Which one of the following statements is not correct? Options: A . &nbspThe presence of NaCI increases the rate of setting of plaster of Paris B . &nbspGypsum is added to the cement to slow down its rate of setting C . &nbspAll alkaline earth metals form hydrated salts D . &nbspBarium and strontium are found free in nature

Which one of the following statements is not correct?

Question

Which one of the following statements is not correct?

Options:

A . The presence of NaCI increases the rate of setting of plaster of Paris

B . Gypsum is added to the cement to slow down its rate of setting

C . All alkaline earth metals form hydrated salts

D . Barium and strontium are found free in nature

Answer: Option D
:
D
Option:(d)

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