Chemistry · Science General

States of Matter

2,382 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 chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Suspension is a non-homogeneous mixture in which very fine particles of .................. are dispersed in .................

  1. solid/liquid, gas/solid

  2. gas, liquid

  3. solid, liquid/gas

  4. solid/liquid/gas, liquid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A suspension is a heterogeneous mixture in which very fine particles of a solid dispersed in any medium (liquid/gas). In any suspension, fine particles of the solid remain suspended in the medium.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Muddy pond water and smoke is an example of a:

  1. colloid

  2. suspension

  3. true solution

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A suspension is a heterogeneous mixture in which very fine particles (about 10-5m in size) of solid are dispersed in any medium (liquid or gas). In suspension, the solute particles are visible to the naked eye, and remain suspended throughout the bulk of the medium. The Tyndall effect is observed in this mixture.

Muddy pond water, smoke coming out of a chimney, chalk-water mixture, coarse lime particles in water are examples of suspension.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

A suspension of liquid droplets or fine solid particles in a gas is called :

  1. aerosol

  2. particulate

  3. both a and b

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

A suspension of liquid droplets or fine solid particles in a gas is called an aerosol or particulate. In the atmosphere these consist of fine dust and soot particles, sea salt, biogenic and volcanogenic sulfates, nitrates, and cloud droplets.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Which of the following is an example of suspension?

  1. Milk

  2. Water

  3. Sand in water

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A key characteristic of a suspension is that the solid particles will settle and separate over time if left alone. An example of a suspension is a mixture of water and sand. When mixed up, the sand will disperse throughout the water. If left alone, the sand will settle to the bottom.

Multiple choice chemistry composition of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Which of the following is intermediate between suspension and solution?

  1. Mixture

  2. Colloid

  3. Element

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

Colloidal solutions are heterogeneous mixture of two or more substances. They appear homogeneous. The size of colloids is between the size of particles of solution and suspension, i.e., between 1 nanometer to 1000 nanometer.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Compounds that lowers the surface tension between two liquids or a liquid and a solid are called surfactants.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Any molecule which helps in decreasing the surface tension that is the inter facial tension between the two surfaces of liquids or solid-liquid surface is known as surfactants. Some common examples are Soaps and Detergents.
hence the answer is true

Multiple choice chemistry changes around us can all changes be reversed? substances and objects classification of changes

 Heat gain makes ice to:

  1. freeze

  2. evaporate

  3. melt

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

When heat flows through the ice, the ice will melt. 

The liquid has more energy than the solid, mainly because the molecular bonds in the solid adjust to low-energy positions. So energy, when flowed in, will convert the solid to the liquid.
Freezing will happen if the there is heat loss to ice.
Evaporation will happen if the heat gain is very high that makes the ice to convert to water vapor.
The correct answer is option $ C$.