Fundamentals of Chemistry:

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Chemistry Ch#01, 9th Class

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1 / 50

Formula mass of K₂SO₄ is___________

110amu

145amu

180amu

174amu

2 / 50

1-gram formula of NaCl contains grams________

100g

32g

49g

58.5g

3 / 50

Valency of oxygen is___________

3

4

2

5

4 / 50

Which one is a physical property?

All of these

Smell

Taste

Hardness

5 / 50

A piece of matter in pure form is termed as _________

Element

Matter

Mixture

Substance

6 / 50

Empirical formula of glucose is______

CHO

C2 HO

C H2 O

CHO2

7 / 50

How many molecules of water will be present in half mole of water?

6.02x10(24)

6.02x10(23)

1.66x10(-24)

3.01x10(23)

8 / 50

Which one is polyatomic molecule?

C H4

C6 H2 O6

All of these

H2 SO4

9 / 50

The ratio of carbon and oxygen in CO₂ ________

2:3

1:8

3:8

1:2

10 / 50

The most abundant element occurring in the oceans is_______

Oxygen

Nitrogen

Silicon

Hydrogen

11 / 50

Which of the followings are tri-atomic molecule except?

CO2

O3

H2

H2O

12 / 50

How many atoms are present in one-gram atomic mass of a substance?

6.2 x 10(-23)

6.02 x 10(23)

12.04 x 10(23)

6.20 x 10(24)

13 / 50

Which type of molecular ions are present in plasma?

Anionic

Cationic

Neutral

Both a & b

14 / 50

Example of heterogeneous mixture is ___________

Air

Soil

ice cream

gasoline

15 / 50

Mixture can be separated by method_________

Nuclear

All of these

Physical

Chemical

16 / 50

Brass is a mixture of___________

Cu & Al

Al & Fe

Cu & Zn

Cu & Sn

17 / 50

Formation of which of the following is affected by light_________

Ion

Free Radical

Molecule

Atom

18 / 50

1-gram atom of carbon contains how many moles is_________

2mole

12mole

1mole

6 moles

19 / 50

Which one of the following can be separated by physical-means?

Element

Mixture

Compound

Radical

20 / 50

80 percent elements are____________

Metalloids

None

Non-metals

Metals

21 / 50

Which one is extremely reactive species?

CH3

H2

N2+

Na

22 / 50

Industrial chemistry deals with the Manufacturing of compounds_________

on economic scale

in the laboratory

on commercial scale

on micro scale

23 / 50

Empirical formula of acetic acid (CH₃COOH) is _________

None of these

C H2 O

CH

CHO

24 / 50

Which one of following is an example of ionic compound?

H2O

CH4

NaCl

HCl

25 / 50

The molar mass of H₂S0₄ is__________

98amu

98g

9.8amu

9.8g

26 / 50

Valency of carbon is___________

4

2

1

3

27 / 50

Nuclear Chemistry has application in__________

Ecology

Medical Treatment

Metallurgy

Agriculture

28 / 50

Example of mono atomic molecule is___________

H2

CO2

O2

He

29 / 50

Number of protons in the nucleus of an atom is called ________

Atomic No

Electron No

Mass Unit

Mass No

30 / 50

Atom is electrically______

Negative

Positive

Neutral

None

31 / 50

Empirical formula of sand is________

SiO4

SiO3

SiO2

Si2O3

32 / 50

Elements may be_________

Liquid

Solid

Gas

All of these

33 / 50

Which one of the following pairs has the same mass?

1 mole of O2 and 1 mole of N2

1 mole of CO and 1 mole of N2

1 mole of O2 and 1 mole of CO2

1 mole of CO and 1 mole of CO2

34 / 50

Percentage of Argon in nature is____________

87%

0.9%

47%

21%

35 / 50

Fourth state of matter is__________

Solid

Liquid

Plasma

Gas

36 / 50

The valency of Noble Gases is__________

Two

One

Three

Zero

37 / 50

The mass of one molecule of water is________

18kg

18amu

18g

18mg

38 / 50

40g of H₃PO₄ contains number of moles__________

4.8g

0.58g

5.8g

0.408g

39 / 50

In which one of the following pairs has the same number of ions?

1/3 mole of NaCl and 1/2 mole of MgCl2

1/2 mole of NaCl and 1/2 mole of MgCl2

1/2 mole of NaCl and 1/3 mole of MgCl2

1 mole of NaCl and 1 mole of MgCl2

40 / 50

Example of covalent compound is _________

HCl

KNO3

NaCl

KCl

41 / 50

The third abundant gas found in the earth's crust is_______

Nitrogen

Oxygen

Carbon monoxide

Argon

42 / 50

Which one of the following elements is found in most abundance in the earth's crust?

Oxygen

Aluminum

Silicon

Iron

43 / 50

Which one of the following is molar mass of O₂ in amu?

32amu

192.64X10(-25)amu

53.12x10(-24)amu

1.92x10(-25)amu

44 / 50

Which compound has same molecular and empirical formula?

C6 H12 O6

H2 O2

H2 O

C6 H6

45 / 50

How many number of moles are equivalent to 8 grams of CO₂?

0.18

0.15

0.21

0.24

46 / 50

Value of Avogadro number is________

6.00x10(24)

6.02x10(23)

6.6x10(-20)

1.32x10(23)

47 / 50

Structure of atom is studied in which branch of chemistry?

Organic

Nuclear

Physical

Inorganic

48 / 50

One amu (atomic mass unit) is equivalent to_______

1.66 x 10(-24)kg

1.66 x 10(-24) mg

1.66 x 10(-23)g

1.66.x10(-24)g

49 / 50

How many atoms are present in one-gram atomic mass of a substance?

6.02x10(23)

1.66x10(-23)

6.02x10(24)

None of these

50 / 50

Mass of 3 moles of oxygen atoms is ___________

32g

16g

48g

64g

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Chemistry Notes, Problems for Class 9th

Chemistry, a new subject for 9th Class, having a lot of concepts, starting from a single definition of the smallest particle of our universe which is called ‘atom’. In the 8th grade usually, we have to study only one book of science that combines chemistry, physics, and biology. But as, we got into 9th class and with every passing day things starts to get more complex now. similarly we got three books instead of just one science book, chemistry class 9 chapter 1.

And, if you any student of 9th Class feeling difficult to understand the concept of chemistry. Then, these chemistry notes for class 9 are enough. by Understanding chemistry Notes for 9th class means remembering a lot of concepts. Consider that particular subject important in which you want to study for your whole life. And, read more than just the textbook about that particular subject. If you think you want to study chemistry for your whole life that’s great, our country also need chemists.

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Chapter wise PDF Notes / Problems / Solution of Chemistry 9th Class

                     Chapter-01 – Fundamentals of Chemistry

                     Chapter-02 – Structure of Atoms 

                     Chapter-03 – Periodic Table and Periodicity of Properties

                     Chapter-04 – Structure of Molecules 

                     Chapter-05 – Physical States of Matter 

                     Chapter-06 – Solutions 

                     Chapter-07 – Electrochemistry 

                     Chapter-08 – Chemical Reactivity 

                     Pairing Scheme for 2021 – Chemistry 9th Class