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 materials around us and different types of houses materials around us matter and its states different states of matter

When water is cooled it contracts until it reaches ______ and then it starts expanding.

  1. ${37^0}C$
  2. ${40^0}C$
  3. ${0^0}C$
  4. ${4^0}C$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Though substances contract on cooling, water expand when cooled beyond ${4^0 C}$. This is known as anomalous behavior of water. The density of water is maximum at $4^0$$C$

Multiple choice chemistry materials around us and different types of houses materials around us matter and its states different states of matter

Which of the following cannot change, in a physical change?

  1. Volume

  2. Pressure

  3. Chemical composition

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

In a physical change the chemical composition of a substance does not change. 


For example conversion of water into steam where composition remain same i.e. $H _2O$.

Volume, pressure and temperature are the physical properties.

Multiple choice chemistry materials around us and different types of houses materials around us matter and its states different states of matter

Which of the following statements about water are correct?

  1. Water has a fixed mass

  2. Water can be compressed

  3. Water takes the shape of its container

  4. Water has a fixed volume
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
Explanation

Water is a liquid hence it will show all the properties of liquids, it can take the shape of container, it has fixed mass and volume and very less compressible.


Hence the correct options are A, C and D.

Multiple choice chemistry materials around us and different types of houses materials around us matter and its states different states of matter

Water is liquid at room temperature. Which of the following is the correct reason to justify it?

  1. In water, the inter molecular forces are strong enough to keep its particle bound with each other

  2. The melting point of water is below room temperature

  3. Its boiling point is above room temperature

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

The intermolecular force of attraction between the water molecules is strong enough to keep the molecules/particles bound to each other. The melting point of water is below room temperature as it is already present in the liquid state whereas, its boiling point is above room temperature, i.e; $100^oC$ and room temperature is $20^oC - 22^oC$

Multiple choice zoology pollution - a rising environmental problem sources of water pollution marine life water pollution

.......... of water on earth is pure water and .......... of water is consumed for industrial purpose.

  1. 10%, 2% of pure water

  2. 3%, 5-10% of pure water

  3. 5%, 3-5% of pure water

  4. 40%, 10% of pure water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

About 71% of the Earth's surface is covered by water. There is only 3% of water which is considered as pure or fresh water. This water is present in lakes and rivers. This pure water is used for various different activities. It is also known as potable water. About 5-10% of pure water is used for the industrial purposes.

Thus, the correct answer is option B. 

Multiple choice physics life cycle of stars evolution and end stages of stars the stars stars

What happens after a helium flash?

  1. The core quickly heats up and expands.

  2. The star breaks apart in a violent explosion.

  3. The core suddenly contracts.

  4. The core stops fusing helium.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low mass stars (between 0.8 solar masses ( M ) and 2.0 M ) during their red giant phase . This results in heating up the core and expansion of the core takes place as a result

Multiple choice physics life cycle of stars evolution and end stages of stars the stars stars

As the age of star increases

  1. Helium quantity increases

  2. Helium quantity decreases

  3. Helium quantity does not

    change

  4. Helium, Hydrogen both

    quantities increases
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As a star ages, it fuses hydrogen into helium in its core. Therefore, the proportion of helium increases over time as the hydrogen fuel is consumed.

Multiple choice transpiration major activities of living organisms biology

Water lost through transpiration is 

  1. Pure water

  2. Rich in organic solutes

  3. Rich in dissolved salts

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

Transpiration is the process of the evaporation of water molecule from the upper surface of the leaves.

The water eluted out is the water without any solute concentration, so the water is pure.
So, the correct answer is 'Pure water'.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

Which of the following is an electrolyte?

  1. $AgNO _3$ solution

  2. Alcohol

  3. Mercury

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

Electrolyte is a substance that dissociates into ions in a solution and acquires the capacity to conduct electricity. Electrolysis is the dissociation of an electrolyte into ions at the electrodes by the passage of electric current.
During the electrolysis of silver nitrate solution, silver gets deposited at the cathode, while the anode loses an equal amount of Ag. Hence, $Ag{ NO } _{ 3 }$ is an electrolyte.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

Choose the correct option which is a non-electrolyte liquid.

  1. Water

  2. Salt solution

  3. Glucose

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

Electrolytes are salts or molecules that ionize completely in solution. As a result, electrolyte solutions readily conduct electricity.
Nonelectrolytes are compounds that do not ionize at all in solution. As a result, solutions containing nonelectrolytes will not conduct electricity. Typically, non-electrolytes are primarily held together by covalent rather than ionic bonds. A common example of a nonelectrolyte is glucose

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

What kind of particles will be found in a liquid compound which is a non-electrolyte?

  1. Molecules

  2. Ionic

  3. Metallic

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Molecules will be found in a liquid compound which is a non-electrolyte. For example, glucose is a non electrolyte. It does not dissociates in aqueous solution. Hence, in aqueous glucose solution, we can find glucose molecules. Another example of non electrolyte is urea.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

An electrolyte is a substance which?

  1. Conducts electricity

  2. Decomposes on heating

  3. Is acidic in nature

  4. When dissolved in water, dissociates into ions
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. The dissolved electrolyte separates into cations and anions, which disperse uniformly through the solvent. Electrically, such a solution is neutral.