Covalent Bonding in Similar Atoms

Q.

How many chemical bonds are there between the carbon atom and oxygen atom in the compound - carbon dioxide?

Q.

What is the ground-state electronic configuration of $\mathrm{Si}$?

Q.

Which metal oxides are acidic?

Q.

A ___________ is formed when two or more atoms bond chemically.

1. compound

2. element

3. molecule

4. radical

Q.

What do you understand by the term covalency?

Q. In a hydrogen molecule, two hydrogen atoms are held together by a single bond.

1. True
2. False

Q. Compound X consists of molecules . What type of bonding takes place and why

Q. What are radicals

Q.

When Carbon disulphide is burnt in an excess of Oxygen gas, the ratio of moles of ${\mathrm{CO}}_2$ to ${\mathrm{SO}}_2$ gases produced is :

1. 1:1

2. 1:2

3. 2:1

4. 2:3

Q.

How many electrons are shared in between the atoms of Nitrogen molecule?

1. 3

2. 1

3. 6

4. 10

Q.

Consider the elements $\mathrm{Na}$, $\mathrm{Mg}$ and $\mathrm{Al}$ and their respective atomic numbers $11$, $12$ and $13$. Write the electronic configuration of each.

Q.

What do you mean by radical?

Q. The valency of an oxygen atom is ______.

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

Q.

An element with electronic configuration 2, 8, 2, belongs to which period and group.

Q.

What type of electronic configuration corresponds to the chemical nonreactivity of elements?

Q.

Which one of the following elements exhibits maximum number of Valence Electrons?

1. Na

2. Al

3. Si

4. P

Q. How many unpaired electron does $O_2$ molecule have?

1. $1$
2. $0$
3. $2$
4. $3$

Q.

Which of the following are molecules?

(i) O₂

(ii) Argon

(iii) Ammonia

(iv) Helium

(v) Water

(vi) Sugar

1. i, iii, v, vi
2. i, iv, ii
3. iii, v, vi
4. ii, iv, v

Q. How many valence electrons of each oxygen are involved in the formation of a molecule of oxygen?

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

Q. How many numbers of lone pair of electrons are there in $O_2$ molecule?

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

Q. Nitrogen molecule, in which each nitrogen atom has ______ electrons in its valence shell and required three electrons to complete the octet.

1. 5
2. 4
3. 3
4. 2

Q. What is the total number of electrons that take part in forming bond in $N_2$ molecule?

1. 4
2. 2
3. 6
4. 10

Q. How many anti bonding electrons are there in $O_2$ molecule?

1. $10$
2. $4$
3. $6$
4. $8$

Q. Electronic configuration of an atom is $2,8,7$.
To which of the following elements, would it be chemically similar?

1. Nitrogen $(Z=7)$
2. Argon $(Z=18)$
3. Fluorine $(Z=9)$
4. Phosphorus $(Z=15)$

Q. What is the meaning of the term "oxygen valency" ??

Q. Number of bonding electrons and anti-bonding electrons in $2p$ MO of $N_2$ molecule are respectively:

1. $6,2$
2. $4,0$
3. $6,0$
4. $4,2$

Q. Hydrogen molecule consists of ______ covalent bond(s).

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

Q. Which $MO$ is the HOMO of $O_2$ molecule?

1. $2{\pi }^{\ast }$
2. $2{\sigma }^{\ast }$
3. $2\pi$
4. $2\sigma$

Q. $\underset{\left(g\right)}{N_2}+\underset{\left(g\right)}{O_2}+$ Heat $\to \underset{\left(g\right)}{2NO}$
What information do you get from the above equation ? Comment.

Q. Explain the formation of a double bond in oxygen molecule.