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ICSE Class 10 Chemistry 2023 Paper

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Choose the substances given in the box below to answer the following questions:
 Iron  Magnesium  Zinc  Sodium sulphide
 Lead  Ferric chloride  Copper  Ferroussulphate
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Question : 66 of 88
Marks: +1, -0
The solution of this compound produces dirty green precipitate with NaOH\mathrm{NaOH}.
Solution:  
Ferrous sulphate:
 FeSO4+2 NaOHFerrous sulphate→Fe(OH)2+Na2SO4Ferrous hydroxide green ppt.\,\underset{\text{Ferrous sulphate}}{\mathrm{FeSO}_4 + 2\,\mathrm{NaOH}} \rightarrow \underset{\text{Ferrous hydroxide green ppt.}}{\mathrm{Fe}(\mathrm{OH})_2 + \mathrm{Na}_2\mathrm{SO}_4}
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