chemistry MCQs - 9th class Chapter 01 Mcqs

1

The branch of chemistry that deals with the analysis of different substances, often using sophisticated instruments, is called?

A

Organic Chemistry

B

Analytical Chemistry

C

Biochemistry

D

Physical Chemistry

2

Which branch of chemistry studies the synthesis and properties of compounds that do not contain carbon-hydrogen bonds?

A

Organic Chemistry

B

Geochemistry

C

Inorganic Chemistry

D

Polymer Chemistry

3

The study of chemical substances and vital processes occurring in living organisms falls under which branch?

A

Nuclear Chemistry

B

Medicinal Chemistry

C

Biochemistry

D

Environmental Chemistry

4

What is defined as a substance having mass and occupying space?

A

Energy

B

An element

C

A compound

D

Matter

5

Which state of matter has particles that are widely apart with very weak intermolecular forces?

A

Solid

B

Liquid

C

Gas

D

Plasma

6

Which state of matter is considered a partially ionized gas containing electrons, ions, and photons?

A

Solid

B

Liquid

C

Gas

D

Plasma

7

A state of matter with properties between those of conventional liquids and crystalline solids, used in display devices, is known as?

A

Supercritical fluid

B

Liquid crystal

C

Graphene

D

Bose-Einstein condensate

8

What is the simplest form of matter, which cannot be broken down by ordinary chemical reactions?

A

Compound

B

Mixture

C

Element

D

Solution

9

A pure substance made up of two or more different chemical elements combined in a fixed ratio is a?

A

Compound

B

Mixture

C

Element

D

Colloid

10

Which of these is an example of a homogeneous mixture?

A

A sample of rock

B

A solution of salt and water

C

Milk

D

Soil

11

The phenomenon where an element can exist in more than one structural form is called?

A

Isotropy

B

Allotropy

C

Isomerism

D

Homeopathy

12

Diamond, graphite, and Buckminsterfullerene are allotropic forms of which element?

A

Sulphur

B

Oxygen

C

Phosphorus

D

Carbon

13

Which allotrope of carbon consists of spheres made of atoms arranged in pentagons and hexagons?

A

Diamond

B

Graphite

C

Graphene

D

Buckminsterfullerene

14

A mixture in which solute particles do not dissolve and settle down if left undisturbed is called a?

A

True solution

B

Colloidal solution

C

Suspension

D

Saturated solution

15

In which type of mixture do the particles pass through filter paper but are not truly homogenized and do not settle down?

A

True solution

B

Colloidal solution

C

Suspension

D

Unsaturated solution

16

A solution that can dissolve more amount of a solute at a particular temperature is called?

A

Saturated

B

Supersaturated

C

Concentrated

D

Unsaturated

17

The amount of solute which can dissolve in 100g of a solvent at a particular temperature is known as its?

A

Concentration

B

Molarity

C

Solubility

D

Density

18

How does the solubility of most gases in water generally change with an increase in temperature?

A

It increases

B

It decreases

C

It remains the same

D

It increases then decreases

19

The study of molecules and ions recurring in space and interstellar space is called?

A

Geochemistry

B

Nuclear Chemistry

C

Astrochemistry

D

Medicinal Chemistry

20

Which branch of chemistry focuses on the properties, structure, and synthesis of large molecules made of repeating building blocks?

A

Inorganic Chemistry

B

Polymer Chemistry

C

Analytical Chemistry

D

Physical Chemistry

21

According to the text, which state of matter does not need a container to be stored?

A

Liquid

B

Gas

C

Plasma

D

Solid

22

Graphene is described as a?

A

Three-dimensional crystal

B

One-dimensional crystal

C

Two-dimensional crystal

D

A type of liquid

23

Which of the following is NOT a property of Buckminsterfullerene (C60)?

A

Soluble in organic solvents

B

Has a cage-like structure

C

Conducts electricity well

D

Is soft

24

A mixture where the concentration of its constituents is different in its different parts is called?

A

Homogeneous

B

Saturated

C

A true solution

D

Heterogeneous

25

What happens to the particles in a suspension when it is filtered?

A

They pass through the filter paper

B

They dissolve in the solvent

C

They cannot pass through the filter paper

D

They form a colloidal solution

26

Which of the following compounds sees its solubility in water decrease with an increase in temperature?

A

Potassium nitrate (KNO3)

B

Sodium chloride (NaCl)

C

Lithium carbonate (Li2CO3)

D

Silver nitrate (AgNO3)

27

The study of the rates of reaction and the optimization of reaction conditions on an industrial scale is part of?

A

Physical Chemistry

B

Organic Chemistry

C

Inorganic Chemistry

D

Analytical Chemistry

28

The study of chemical composition of the Earth, its sources, and minerals is called?

A

Astrochemistry

B

Environmental Chemistry

C

Geochemistry

D

Biochemistry

29

What are proteins, cellulose, and nucleic acids described as in the text?

A

Naturally occurring polymers

B

Synthetic polymers

C

Simple inorganic compounds

D

Allotropes of carbon

30

What is a distinguishing macroscopic property of gases?

A

High density

B

Incompressibility

C

High fluidity

D

Fixed shape

31

In solids, particles are described as being?

A

Widely apart and random

B

Closely attached but randomly arranged

C

Fixed at their positions where they can oscillate

D

Having very high kinetic energy

32

The design and synthesis of drugs beneficial for mankind is the focus of?

A

Medicinal Chemistry

B

Biochemistry

C

Polymer Chemistry

D

Nuclear Chemistry

33

Which of the following is an example of a colloidal solution?

A

Salt water

B

Chalk in water

C

Starch solution

D

Vinegar

34

What type of bonds form between elements when they react to form a compound?

A

Weak bonds

B

Physical bonds

C

No bonds

D

Chemical bonds

35

Which element was the first to be created artificially by scientists in a laboratory?

A

Technetium

B

Graphene

C

Fullerene

D

Promethium

36

The properties of a mixture are the sum of the properties of its?

A

Elements

B

Compounds

C

Components

D

Solvents

37

Which of the following is NOT an example of matter?

A

Air

B

Milk

C

Energy

D

Soil

38

What is the structure of graphite described as?

A

Giant macromolecular structure

B

A cage-like sphere

C

A single layer of atoms

D

A layered structure of hexagonal rings

39

Rhombic and monoclinic are two crystalline allotropic forms of which element?

A

Carbon

B

Sulphur

C

Oxygen

D

Phosphorus

40

The study of radioactivity and nuclear processes falls under?

A

Nuclear Chemistry

B

Astrochemistry

C

Physical Chemistry

D

Inorganic Chemistry

41

In a solution of sugar and water, what is the sugar referred to as?

A

Solvent

B

Solute

C

Mixture

D

Compound

42

Supercritical fluids show the properties of both?

A

Solids and liquids

B

Gases and solids

C

Liquids and gases

D

Plasma and gases

43

How are components of a mixture separated?

A

By chemical reactions

B

By physical methods

C

They cannot be separated

D

By nuclear fission

44

Which of these is an example of a compound?

A

Air

B

Water (H2O)

C

Sodium (Na)

D

Milk

45

What is the main difference between a true solution and a colloidal solution upon filtration?

A

Colloidal particles are retained, true solution particles pass through

B

Both are retained by the filter paper

C

Both pass through the filter paper

D

True solution particles are retained, colloidal particles pass through

46

What is the term for a solution that has dissolved the maximum amount of solute at a given temperature?

A

Unsaturated solution

B

Dilute solution

C

Saturated solution

D

Supersaturated solution

47

The study of the sources, reactions, and effects of chemical species in the air, soil, and water is?

A

Analytical Chemistry

B

Environmental Chemistry

C

Geochemistry

D

Biochemistry

48

Which is NOT a property of graphene mentioned in the text?

A

Tough

B

Flexible

C

Low resistance

D

Light material

49

Which state of matter is the most dense?

A

Gas

B

Liquid

C

Solid

D

Plasma

50

The properties of a compound are always ______ from the elements from which it is formed.

A

the same as

B

a sum of

C

different

D

similar to