Free Printable ELEMENTS, COMPOUNDS & MIXTURES

Worksheets

ELEMENTS, COMPOUNDS & MIXTURES

Total questions: 25

Worksheet time: 13mins

Name

Class

Date

What is Pure Substance

Pure Substances are the substances that are made up of two or more substances in any proportion

Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure.

There are how many types of Pure Substances with names.

2 ( Elements & Compounds)

2 (Elements & Mixtures)

3 ( Elements, Compounds & Mixtures)

None of these

True / False

Impure substances composition is uniform throughout the bulk.

True

False

How many kind of elements are there.

2(Metals & Non-Metals only)

3 (Metals,Non-Metals & Metalloids)

4 (Metals, Non-Metals, Metalloids, Noble gases)

None of these

At Present how many elements are known to us.

113

119

111

118

Impure Substances retain the properties of their constituent substances

True

False

Which of the following are the examples of Non-Metals?

Hydrogen, Helium, Oxygen

Oxygen, Gold, Zinc

Helium, Neon, Argon

Hydrogen, Oxygen, Nitrogen

Which are the smallest units of an element

Atoms

Molecules

Radicals

None of these

Pure Substances are

(a)

10.

What is Compound?

A Compound is a pure substance that is formed by the chemical combination of 2 or more elements in a fixed ratio by mass

A Compound is a pure substance cannot be divided further into anything simpler than itself by any chemical or physical process.

11.

There are 2 types of mixtures

True

False

12.

True/False

Compound is an impure substance and mixture is a type of pure Substance

True

False

13.

Handpicking method is used for which type of separation

Separation of Solid-Solid Mixtures

Separation of Liquid-Liquid Mixtures

Separation of Solid Liquid Mixtures

All of These

14.

Crystallisation is used to separate which type of Mixtures

Separation of Solid-Liquid Mixtures

Separation of Solid-Solid Mixtures

Separation of Liquid-Liquid Mixtures

None of these

15.

Fractional Distillation is used to separate Liquid-Liquid Mixtures

True

False

16.

Which method of separation is used to separate Liquid-Gas

Boiling

Evaporation

Decantation

None of these

17.

By which process we can separate the mixture of Iron and Sulphur

Hand-Picking

Winnowing

Sublimation

None of these

18.

By which methods we can separate the mixture of Ammonium Chloride from Sand

Crystallization

Sublimation

Winnowing

None of these

19.

How many elements are natural known to us

20.

By what method we can separate Liquid-Liquid miscible mixtures

Fractional Distillation

By separating Funnel

Centrifugation

None of These

21.

What is the formula of Sodium Carbonate

$Na_2CO_3\cdot10H_2O$

$H_2O$

$NaHCO_3$

None of these

22.

What is the formula of Sodium Sulphate

Na_2SO_4

$C_6H_{12}O_6$

$CaSO_4\cdot\frac{1}{2}H_2O$

None of these

23.

Components of Mixtures can be separated by physical methods

True

False

24.

The clear liquid above the sediment is called supernatant liquid.

True

False

25.

The insoluble solid left on the filter paper is called residue.

True

False

Reset

ELEMENTS, COMPOUNDS & MIXTURES

Total questions: 25

Worksheet time: 13mins

Similar Resources on Wayground