇	(iii) suffocating smell of sulphur
(d) HCl	(iv) lime water turns milky
(e) NO₂	(v) crackling sound
(f) O₂	(vi) residue swells up
(g) H₂	(vii) brown gas
(h) H₂S	(viii) supports combustion
(i) SO₂	(ix) fumes with NH₃ solution

Chemistry

Distinguish by dilute sulphuric acid.
Copper and magnesium.

Practical Chemistry

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