ICSE Class 10 Chemistry 2013 Solved Paper

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State two relevant observations for each of the following :
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Question : 50
Total: 84
Ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess.
Solution:  
(a) When added in small quantities is forms a gelatinous white ppt.
(b) When added in excess it dissolves to form a complex salt.
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