Which of the following are used as fertilizers?

$N H_{4} N O_{3}$

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$C a_{3} (P O_{4})_{3}$

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$C a (H_{2} P O_{4})_{2}$

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$C a N C N$

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Solution

The correct options are
A
$N H_{4} N O_{3}$

C
$C a (H_{2} P O_{4})_{2}$

D
$C a N C N$

Among the given compounds, Calcium cyanamide is a well-known fertilizer. On hydrolysis, it yields ammonia slowly (over days or even weeks).

$C a N C N + 3 H_{2} O ⟶ 2 N H_{3} + C a C O_{3}$

In addition to ammonium nitrate $N H_{4} N O_{3}$ , monocalcium phosphate $C a H_{2} P O_{4})_{2}$ is also used as a fertilizer.

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