Covalent Bonding of N, O with H and Polarity

Q. Question 3
A molecule of ammonia $\left({\text{NH}}_3\right)$ has:

(a) Only single bonds
(b) Only double bonds
(c) Only triple bonds
(d) One double bond and remaining are single bonds

Q.

Give reason as to why-hydrogen chloride can be termed as a polar covalent compound.

Q.

Define: (a) an electrovalent compound (b) a covalent compound.

Q. Is sulphur form double bond?

Q. In $H_{2}O$ molecule, total number of single bonds are ___.

Q.

The total number of single bonds in a water molecule are:

1. 4

2. 2

3. 3

4. 1

Q.

Give an example of a chemical element which forms a diatomic molecule.

Q. In a water molecule, there is/are ______ valence electron(s) of oxygen which do not take part in the covalent bond formation.

1. four
2. two
3. one
4. three

Q. The total number of single bonds in $H_{2}O$ molecule are _____.

1. 1
2. 2
3. 3
4. 4

Q.

Give reasons for the following

1)molecules of hydrogen and chlorine have single covalent bonds between their atoms while oxygen has a double covalent and nitrogen a triple covalent bond respectively.

Q.

The total number of single bonds in a water molecule are:

1. 2

2. 1

3. 3

4. 4

Q. A light lustrous substance used in metallurgical furnaces or any other industrial furnaces is known as _______.

1. hard coke
2. coal
3. tar
4. lampblack

Q.

What type of bonds is present in a water molecule? Draw the electron dot structure of waster $\left(H_{2}O\right)$.

Q. In a water molecule, there is/are ______ valence electron(s) of Oxygen which do not take part in the covalent bond formation.

1. three
2. four
3. two
4. one

Q.

How many electron pairs are shared between carbon and hydrogen atoms in ${\text{CH}}_4$?

1. two
2. eight
3. six
4. four

Q.

In a $H_{2}O$ molecule, total number of single bonds are___

Q. Question 50 (c)
An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

Draw the electron dot structure for ammonia and what type of bond is formed in it?