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ICSE Class 10 Chemistry 2013 Solved Paper

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Give a chemical test to distinguish between the following pairs of compounds :
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Question : 22
Total: 84
Calcium nitrate solution and zinc nitrate solution.
Solution:  
Add NaOH solution to both the solutions. White ppt. observed with Zn(NO3)2 solution which is soluble in excess of NaOH. Whereas white ppt. observed with Ca(NO3)2 which is sparingly soluble in water.
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