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

Milk is a natural

  1. Solution

  2. Emulsion

  3. Mixture

  4. Suspension
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Milk is an emulsion - a colloid where liquid fat droplets are dispersed in water-based fluid. Casein proteins act as natural emulsifiers, keeping fat from separating. It's not a solution (homogeneous mixture), simple mixture (components don't settle), or suspension (particles would settle over time). Emulsions are specifically liquid-in-liquid colloidal dispersions.

Multiple choice

Viscosity of blood is

  1. five times more than that of water

  2. ten times more than that of water

  3. exactly equal to that of water

  4. two times less than that of water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood viscosity is approximately 3-5 times that of water due to the presence of cells, proteins, and other suspended components. The higher viscosity is essential for proper circulatory function and maintaining blood pressure.

Multiple choice

Condensation changes water vapour into

  1. liquid form

  2. solid form

  3. gaseous or liquid

  4. solid or liquid form
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Condensation is the process where water vapor cools and changes state. Depending on temperature conditions, it becomes liquid water (dew, clouds, rain) or solid ice/snow/frost. Both outcomes are condensation - the key is cooling from gas to denser state.

Multiple choice

Chemically, dry ice is

  1. Solid carbon dioxide

  2. Solid sulphur dioxide

  3. Ice formed from pure distilled water

  4. Ice kept at sub-zero temperatures
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dry ice is the solid form of carbon dioxide (CO₂). It sublimates directly from solid to gas at -78.5°C at atmospheric pressure, which is why it's called 'dry' - it doesn't melt into liquid first. The term distinguishes it from regular water ice. Sulphur dioxide and other substances are not dry ice.

Multiple choice

Directions: In the following question, find out the alternative which will replace the blank.

Melt: Liquid :: Freeze: _________

  1. Cold

  2. Ice

  3. Solid

  4. Air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The analogy shows state changes: melting converts solid to liquid, so the analogous operation should convert liquid back to solid. Freezing does exactly this - it's the reverse process of melting. 'Cold' is the cause, not the result. 'Ice' is a specific substance, not the general state. 'Air' is unrelated to state change.