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 group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

Which of the following is incorrect?

  1. iodine is a solid

  2. chlorine is insoluble in water

  3. iodine is more reactive than bromine

  4. bromine is more reactive than chlorine
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
Explanation

Reactivity order:-
$F _2>Cl _2> Br _2>I _2$
Thus, chlorine is more reactive than bromine and bromine is more reactive than iodine.

Chlorine is soluble in water.

Multiple choice chemistry principles of metallurgy extraction of metal from concentrated ore basics of metallurgy extraction of metals from ore

Which phenomenon occurs during the following change?
Solid wax left out in the sun.

  1. Sublimation

  2. Melting

  3. Condensation

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

Melting (Change of solid into liquid) - The change of solid into liquid due to increase in temperature is known as melting. Ice, which is a solid melts, i.e. changes into water. 
Similarly, when solid wax gets heated it converts into liquid and this is melting process.

Multiple choice chemistry production of metals extraction of metal from concentrated ore basics of metallurgy extraction of metals from ore

During melting of ice, the temperature of the ice does not change until the ice melts. The heat is used up in :

  1. changing the state overcoming the forces of attraction

  2. changing the state without overcoming the forces of attraction

  3. releasing into atmosphere

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

The heat is used up in changing the state overcoming the forces of attraction.

Multiple choice commercial applications water and air and their importance natural resources and their types promotion of renewable resources protecting our environment

The inexhaustible resources are

  1. Air and light

  2. Sand

  3. Both A and B

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

The resources which are available in nature in an unlimited amount, known as inexhaustible resources. These resources can be replenished again and again for use. The light energy is inexhaustible resources which are obtained from the sun. The wind and light energy can be used for the generation of electricity. The sand is available in large amounts and is used for the production of glass. 

Thus, the correct answer is option C. 

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Teflon is a special plastic on which oil and water do not stick.

  1. True

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

Teflon is a synthetic polymer (polytetrafluoroethylene) that can be used to cover the surface of certain object and imparts nonstick properties to it. Teflon is used for Non Stick material because the monomer units are hydrophobic in nature (tetrafluoroethylene) and thus oil and water do not stick to it.
option A is correct.

Multiple choice physics upthrust in fluids, archimedes' principle and floatation applications of floatation principle of floatation and its applications when do objects float on water?

If a piece of ice floating on the surface of water in a beaker melts completely, the level of water

  1. Rises

  2. Remains the same

  3. Falls

  4. Initially rises and then falls
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When a piece of ice is placed in a beaker containing water, some of its portion remains out of the water level. Since the volume of ice is greater than the water hence after melting the volume of the piece will decrease and the water level will remain the same.

Multiple choice physics upthrust in fluids, archimedes' principle and floatation applications of floatation principle of floatation and its applications when do objects float on water?

A piece of ice is floating in a jar containing water. When ice melts, the temperature of water falls from $4^0C$ to $1^0C$. The level of water :

  1. rises

  2. falls

  3. remains unchanged

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

Remains unchanged because there is no change in mass.

The correct option is C.