Assertion :Ammonia sulphate is a better fertiliser than urea. Reason: Urea decomposes to give NH3 and CO2.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution
The correct option is D Assertion is incorrect but Reason is correct Ammonia sulphate (NH4SO4) only decomposes to Ammonia when the temperature is greater than 250oC(523K). This temperature cannot be produced in fields. But urea converts to ammonia and CO2 easily. So urea is better fertilizer.
NH2CONH2+H2O→NH2COONH4→2NH3+CO2
So, urea decomposes to ammonia and carbon dioxide.