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Test: Covalent Bonding of Non Metals - Class 10


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

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Test: Covalent Bonding of Non Metals - Question 1

In methane, the valency of carbon is:

Detailed Solution for Test: Covalent Bonding of Non Metals - Question 1

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.

Test: Covalent Bonding of Non Metals - Question 2

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

Detailed Solution for Test: Covalent Bonding of Non Metals - Question 2

Covalent bonds are formed by sharing of electrons.

Test: Covalent Bonding of Non Metals - Question 3

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

Detailed Solution for Test: Covalent Bonding of Non Metals - Question 3

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.

Test: Covalent Bonding of Non Metals - Question 4

Most of covalent compounds are found in

Detailed Solution for Test: Covalent Bonding of Non Metals - Question 4

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.

Test: Covalent Bonding of Non Metals - Question 5

Shared electron pair in covalent compound AB will be drawn:

Detailed Solution for Test: Covalent Bonding of Non Metals - Question 5

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

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