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ICSE Class 10 Chemistry 2015 Solved Paper

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The following questions are pertaining to the laboratory preparation of hydrogen chloride gas :
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Question : 77
Total: 85
Write the equation for its preparation mentioning the condition required.
Solution:  
NaCl+
H2SO4
(Conc.)
<200∘C
─────▸
NaHSO4 +HCl
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