Building Materials
Pick up correct statement from the following:

All listed here
Fibre boards are used for light weight standing members
Fibre boards are used for thermal and acoustic control
Fibre boards are obtained by impregnating a resin product on fibres

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Building Materials
In the method of condensation polymerization,

Low-molecular substances are removed from the high molecular substance
All of these
The reaction proceeds with an evolution of hydrogen chloride
The reaction proceeds with an evolution of ammonia

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Building Materials
Assertion A : Paints with white lead base are not recommended for painting of iron works.Reason R : Paints with white lead base do not check rusting of iron.Select your answer according to the coding system given below:

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

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