When a brick is immersed in water for 24 hours and then dried, if

Question

Options:

A . No grey or white deposits appear on the surface, the brick is free from soluble salts

B . 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence

C . 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence

D . All the above

Answer: Option D

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