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 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 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.

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?

 An ice cube is floating on the surface of water. How will the water level be affected by melting of this ice cube?

  1. Water level will be raised

  2. Water level will go down

  3. Water level will remain the same

  4. Water level will first rise up then it will go down
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Archimedes' principle states that a floating object displaces its own weight in fluid. When ice melts, the mass of the resulting water is equal to the mass of the ice, so the volume of water produced is exactly equal to the volume of water displaced by the ice. Thus, the level remains 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?

lce pieces are floating in a beaker  $A$  containing water and also in a beaker  $B$  containing miscible liquid of specific gravity  $1.2 .$  When ice melts, the level of

  1. Water increases in $A$
  2. Water decreases in $A$
  3. Liquid in $B$ decreases
  4. Liquid in $B$ increases
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When ice melts in water, the level remains unchanged because the weight of the displaced water equals the weight of the ice. In a liquid with specific gravity > 1, the ice displaces a smaller volume of liquid than its own melted volume, so the level decreases.

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?

Statement I:- An ice ball is floating in water. Some stone pieces are embedded inside the ice. When ice will melt level of water will fall.
Statement I:- In floating condition,stone pieces will displace more liquid compared to the condition when they sink.

  1. Statement I is true,statement II is true and statement II is a correct explanation for statement I.

  2. Statement I is true,statement II is true and statement II is NOT the correct explanation for statement I.

  3. Statement I is true,Statement II is false.

  4. Statement I is false,Statement II is true.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When ice with embedded stones melts, the stones sink. While floating, the stones displace liquid equal to their weight (due to the ice). Once they sink, they only displace their own volume, which is less than the volume of liquid required to support their weight.

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 block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if water is heated? 

  1. Floats with some part above water

  2. Just floats

  3. Sinks

  4. Floats completely above water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sinks.
On heating, the density of water decreases. So, upthrust on block decreases and weight of block exceeds upthrust due to which it sinks.