RRB Group D Model Paper 13 EM

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Question : 51 of 100

Marks: +1, -0

What is the formula for Plaster of Paris?

$\mathrm{CH_3COOH}$
$\mathrm{(NH_4)_2SO4}$
$\mathrm{CaSO_4 \cdot \frac{1}{2}H_2O}$
CaSO4

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