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 pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following statement is incorrect?

  1. In compounds components are present in definite proportion whereas in mixtures components are present in varying proportion

  2. Compounds are homogenous whereas mixtures are mostly heterogeneous

  3. Particles in a compound are generally of same kind whereas in mixtures they are of different kind

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

All the compounds are made up of different elements and have properties different from their constituent element.

Mixture composed of variant proportion of components.
Hence, all statements are correct.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following is a characteristic property of both mixtures and compounds?

  1. Their properties are same as those of their components

  2. Energy is released when they are formed

  3. Their masses are equal to the sum of the masses of their components

  4. They contain the components in fixed proportions
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mixture and a compound both follow the law of conservation of mass so their weight equals to the sum of mass of their components.

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Alcohols containing only up to ___________ carbon atoms are completely miscible with water.

  1. three

  2. four

  3. five

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

Hydroxyl group makes the alcohol molecule polar and these are used as protic solvents. Two opposing solubility trends in alcohols are the tendency of the polar OH to promote solubility in water and the tendency of the carbon chain to resist it. So, methanol, ethanol, propanol are miscible in water as the OH group overcomes the short carbon chain.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

The following is the characteristic property of a substance:

  1. density

  2. volume

  3. weight

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Density is a characteristic property because it does not change with the varying amount of the substance. No matter how big or small a piece of the substance you have, it will always be the same density because it is the same material.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Take 2 glasses $A $ and $B$ and put tap water in $A$ and salt water in $B$. Now add 1 egg in each. In which of the glass, an egg will sink?

  1. $A$
  2. $B$

  3. Both

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

Salt water is denser than fresh water. So, if we put egg in salt water the egg floats and if we put egg in tap water the egg will sink.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Which of the following substance is not transparent?

  1. Glass

  2. Pure Water

  3. Air

  4. Steel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transparent material:- Materials which allow light to completely pass through them without getting scattered are called Transparent material.

Example- a glass of water, clear metal-containing.
Steel does not allow to pass light through it hence is an opaque object.

Multiple choice chemistry water and air and their importance importance of oxygen is air present everywhere around us? air as a natural resource

Which of the following is incorrect regarding oxygen?

  1. Solid oxygen is blue.

  2. Oxygen gas is odorless.

  3. Oxygen is non-toxic.

  4. Liquid and solid oxygen are paramagnetic.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solid oxygen is a clear substance with a light sky-blue colour. Oxygen gas is a colourless gas without taste or odour. Oxygen toxicity is a condition that results from the harmful effects of breathing molecular oxygen $(O _2)$ at elevated partial pressures. This causes hyperoxia, an excess of oxygen in body tissues.

Something that is paramagnetic means that it is weakly attracted to the poles of a magnetic field but it itself does not retain any magnetic properties once it is beyond that magnetic field. Oxygen, no matter what its state, is paramagnetic.In solid and liquid oxygen, the magnetic effect is measurable but in a gas, the molecules of oxygen possess ample energy of motion to overcome the weak magnetic influence. 

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

The change of state of water from one form to another is :

  1. chemical change

  2. irreversible change

  3. reversible change

  4. state variation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The change of state in water is a physical change hence it is reversible. When water is heated it convert in vapours and when cooled till $0^o C$ it freezes to form ice. Water vapors on condensation converts into water.

Hence the option C is correct.
Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

Air is an example of homogeneous mixture.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample. 
If we consider some region of air, the gases, their volumes present in one part of the region equal to another one part of same region. We aren't able to divide different gases present in air. 
The statement is true.
Multiple choice physics forces in fluids hydrometer and lactometer comparing density - relative density principle of floatation and its applications

A cube of ice has a iron piece frozen unside at.
The cube floats an a beakerfilled with water, when the ice melts then the level of water is beaker 

  1. remains same

  2. level decreases

  3. level increases

  4. first increase ans decrese
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Archimedes' principle, the weight of the displaced water equals the weight of the ice and the iron. When the ice melts, the iron sinks and the water from the melted ice occupies a volume equal to its mass, resulting in no change in the total water level.