Chemistry ยท 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

Water molecules can be compared to

  1. fire because it gets hot

  2. magnets because of how it is attracted to itself

  3. other wet things for fun

  4. other types of plasma because they are liquidy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water molecules exhibit strong cohesion due to hydrogen bonding, which causes them to be attracted to each other. This is similar to how magnets are attracted to one another.

Multiple choice

Molecules move faster in a liquid than a gas

  1. False

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

Molecules in a gas move much faster and have more kinetic energy than molecules in a liquid. In a liquid, intermolecular forces keep the molecules closer together, restricting their movement compared to a gas.

Multiple choice

Evaporation is when a solid starts to dissolve

  1. False

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

Evaporation is the process where a liquid turns into a gas (vapor) at the surface. Dissolving is a different process where a solute mixes into a solvent to form a solution.

Multiple choice

The word dissolve means

  1. when a solid mixes into a liquid

  2. when condensation forms

  3. what happens in "drip drop"

  4. how dense an object is
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dissolving is the process where a solute (usually a solid) is incorporated into a solvent (usually a liquid) to create a homogeneous mixture called a solution.

Multiple choice

Evaporation happens when a

  1. solid turns into plasma

  2. pond freezes in the winter

  3. liquid turns into a vapour (gas)

  4. when gas turns into a liquid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Evaporation is the phase transition of a substance from the liquid state to the gaseous state. It occurs at the surface of the liquid.

Multiple choice

"Drip Drop" is an example of how water

  1. doesn't spill

  2. is attracted to itself

  3. is not affected by gravity

  4. that water is only wet sometimes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water molecules are polar, meaning they are attracted to one another through hydrogen bonding. This property, known as cohesion, causes water to form droplets rather than spreading out flat.

Multiple choice

When an object cools down the molecules

  1. get farther apart from each other and go faster

  2. get closer together and go faster

  3. get farther apart and go slower

  4. get closer together and go slower
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As temperature decreases, the kinetic energy of molecules decreases, causing them to move more slowly. Consequently, they occupy less space and move closer together.

Multiple choice

"Sugar Pot" showed us

  1. that sometimes experiments don't work as planned

  2. that sugar does not dissolve

  3. that sugar can be dissolved into any liquid

  4. that sugar doesn't have surface tension
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Science experiments often serve to demonstrate that variables affect outcomes, and sometimes results do not align with initial expectations. This is a fundamental lesson in the scientific method.

Multiple choice

"Juicy" showed us

  1. that adding heat makes an object freeze

  2. that adding or removing heat can change the state of an object

  3. that heat doesn't affect objects

  4. that sugar does not freeze
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Adding heat increases molecular motion, which can cause a solid to melt into a liquid or a liquid to evaporate into a gas. Removing heat causes the reverse process.

Multiple choice

The melting point of an object is

  1. the temperature at which a substance changes from a solid to a liquid

  2. the temperature at which a substance changes from a liquid to a solid

  3. the temperature at which a substance changes from a gas to plasma

  4. the temperature at which a substance changes from a plasma to a solid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The melting point is defined as the specific temperature at which a substance transitions from a solid state to a liquid state.

Multiple choice

The 4 states of matter we have talked about in class are

  1. solid, liquid, gas, phases

  2. solid, semi-solid, liquid, gas

  3. solid, liquid, gas, plasma

  4. there are only three states of matter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The four fundamental states of matter commonly taught in science are solid, liquid, gas, and plasma.

Multiple choice

Addition of non-volatile solute in water results in:

  1. an increase in melting point of the liquid

  2. a decrease in the boiling point of the liquid.

  3. a decrease in the vapour pressure of the liquid

  4. no change in the boiling point of the liquid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Adding a non-volatile solute lowers the vapor pressure of the solvent because the solute particles occupy space at the surface, reducing the rate of evaporation.

Multiple choice

What state of matter is Petroleum?

  1. Solid

  2. Liquid

  3. Gas

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

Petroleum in its natural, unrefined state is a viscous liquid found in underground reservoirs. It is not a solid, gas, or plasma under standard extraction conditions.

Multiple choice

What is particulate matter?

  1. a mixture of solid and liquid particles in the air

  2. specific forms of matter

  3. an odorless gas

  4. only water suspended in the air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Particulate matter (PM) refers to a complex mixture of extremely small particles and liquid droplets suspended in the air, including dust, dirt, soot, and smoke.