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Q.

Action of heat along with mixing of Sodium hydrogen phosphate is used to test

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a

Ca2+

b

Cu2+

c

Mg2+

d

Na+

answer is C.

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Detailed Solution

Take water extract and add 3-4 ml of magnesium mixture and wait for 5 minutes. A white ppt confirms Na2HPO4+MgNO32+NH3→MgNH4PO4↓+2NaNO3                                                                  White
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