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Give a chemical test to distinguish between the pairs of compounds:

Calcium nitrate solution and zinc nitrate solution.

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Test Calcium Nitrate Solution Zinc Nitrate Solution
Ammonium hydroxide is added first dropwise and then in excess. No precipitation of Ca(OH)2 occurs even with addition of excess of NH4OH Gelatinous white ppt of Zn(OH)2 is formed which is soluble in excess of NH4OH.

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