Test: Covalent Bonding of Non Metals


5 Questions MCQ Test Science Class 10 | Test: Covalent Bonding of Non Metals


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Attempt Test: Covalent Bonding of Non Metals | 5 questions in 10 minutes | Mock test for Class 10 preparation | Free important questions MCQ to study Science Class 10 for Class 10 Exam | Download free PDF with solutions
QUESTION: 1

In methane, the valency of carbon is:

Solution:

Methane has its molecular formula CH4.
It is formed by one carbon atom and four hydrogen atoms. 
Hydrogen has its valency 1 and carbon being tetravalent needs four valence electrons to acquire noble gas configuration, where it shares its 4 electrons with four hydrogen atoms.
Therefore, the valency of carbon atom in Methane (CH4) is 4.

QUESTION: 2

The bond which is formed by sharing of an electron pair between two atoms is known as:

Solution:

Covalent bonds are formed by sharing of electrons.

QUESTION: 3

Which of the following is a non-polar molecule?​

Solution:

When 2 molecules of different electronegativity are bonded together covalently the bonding electron cloud is more attracted towards atom with higher electronegativity. So, the bond between 2 Oxygen atom is non-polar . Since, it is the only bonding in oxygen molecule Oxygen molecule is non-polar.

QUESTION: 4

Most of covalent compounds are found in

Solution:

Compounds having lesser number of carbon atoms are gases like CH4, C4H10 and some are liquids. Compounds having greater number of carbon atoms are solids.

QUESTION: 5

Shared electron pair in covalent compound AB will be drawn:

Solution:

Because the shared pair of electrons always stays in between two elements.

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