Chapter 8: Structure of Molecules Chemistry Mcqs for High School - Grade 9 - Set 2

1)   When one atom forms cation by losing an electron and other forms anion by accepting that electron then bond form between them is

a. Covalent bond
b. Ionic bond
c. coordinate covalent bond
d. single covalent bond
Answer  Explanation 

ANSWER: Ionic bond

Explanation:
No explanation is available for this question!


2)   Nobel gases are stable because they contain

a. 7 electrons in valence shell
b. 8 electrons in valence shell
c. 5 electrons in valence shell
d. 4 electrons in valence shell
Answer  Explanation 

ANSWER: 8 electrons in valence shell

Explanation:
No explanation is available for this question!


3)   Bonds which involve 3 shared electron pairs are

a. double covalent bond
b. single covalent bond
c. triple covalent bond
d. coordinate covalent bond
Answer  Explanation 

ANSWER: triple covalent bond

Explanation:
No explanation is available for this question!


4)   To form anion, the non-metal atom

a. looses electrons
b. gains electron
c. losses protons
d. gain protons
Answer  Explanation 

ANSWER: gains electron

Explanation:
No explanation is available for this question!


5)   When two identical atoms share electron pairs and exert force on each other then the bond form is

a. non-polar covalent bond
b. polar covalent bond
c. double covalent bond
d. coordinate covalent bond
Answer  Explanation 

ANSWER: non-polar covalent bond

Explanation:
No explanation is available for this question!


6)   Synthetic resins are used in places where

a. air resistance is required
b. water resistance is required
c. friction is required
d. adhesion is required
Answer  Explanation 

ANSWER: water resistance is required

Explanation:
No explanation is available for this question!


7)   Oxygen belongs to group VIA so the number of electrons in its valence shell is

a. 6
b. 7
c. 8
d. 4
Answer  Explanation 

ANSWER: 6

Explanation:
No explanation is available for this question!


8)   Electron pairs which are not shared by atoms are called

a. electron pairs
b. lone pairs
c. proton pairs
d. shell pairs
Answer  Explanation 

ANSWER: lone pairs

Explanation:
No explanation is available for this question!


9)   The strength of intermolecular forces from the ionic or covalent bond is

a. weaker
b. stronger
c. equal
d. none of above
Answer  Explanation 

ANSWER: weaker

Explanation:
No explanation is available for this question!


10)   Ionic crystals have

a. low melting points
b. moderate melting points
c. high melting points
d. none of above
Answer  Explanation 

ANSWER: high melting points

Explanation:
No explanation is available for this question!


11)   Helium is chemically

a. active
b. inert
c. unstable
d. none of above
Answer  Explanation 

ANSWER: inert

Explanation:
No explanation is available for this question!


12)   The bond formed by mutual sharing of the electron is

a. ionic bond
b. coordinate covalent bond
c. covalent bond
d. none of above
Answer  Explanation 

ANSWER: covalent bond

Explanation:
No explanation is available for this question!


13)   When atoms lose or gain electrons they acquire configuration of

a. next noble gas
b. halogens
c. alkali metals
d. alkaline metals
Answer  Explanation 

ANSWER: next noble gas

Explanation:
No explanation is available for this question!


14)   The covalent compound among the following is

a. NaCl
b. MgO
c. H2O
d. KF
Answer  Explanation 

ANSWER: H2O

Explanation:
No explanation is available for this question!


15)   The melting point of table salt is

a. 800 °C
b. 801 °C
c. 901 °C
d. 1000 °C
Answer  Explanation 

ANSWER: 801 °C

Explanation:
No explanation is available for this question!