Q. “Hot mixing method” was seen in the news recently, is associated with –

[A] Organic farming

[B] Treatment of contaminated water

[C] Durable construction

[D] Capturing carbon dioxide

Answer: C
Notes:

Explanation – During the hot mixing process, the lime clasts created a brittle structure with a reactive calcium source. The calcium would travel through the lime clasts, react with water and quickly fill any cracks.  This method was used by Romans in construction of their buildings.

Source: ForumIAS