Why CaSO4 is not used in the crystallisation test?(a) Costly compound(b) Low solubility in water(c) Increases time taken for test(d) Releases toxic fumesThe question was asked in exam.The origin of the question is Tests on Stones topic in division Materials for Construction of Basic Civil Engineering

Why CaSO4 is not used in the crystallisation test?(a) Costly compound(

1.	Why CaSO4 is not used in the crystallisation test?(a) Costly compound(b) Low solubility in water(c) Increases time taken for test(d) Releases toxic fumesThe question was asked in exam.The origin of the question is Tests on Stones topic in division Materials for Construction of Basic Civil Engineering
Answer» The CORRECT OPTION is (b) Low solubility in water Easiest explanation: CRYSTALLISATION of CASO4 in pores CAUSES decay of stones and the low solubility in water prevent the use of this compound in the test.

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