Fundamentals of Chemistry:

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Chemistry Ch#01, 9th Class

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1 / 50

Empirical formula of glucose is______

CHO

C H2 O

CHO2

C2 HO

2 / 50

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

Argon

Nitrogen

Carbon monoxide

Oxygen

3 / 50

Which compound has same molecular and empirical formula?

C6 H6

C6 H12 O6

H2 O2

H2 O

4 / 50

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

0.18

0.24

0.15

0.21

5 / 50

Example of covalent compound is _________

KNO3

HCl

KCl

NaCl

6 / 50

Example of mono atomic molecule is___________

He

CO2

H2

O2

7 / 50

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

Atomic No

Electron No

Mass No

Mass Unit

8 / 50

Fourth state of matter is__________

Gas

Liquid

Plasma

Solid

9 / 50

Which one is a physical property?

Taste

Hardness

Smell

All of these

10 / 50

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

3.01x10(23)

1.66x10(-24)

6.02x10(23)

6.02x10(24)

11 / 50

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

Radical

Mixture

Compound

Element

12 / 50

Example of heterogeneous mixture is ___________

Air

gasoline

Soil

ice cream

13 / 50

1-gram atom of carbon contains how many moles is_________

6 moles

1mole

12mole

2mole

14 / 50

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

6.20 x 10(24)

12.04 x 10(23)

6.02 x 10(23)

6.2 x 10(-23)

15 / 50

80 percent elements are____________

Non-metals

Metalloids

Metals

None

16 / 50

Brass is a mixture of___________

Al & Fe

Cu & Sn

Cu & Zn

Cu & Al

17 / 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 mole of NaCl and 1 mole of MgCl2

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

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

18 / 50

Valency of oxygen is___________

2

5

3

4

19 / 50

Percentage of Argon in nature is____________

87%

47%

0.9%

21%

20 / 50

Mass of 3 moles of oxygen atoms is ___________

16g

48g

32g

64g

21 / 50

Mixture can be separated by method_________

Physical

Nuclear

Chemical

All of these

22 / 50

Formation of which of the following is affected by light_________

Ion

Atom

Free Radical

Molecule

23 / 50

Value of Avogadro number is________

1.32x10(23)

6.6x10(-20)

6.00x10(24)

6.02x10(23)

24 / 50

Empirical formula of acetic acid (CH₃COOH) is _________

CHO

C H2 O

None of these

CH

25 / 50

Atom is electrically______

None

Positive

Negative

Neutral

26 / 50

Industrial chemistry deals with the Manufacturing of compounds_________

on commercial scale

on micro scale

in the laboratory

on economic scale

27 / 50

One amu (atomic mass unit) is equivalent to_______

1.66.x10(-24)g

1.66 x 10(-23)g

1.66 x 10(-24) mg

1.66 x 10(-24)kg

28 / 50

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

None of these

6.02x10(24)

6.02x10(23)

1.66x10(-23)

29 / 50

The ratio of carbon and oxygen in CO₂ ________

1:8

2:3

3:8

1:2

30 / 50

Formula mass of K₂SO₄ is___________

174amu

145amu

110amu

180amu

31 / 50

Valency of carbon is___________

2

1

4

3

32 / 50

1-gram formula of NaCl contains grams________

100g

32g

49g

58.5g

33 / 50

The valency of Noble Gases is__________

Two

Zero

Three

One

34 / 50

Which of the followings are tri-atomic molecule except?

H2

O3

H2O

CO2

35 / 50

40g of H₃PO₄ contains number of moles__________

4.8g

0.408g

0.58g

5.8g

36 / 50

A piece of matter in pure form is termed as _________

Substance

Matter

Element

Mixture

37 / 50

Which one of the following pairs has the same mass?

1 mole of CO and 1 mole of CO2

1 mole of O2 and 1 mole of CO2

1 mole of CO and 1 mole of N2

1 mole of O2 and 1 mole of N2

38 / 50

Which type of molecular ions are present in plasma?

Neutral

Anionic

Both a & b

Cationic

39 / 50

The molar mass of H₂S0₄ is__________

98amu

9.8g

98g

9.8amu

40 / 50

Elements may be_________

All of these

Liquid

Gas

Solid

41 / 50

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

Oxygen

Aluminum

Iron

Silicon

42 / 50

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

53.12x10(-24)amu

192.64X10(-25)amu

1.92x10(-25)amu

32amu

43 / 50

Nuclear Chemistry has application in__________

Medical Treatment

Agriculture

Ecology

Metallurgy

44 / 50

Structure of atom is studied in which branch of chemistry?

Physical

Organic

Nuclear

Inorganic

45 / 50

Which one of following is an example of ionic compound?

CH4

HCl

H2O

NaCl

46 / 50

Empirical formula of sand is________

Si2O3

SiO4

SiO3

SiO2

47 / 50

The mass of one molecule of water is________

18amu

18mg

18kg

18g

48 / 50

Which one is polyatomic molecule?

All of these

C6 H2 O6

C H4

H2 SO4

49 / 50

Which one is extremely reactive species?

Na

H2

N2+

CH3

50 / 50

The most abundant element occurring in the oceans is_______

Silicon

Nitrogen

Hydrogen

Oxygen

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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