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Q.

The formula of Ammonium Sulphate is __________.
 

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a

(NH4)2SO4

b

NH2SO4

c

NH4SO2

d

NH4SO4

answer is C.

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Detailed Solution

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The charge on NH4​ (ammonium ion) is +1 and the charge on SO4​ (sulphate ion) is -2. According to the crisscross method, the numerical value of the ion charge of the two atoms is crossed over, which becomes the subscript of the other ion.  So, the molecular formula of ammonium sulphate is (NH4​)2​SO4​.

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