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

Ice floats on water because____________

2 / 89

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

3 / 89

Epoxy adhesives are________

4 / 89

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

5 / 89

Identify which pair has polar covalent bonds________

6 / 89

Attaining two electrons in the valence shell is called__________

7 / 89

The position of an atom in the periodic table indicates its__________

8 / 89

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

9 / 89

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

10 / 89

The force of attractive between water molecules is__________

11 / 89

The boiling point of NaCl is __________

12 / 89

Atom achieve stability by attaining electronic configuration of _________

13 / 89

Which type of attractive forces are present in ionic compounds?

14 / 89

The electropositive elements have tendency to _________

15 / 89

Mode of reaction depends upon its_________

16 / 89

The nature of a chemical bond can be predicted by using__________

17 / 89

Intermolecular forces are collectively known as__________

18 / 89

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

19 / 89

Metals usually have ______________

20 / 89

Which of the following is the weakest bond amongst them?

21 / 89

Which of the following is an example of covalent compound?

22 / 89

The density of ice at 0°C is __________

23 / 89

Identify the compound which is not soluble in water__________

24 / 89

The density of water at 0°C  is_________

25 / 89

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

26 / 89

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

27 / 89

The electronegative elements have_________

28 / 89

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

29 / 89

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

30 / 89

At room temperature, higher molecular mass covalent compounds are ________

31 / 89

The melting point of NaCl is___________

32 / 89

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

33 / 89

Epoxy adhesives can be made________

34 / 89

Noble gases are non-reactive because they do not__________

35 / 89

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

36 / 89

Octet rule is __________

37 / 89

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

38 / 89

Nitrogen molecule contain_________

39 / 89

All the noble gases have their valence electrons_________

40 / 89

A molecule is formed, when energy of a system___________

41 / 89

Which of the following is a building block of matter?

42 / 89

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

43 / 89

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

44 / 89

Non-polar compounds are insoluble in_________

45 / 89

The electronic configuration of sodium atom is ____________

46 / 89

Transfer of electrons between elements result in________

47 / 89

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

48 / 89

The boiling point of water is ____________

49 / 89

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

50 / 89

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

51 / 89

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

52 / 89

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

53 / 89

The difference between electronegativities of hydrogen and chlorine________

54 / 89

Which type of adhesives is less expensive to produce?

55 / 89

Covalent bond involves the _______

56 / 89

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

57 / 89

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

58 / 89

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

59 / 89

Metals have the tendency to lose electrons due to ________

60 / 89

During the formation of ionic bond, heat____________

61 / 89

Covalent bond is most commonly found between the elements of group_________

62 / 89

Hydrogen bonding is always found in____________

63 / 89

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

64 / 89

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

65 / 89

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

66 / 89

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

67 / 89

A bond pair in covalent molecules usually has_________

68 / 89

Epoxy adhesives are also known as_________

69 / 89

Dative covalent bond is also known as________

70 / 89

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

71 / 89

Triple covalent bond involves how many numbers of electrons?

72 / 89

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

73 / 89

Ionic compounds have________

74 / 89

Which molecule contains a single covalent bond?

75 / 89

The boiling point of alcohol is ____________

76 / 89

A covalent bond formed by two similar atoms is known as________

77 / 89

The compounds formed by oppositely charges are known as _________

78 / 89

The electro-negative value of fluorine is____________

79 / 89

Which of the following is an electron deficient molecule?

80 / 89

Atoms react with each other because_________

81 / 89

How many covalent bonds does C2H2 molecule have?

82 / 89

Hydrogen and helium follow ________

83 / 89

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

84 / 89

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

85 / 89

Which type of bond is present between NH3 and BF3?

86 / 89

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

87 / 89

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

88 / 89

Which of the following do not show ions in water?

89 / 89

Which sign indicates partial positive and partial negative charge?

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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