S block elements

  • 0_1546460880768_IMG_20190103_015712.jpg
    Ans=(1)..Pls explain what is efflorescence

  • @sri
    In chemistry, efflorescence (which means "to flower out" in French) is the migration of a salt to the surface of a porous material, where it forms a coating.

    The essential process involves the dissolving of an internally held salt in water, or occasionally in another solvent. The water, with the salt now held in solution, migrates to the surface, then evaporates, leaving a coating of the salt.

    Here is an image showing efflorescence in designing building

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