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 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$.

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

The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than the wooden handle.
The ring is heated . When the ring cools it _____ and tightly fits on the handle.

  1. contracts

  2. expands

  3. evaporates

  4. condenses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than the wooden handle.
The ring is heated and it becomes slightly larger in size (expands). The handle  fits into the ring. When the ring cools it contracts and tightly fits on the handle.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

What does the pop sound indicate when sodium reacts with cold water?

  1. Release of oxygen

  2. Release of carbon dioxide

  3. Both A and B

  4. Release of hydrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sodium metal is very reactive. It reacts vigorously with oxygen and water. A lot of heat is generated in this reaction. Hence, it is stored in kerosene. To test for the release of hydrogen gas, place a lighted splint over the reacting metal - if it "pops" then hydrogen is present.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

The reaction of sodium metal with cold water is

  1. Endothermic

  2. Exothermic

  3. Both a and b

  4. Neither a nor b
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Metals like sodium and potassium react violently with cold water. These reactions are exothermic. The reaction is so violent and exothermic that the hydrogen which is evolved immediately catches fire.

Multiple choice physics nature of the physical world and measurement vernier calliper and screw gauge least count of vernier calliper and screw gauge measurement of length

A liquid of low specific heat capacity is preferred as a thermometric liquid.

  1. True

  2. False

  3. Either

  4. Neither
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A liquid with low specific heat capacity requires less heat to change its temperature, making it more sensitive to small temperature changes in thermometry.