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UPSC Civil Service Exam Questions

Q1: What is efflorescence ?

A Formation of white patches on the brick surface due to insoluble salts in the brick clay

B Swelling of brick due to presence of carbonaceous matter and gas

C Deformation of brick due to exposure to rain

D Impurities in the brick clay which show after burning

ANS:A - Formation of white patches on the brick surface due to insoluble salts in the brick clay

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