chemistry 9th class chapter 4 solved exercise

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

At room temperature, higher molecular mass covalent compounds are ________

2 / 89

All the noble gases have their valence electrons_________

3 / 89

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

4 / 89

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

5 / 89

A molecule is formed, when energy of a system___________

6 / 89

Identify which pair has polar covalent bonds________

7 / 89

Triple covalent bond involves how many numbers of electrons?

8 / 89

The electropositive elements have tendency to _________

9 / 89

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

10 / 89

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

11 / 89

Which sign indicates partial positive and partial negative charge?

12 / 89

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

13 / 89

The difference between electronegativities of hydrogen and chlorine________

14 / 89

Hydrogen and helium follow ________

15 / 89

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

16 / 89

Which of the following do not show ions in water?

17 / 89

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

18 / 89

The force of attractive between water molecules is__________

19 / 89

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

20 / 89

Intermolecular forces are collectively known as__________

21 / 89

Atoms react with each other because_________

22 / 89

Which of the following is a building block of matter?

23 / 89

Which of the following is an electron deficient molecule?

24 / 89

The density of ice at 0°C is __________

25 / 89

The electro-negative value of fluorine is____________

26 / 89

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

27 / 89

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

28 / 89

Which type of adhesives is less expensive to produce?

29 / 89

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

30 / 89

Ionic compounds have________

31 / 89

Metals have the tendency to lose electrons due to ________

32 / 89

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

33 / 89

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

34 / 89

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

35 / 89

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

36 / 89

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

37 / 89

Non-polar compounds are insoluble in_________

38 / 89

The boiling point of alcohol is ____________

39 / 89

Mode of reaction depends upon its_________

40 / 89

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

41 / 89

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

42 / 89

A bond pair in covalent molecules usually has_________

43 / 89

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

44 / 89

Metals usually have ______________

45 / 89

Covalent bond is most commonly found between the elements of group_________

46 / 89

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

47 / 89

The position of an atom in the periodic table indicates its__________

48 / 89

The density of water at 0°C  is_________

49 / 89

The boiling point of NaCl is __________

50 / 89

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

51 / 89

Which of the following is the weakest bond amongst them?

52 / 89

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

53 / 89

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

54 / 89

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

55 / 89

Dative covalent bond is also known as________

56 / 89

Hydrogen bonding is always found in____________

57 / 89

Noble gases are non-reactive because they do not__________

58 / 89

A covalent bond formed by two similar atoms is known as________

59 / 89

Which molecule contains a single covalent bond?

60 / 89

How many covalent bonds does C2H2 molecule have?

61 / 89

Attaining two electrons in the valence shell is called__________

62 / 89

The electronic configuration of sodium atom is ____________

63 / 89

Identify the compound which is not soluble in water__________

64 / 89

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

65 / 89

The compounds formed by oppositely charges are known as _________

66 / 89

The boiling point of water is ____________

67 / 89

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

68 / 89

Epoxy adhesives can be made________

69 / 89

Transfer of electrons between elements result in________

70 / 89

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

71 / 89

Ice floats on water because____________

72 / 89

Epoxy adhesives are also known as_________

73 / 89

Octet rule is __________

74 / 89

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

75 / 89

Epoxy adhesives are________

76 / 89

Atom achieve stability by attaining electronic configuration of _________

77 / 89

The electronegative elements have_________

78 / 89

Covalent bond involves the _______

79 / 89

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

80 / 89

The melting point of NaCl is___________

81 / 89

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

82 / 89

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

83 / 89

Which type of bond is present between NH3 and BF3?

84 / 89

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

85 / 89

Which of the following is an example of covalent compound?

86 / 89

Nitrogen molecule contain_________

87 / 89

The nature of a chemical bond can be predicted by using__________

88 / 89

During the formation of ionic bond, heat____________

89 / 89

Which type of attractive forces are present in ionic compounds?

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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