Building Materials
In the method of condensation polymerization,

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

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Building Materials
Pick up correct statement from the following:

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

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