ICSE Class 10 Chemistry 2018 Solved Paper
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Give a chemical test to distinguish between the following pairs of chemicals :
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Question : 73
Total: 80
Lead nitrate solution and Zinc nitrate solution
Solution:
Lead nitrate and Zinc nitrate solutions can be distinguished by adding Ammonium hydroxide solution till in exess.
On adding few drops ofNH 4 OH
If Chalky white ppt→
If Gelatinous whiteppt →
On adding excessNH 4 OH
Chalky white ppt remains insoluble confirming the presence of lead nitrate
Gelatinous white ppt dissolves confirming the presence of zinc nitrate.
On adding few drops of
If Chalky white ppt
If Gelatinous white
On adding excess
Chalky white ppt remains insoluble confirming the presence of lead nitrate
Gelatinous white ppt dissolves confirming the presence of zinc nitrate.
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