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Chemistry Notes for Class-9 Chapter-4

Structure of Molecule 

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Chemistry Ch#04, 9th Class

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1 / 89

The melting point of NaCl is___________

2 / 89

Which force becomes operative, when two atoms come closer to each other?

3 / 89

Which of the following is the weakest force among the atoms?

4 / 89

Ice floats on water because____________

5 / 89

The electronegative elements have_________

6 / 89

Epoxy adhesives are________

7 / 89

Triple covalent bond involves how many numbers of electrons?

8 / 89

The mobile electrons are responsible for holding the atoms of metals together, forming a ____

9 / 89

The force of attractive between water molecules is__________

10 / 89

How many electrons are involved in the formation single covalent bond?

11 / 89

Ionic compounds have________

12 / 89

How many lone pairs are present on nitrogen in ammonia molecule?

13 / 89

Which of the following is a building block of matter?

14 / 89

The formation of ionic bond between two ions is due to ________

15 / 89

The boiling point of NaCl is __________

16 / 89

Hydrogen and helium follow ________

17 / 89

At room temperature, higher molecular mass covalent compounds are ________

18 / 89

A covalent bond formed by two similar atoms is known as________

19 / 89

Epoxy adhesives can be made________

20 / 89

The boiling point of water is ____________

21 / 89

Which type of bond is present between NH3 and BF3?

22 / 89

The electrons that pair up to form a chemical bond are called__________

23 / 89

The forces responsible for binding the atoms together in a molecule are called_______

24 / 89

Which of the following is an example of covalent compound?

25 / 89

During the formation of ionic bond, heat____________

26 / 89

A covalent bond formed by the mutual sharing of two pairs of electrons between bonded atom is called__________

27 / 89

Identify the compound which is not soluble in water__________

28 / 89

Considering the electronic configuration of atoms which atom with the given atomic number will be the most stable one?

29 / 89

Every atom has a natural tendency to achieve electrons in its valence shell________

30 / 89

A bond formed by the mutual sharing of an electron pair is called________

31 / 89

A bond formed due to complete transfer of electrons from one atom to another is called_____

32 / 89

The compounds formed by oppositely charges are known as _________

33 / 89

All the noble gases have their valence electrons_________

34 / 89

Which of the following is an example of polar covalent compound?

35 / 89

A bond formed between two non-metals is expected to be_________

36 / 89

The energy required to break the intermolecular forces between one mole of liquid hydrogen chloride molecule to convert it into gas is___________

37 / 89

Which pair of the molecules has same type of covalent bonds?

38 / 89

The electro-negative value of fluorine is____________

39 / 89

Covalent bond is most commonly found between the elements of group_________

40 / 89

Nitrogen molecule contain_________

41 / 89

A bond pair in covalent molecules usually has_________

42 / 89

The boiling point of alcohol is ____________

43 / 89

Atoms react with each other because_________

44 / 89

An atom having six electrons in its valence shell will achieve noble gas electronic configuration by_____________

45 / 89

Which group of the periodic table have the tendency to gain electrons _______

46 / 89

The density of ice at 0°C is __________

47 / 89

If the difference of electronegativities between two elements is less than 1.7, the bond will be______

48 / 89

Which sign indicates partial positive and partial negative charge?

49 / 89

Metals have the tendency to lose electrons due to ________

50 / 89

Epoxy adhesives are also known as_________

51 / 89

Hydrogen bonding is always found in____________

52 / 89

In metals, the hold of nucleus over the valence shell electrons is weak due to _______

53 / 89

If the difference of electro-negativities between two elements is more than 1.7, the bond will be__________

54 / 89

The electropositive elements have tendency to _________

55 / 89

Octet rule is __________

56 / 89

Identify which pair has polar covalent bonds________

57 / 89

The density of water at 0°C  is_________

58 / 89

How many valence shell electrons are there in group-01 elements?

59 / 89

Which of the following is the weakest bond amongst them?

60 / 89

Water has high boiling points as compared to alcohol due to _______

61 / 89

The electronic configuration of sodium atom is ____________

62 / 89

How many electrons are there in the valence shell of sodium atom?

63 / 89

Covalent bond involves the _______

64 / 89

The formation of a chemical bond is a result of dominant net______

65 / 89

Dative covalent bond is also known as________

66 / 89

The difference between electronegativities of hydrogen and chlorine________

67 / 89

Non-polar compounds are insoluble in_________

68 / 89

Which of the following do not show ions in water?

69 / 89

Noble gases are non-reactive because they do not__________

70 / 89

Malleability is the property by virtue of which a metal can be drawn into________

71 / 89

Transfer of electrons between elements result in________

72 / 89

Attaining two electrons in the valence shell is called__________

73 / 89

Which molecule contains a single covalent bond?

74 / 89

Atom achieve stability by attaining electronic configuration of _________

75 / 89

The nature of a chemical bond can be predicted by using__________

76 / 89

The position of an atom in the periodic table indicates its__________

77 / 89

The electro-negativity value of atoms is given by which scale?

78 / 89

Intermolecular forces are collectively known as__________

79 / 89

Which of the following is an electron deficient molecule?

80 / 89

A molecule is formed, when energy of a system___________

81 / 89

Which type of attractive forces are present in ionic compounds?

82 / 89

Metals are good conductors of heat and electricity in solid and liquid state due to________

83 / 89

Which type of adhesives is less expensive to produce?

84 / 89

The valence electrons, which are involved in chemical bonding, are termed as_________

85 / 89

How many covalent bonds does C2H2 molecule have?

86 / 89

Metals usually have ______________

87 / 89

How many valency shell electrons are there in Na+ ion?

88 / 89

Mode of reaction depends upon its_________

89 / 89

When an electro-negative element combines with electro-positive element the type of bonding is_______

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Chemistry Notes, Problems for Class 9th

Chemistry, a new subject for 9th Class, having a lot of concepts all 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 Notes for Class-9 Chapter-4.

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, we need chemists. Chemistry Notes for Class-9 Chapter-4.

Chemistry class 9 pdf / Chemistry Notes for Class-9 Chapter-4

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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




One thought on “Chemistry Notes for Class-9 Chapter-4”
  1. uchino shit suji says:

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