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Give two tests for dilute sulphuric acid with balanced equations. State why 

(1) BaCl

(2) Pb(NO3 )2 are used for the above tests.

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1. Barrium chloride solution on treating with dilute sulphuric acid forms white ppt. of barium sulphate, which is insoluble in all acids 

BaCl2 + H2SO4 (dil) → 2HCl + BaSO4 ↓ 

2. Lead nitrate on treating with dilute sulphuric acid forms white ppt of lead sulphate, which is insoluble in all acids. 

Pb (NO3)2 + H2SO4 (dil) → 2HNO3 + PbSO4

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