Building Materials
Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength

(i) and (ii)
(ii) and (iii)
(i) and (iv)
(iii) and (iv)

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Building Materials
In the method of condensation polymerization,

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

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