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ICSE Class 10 Chemistry 2018 Paper

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Name the gas that is produced in each of the following cases :
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Question : 31 of 80
Marks: +1, -0
Action of dilute hydrochloric acid on sodium sulphide.
Solution:  
(ii) Hydrogen sulphide
Na2S+2 HCl  (dil.)  →H2S↑+2 NaCl\mathrm{Na}_2\mathrm{S}+2\,\mathrm{HCl}\;\text{(dil.)}\;\rightarrow \mathrm{H}_2\mathrm{S}\uparrow+2\,\mathrm{NaCl}
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