Which one of the following statements is not right?

Question

Admin · Accepted Answer

Barium and strontium are found free in nature

Admin · Answer

All alkaline earth metals form hydrated salts

Admin · Answer

The presence of NaCl increases the rate of setting of Plaster of Paris

Admin · Answer

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

Q. Which one of the following statements is not right?