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Acids,Bases and Salts — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryAcids,Bases and Salts3 Marks
Question
What is observed when :
(i) Hydrogen sulphide gas is passed through lead acetate solution?
(ii) Neutral litmus solution is added to sodium hydrogen carbonate solution?
(iii) A small piece of iron is placed in copper sulphate solution?
✓

Answer

(i) A black precipitate of lead (II) sulphide is formed.
(ii) The colour of litmus solution changes to blue colour.
(iii) The piece of iron is coated with reddish deposit of copper.

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