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ICSE Class 10 Chemistry 2017 Paper

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Write a balanced chemical equation for each of the following :
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Question : 20 of 86
Marks: +1, -0
Laboratory preparation of ammonia from ammonium chloride.
Solution:  
2NH4Cl+Ca(OH)2Ammonium chloride→CaCl2\underset{\text{Ammonium chloride}}{2\mathrm{NH}_4\mathrm{Cl}+\mathrm{Ca}(\mathrm{OH})_2} \rightarrow \mathrm{CaCl}_2 +2NH3↑+2H2O+2 \mathrm{NH}_3 \uparrow +2 \mathrm{H}_2\mathrm{O}
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