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Reaction with Metals

The differenc...

Question

The difference of water molecules in gypsum and plaster of Paris is:

A

\frac{5}{2}

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B

2

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C

\frac{1}{2}

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D

1 \frac{1}{2}

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Solution

The correct option is D $1 \frac{1}{2}$
Gypsum: $C a S O_{4} .2 H_{2} O$ and

Plaster of Paris: $C a S O_{4} \frac{1}{2} H_{2} O$

Difference of Water = $2 - \frac{1}{2} = \frac{3}{2} = 1 \frac{1}{2}$

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