Chemistry · Science General

States of Matter

2,682 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice

What happens to a lump of cotton wool when it is put in cold water?

  1. The lump of cotton wool expands.

  2. The lump of cotton wool shrinks.

  3. The lump of cotton wool disintegrates and dissolves in water.

  4. Both (1) and (3)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The lump of cotton wool shrinks. Air is present in the cotton wool. When it is dipped in water, air present in the cotton wool escapes and it shrinks.