Is Matter Around Us Pure

This is an MCQ-based quiz on Is Matter Around Us Pure.

This includes Homogeneous mixture, Centrifugation, Adsorption, Distillation, and Crystallization.

Start Quiz

Tincture of iodine has antiseptic properties. This solution is made by dissolving

iodine in potassium iodide iodine in vaseline iodine in water iodine in alcohol

Which of the following are homogeneous in nature? (i) ice (ii) wood (iii) soil (iv) air

(i) and (iii) (ii) and (iv) (i) and (iv) (iii) and (iv)

Which of the following statements are true for pure substances? (i) Pure substances contain only one kind of particles (ii) Pure substances may be compound or mixtures (iii) Pure substances have the same composition throughout (iv) Pure substances can be exemplified by all elements other than nickel

(i) and (ii) (i) and (iii) (iii) and (iv) (ii) and (iii)

Rusting of an article made up of iron is called

Corrosion and it is a physical as well as chemical change

Dissolution and it is a physical change

Corrosion and it is a chemical change

Dissolution and it is a chemical change

What is the name of the metal which exists in liquid state at room temperature?

Sodium Potassium Mercury Bromine

When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in:

Centrifugation Fractional distillation Evaporation Tunneling

Which of the following elements is not a metalloid?

Boron Silicon Germanium Tungsten

If we put camphor in an open container, its amount keeps on decreasing due to the phenomenon of

Evaporation Precipitation Condensation Sublimation

Heterogeneous mixture in which the solute particles do not dissolve and remain suspended throughout the solvent and the solute particles can be seen with the naked eye is known as:

Colloidal solution Super saturated solution Sublimation Suspensions

Who was the first scientist to use the term ‘element’ in 1661?

Robert Boyle Charles Antonnie Lorent None of them

Which of the following will show the “Tyndall effect”?

Salt solution Milk and starch solution Copper sulphate solution None of them

The size of colloidal particles are:

10^-4 – 10^-8 m 10^-10 – 10^-12 m 10^-2 – 10^-4 m 10^-10 – 10^-8 m

Boron, Silicon, Germanium, etc., are:

Metals

Non-metals

Metalloids

None of them

The major component of a solution is called:

Solute

Insoluble

Solvent

Solution

Mercury and bromine are both

liquid at room temperature solid at room temperature gases at room temperature both (a) and (b)

Which of the following methods would you use to separate cream from milk?

Fractional distillation Distillation Centrifugation Filtration

Cooking of food and digestion of food:

Are both physical processes

Are both chemical processes

Cooking is physical whereas digestion is chemical

Cooking is chemical whereas digestion is physical

A mixture of sulphur and carbon disulphide is

Heterogeneous and shows Tyndall effect

Homogeneous and shows Tyndall effect

Heterogeneous and does not show Tyndall effect

Homogeneous and does not show Tyndall effect

Two chemical species X and Y combine together to form a product P which contains both X and YX + Y → PX and Y cannot be broken down into simpler substances by simple chemical reactions.

Which of the following concerning the species X, Y and P are correct?

(i) P is a compound(ii) X and Y are compounds(iii) X and Y are elements(iv) P has a fixed composition

(i), (ii) and (iii)

(i), (ii) and (iv)

(ii), (iii) and (iv)

(i), (iii) and (iv)

Two substances, A and B were made to react to reaction a third substance, A2B according to the following2 A + B → A2BWhich of the following statements concerning this reaction are incorrect?

(i) The product A2B shows the properties of substances A and B

(ii) The product will always have a fixed composition

(iii) The product so formed cannot be classified as a compound

(iv) The product so formed is an element

(i), (ii) and (iii)

(ii), (iii) and (iv)

(i), (iii) and (iv)

(ii), (iii) and (iv)

Quiz/Test Summary

Title: Is Matter Around Us Pure

Questions: 20

Contributed by: