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Question

The element A burns in nitrogen to give an ionic compound B. The compound B reacts with water to give C and D. A solution of C becomes milky on bubbling carbon dioxide. what is the nature of compound (D)?

A
Acidic
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B
Basic
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C
Amphoteric
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D
Neutral
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Solution

The correct option is D Basic
A burns, nitrogen−−−−−−−−BioniccompoundH2OC+CO2+Dmilkysolution
Since the solution of C becomes milky on bubbling CO2 into it, C is lime water (Ca(OH)2)). Thuss, the element A is calcium amd B is the compound of calcium with nitrogen. Nitrides on reacting with water give the corresponding hydroxide and ammonia. Therefore,
A is calcium (Ca)
B is Calcium nitride (Ca3N2)
C is lime water Ca(OH)2
D is ammonia (NH3)

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