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 mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Substance that is able to get dissolved in solvent is said to be:

  1. solute

  2. insoluble

  3. solvent

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

Soluble substances are those that easily dissolve in a solvent, such as water, and include sugar, salt, alcohol and some dish-washing detergents. In chemistry, solubility of a substance is a quantitative term that refers to the amount of substance that can dissolve in a given volume of a solvent.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Of the following substance which is an element, a mixture and a compound? 
Sea water is the example of :

  1. element

  2. mixture

  3. compounds

  4. all of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. Seawater is a complex mixture of 96.5 percent water, 2.5 percent salts, and smaller amounts of other substances, including dissolved inorganic and organic materials, particulates, and a few atmospheric gases. 

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Which of the following is a homogeneous mixture?

  1. Milk

  2. Steel

  3. Smoke

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

A heterogeneous mixture is composed of components that are not uniform and have different properties. Milk, soil, smoke are the heterogeneous mixture. 


A homogeneous mixture is composed of components that are uniform with fixed composition and proportions e.g. steel is an alloy of iron and carbon with fixed ratios.

Hence, option $B$ is correct.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Some examples of matter and their groups are given in column P and Q respectively.

P Q
(a) Air (i) Molecule
(b) $O _2$ (ii) Mixture
(c) Copper sulphate (iii) Base
(d) Sodium hydroxide (iv) Salt

The correct option is :

  1. a - (ii), b - (iv), c - (i), d - {iii)

  2. a - (iv), b - (iii), c - (ii), d - (i)

  3. a - (i), b - (ii), c - (iii), d - (iv)

  4. a - (ii) , b - (i), c - (iv), d - (iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(a) Air is a mixture of several gases that are invisible and odorless. It consists of about 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide, and other gases.

(b) Oxygen (O) is a chemical element (atomic number 8). It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element and oxidizing agent that readily forms compounds with most elements. It exists as a $O _2$ molecule in the natural state.
(c) Copper(II) sulfate is a salt and an ionic compound because it is formed from a metal and a non-metal.
(d) Sodium hydroxide is a strong base.
Thus Option D is correct.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Identify the heterogeneous mixture among the following:


( Brass, common salt and sulphur, water and oil, aerated water, steel )

  1. Common salt and sulphur, Water and oil

  2. Brass, Aerated water, Steel

  3. Common salt and sulphur, Steel, Brass

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

A heterogeneous mixture has non-uniform composition. Common salt and sulphur are distinct solid phases, and water and oil do not mix, forming two distinct layers.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Which sample is a homogeneous mixture?

  1. Kl(aq)

  2. Fe(s)
  3. $CO _2$(g)
  4. $NH _3$(l)

  5. NaCl(s)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

${ CO } _{ 2 }$ and ${ NH } _{ 3 }$ are a compound as it is made up of different elements.${ Fe(s) } _{  }$ is a pure substance as it is made up of a single element.


$NaCl$ is also a pure substance.${ NH } _{ 3 }$ is a compound as it is made up of different elements.

$KI(aq)$ is a homogeneous mixture as its composition is uniform throughout the mixture.

Hence the correct option is A.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Which substances show variations in composition on a particulate and macroscopic level?

  1. A pure element.

  2. A simple compound.

  3. A homogeneous solution.

  4. A heterogeneous mixture.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A heterogeneous mixture show variations in composition on a particular and macro scope level. A heterogeneous mixture do not have uniform composition. it show variation at any level whether microscope or macroscopic.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Magnesium sulphate in water is a ______mixture.

  1. solid-solid

  2. homogeneous

  3. heterogeneous

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

Homogeneous mixture- it is a mixture of solids, liquids and gases that has the same proportions of its components in any sample,

Magnesium sulphate(Epsom salt) is also a homogeneous mixture.
The correct option is [B].

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

Which one of the following statement is incorrect?

  1. All elements are homogeneous

  2. Compound made up of a number of elements are heterogeneous

  3. A mixture is not always heterogeneous

  4. Air is a heterogeneous mixture
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Air is a mixture of gas in gas.

The mixture of gas in gas is always homogenous.
Thus, air is a homogenous mixture.