9th class chemistry solved exercises chapter 4

Chemistry Notes for Class-9 Chapter-4

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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

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

2 / 89

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

3 / 89

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

4 / 89

Nitrogen molecule contain_________

5 / 89

Metals have the tendency to lose electrons due to ________

6 / 89

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

7 / 89

A molecule is formed, when energy of a system___________

8 / 89

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

9 / 89

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

10 / 89

Covalent bond involves the _______

11 / 89

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

12 / 89

Which of the following do not show ions in water?

13 / 89

Epoxy adhesives can be made________

14 / 89

Hydrogen and helium follow ________

15 / 89

Attaining two electrons in the valence shell is called__________

16 / 89

The compounds formed by oppositely charges are known as _________

17 / 89

The density of water at 0°C  is_________

18 / 89

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

19 / 89

Atoms react with each other because_________

20 / 89

Identify which pair has polar covalent bonds________

21 / 89

Which type of attractive forces are present in ionic compounds?

22 / 89

Dative covalent bond is also known as________

23 / 89

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

24 / 89

Which of the following is an example of covalent compound?

25 / 89

How many covalent bonds does C2H2 molecule have?

26 / 89

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

27 / 89

A covalent bond formed by two similar atoms is known as________

28 / 89

Identify the compound which is not soluble in water__________

29 / 89

The density of ice at 0°C is __________

30 / 89

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

31 / 89

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

32 / 89

The difference between electronegativities of hydrogen and chlorine________

33 / 89

The melting point of NaCl is___________

34 / 89

The boiling point of water is ____________

35 / 89

The electronegative elements have_________

36 / 89

Triple covalent bond involves how many numbers of electrons?

37 / 89

Which type of adhesives is less expensive to produce?

38 / 89

Ionic compounds have________

39 / 89

Mode of reaction depends upon its_________

40 / 89

Transfer of electrons between elements result in________

41 / 89

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

42 / 89

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

43 / 89

Which of the following is the weakest bond amongst them?

44 / 89

Covalent bond is most commonly found between the elements of group_________

45 / 89

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

46 / 89

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

47 / 89

Which molecule contains a single covalent bond?

48 / 89

The boiling point of alcohol is ____________

49 / 89

All the noble gases have their valence electrons_________

50 / 89

Ice floats on water because____________

51 / 89

Epoxy adhesives are also known as_________

52 / 89

Which type of bond is present between NH3 and BF3?

53 / 89

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

54 / 89

Atom achieve stability by attaining electronic configuration of _________

55 / 89

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

56 / 89

Metals usually have ______________

57 / 89

Hydrogen bonding is always found in____________

58 / 89

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

59 / 89

The electropositive elements have tendency to _________

60 / 89

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

61 / 89

The force of attractive between water molecules is__________

62 / 89

The nature of a chemical bond can be predicted by using__________

63 / 89

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

64 / 89

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

65 / 89

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

66 / 89

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

67 / 89

Which sign indicates partial positive and partial negative charge?

68 / 89

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

69 / 89

Intermolecular forces are collectively known as__________

70 / 89

Non-polar compounds are insoluble in_________

71 / 89

The boiling point of NaCl is __________

72 / 89

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

73 / 89

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

74 / 89

At room temperature, higher molecular mass covalent compounds are ________

75 / 89

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

76 / 89

The electronic configuration of sodium atom is ____________

77 / 89

Epoxy adhesives are________

78 / 89

During the formation of ionic bond, heat____________

79 / 89

Which of the following is a building block of matter?

80 / 89

The electro-negative value of fluorine is____________

81 / 89

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

82 / 89

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

83 / 89

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

84 / 89

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

85 / 89

The position of an atom in the periodic table indicates its__________

86 / 89

Octet rule is __________

87 / 89

A bond pair in covalent molecules usually has_________

88 / 89

Which of the following is an electron deficient molecule?

89 / 89

Noble gases are non-reactive because they do not__________

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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.

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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