Building Materials
In order of increasing percentage of silica, the correct sequence is

Pure clay, sandy clay, calcareous clay
None of these
Sandy clay, calcareous clay, pure clay
Calcareous clay, pure clay, sandy clay

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Building Materials
Assertion A : Pure lime takes a long time to develop adequate strength.Reason R : Pure lime has slow hardening characteristics.Select your answer according to the coding system given below:

Both A and R is true and R is correct explanation of A
A is false but R is true
Both A and R is true and R is not a correct explanation of A
A is true but R is false

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