Building Materials
Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as

Quick setting cement
White cement
Low heat Portland cement
Rapid hardening cement

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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:

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

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