Multiple choice

Gel acting as a thermal insulator is

  1. hydrogel

  2. organogel

  3. xerogel

  4. aerogel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aerogel is a manufactured material with the lowest bulk density of any known porous solid. It is derived from a gel in which the liquid component of the gel has been replaced with a gas. The result is an extremely low-density solid, with a notable effectiveness as a thermal insulator.

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