Covalent Bonding in H2, N2 and O2

Q. What are alpha beta and gamma carbon atoms

Q.

Why is phosphorus written as ${\mathrm{P}}_4$?

Q.

How many valence electron does oxygen contain? How many electrons will it share with another oxygen atom?

1. Valence electron of oxygen is 4 and each oxygen atom will share only 2 valence electrons to make a bond with another oxygen.

2. Valence electron of oxygen is 4 and each oxygen atom will share only 1 valence electron to make a bond with another oxygen atom.

3. Valence electron of oxygen is 6 and each oxygen atom will share 4 valence electrons to make a double bond with another oxygen atom.

4. Valence electron of oxygen is 6 and each oxygen atom will share 2 valence electrons to make a bond.

Q.

Why is a double bond stronger than a single bond?

Q. Why the single bond is more stronger than the double bond.

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. two
3. one
4. four

Q.

Arrange the strength of single bond, double bond and triple bond in increasing order.

1. Double bond > Single bond > Triple bond

2. Triple bond = Single bond = Double bond

3. Triple bond < Double bond < Single bond

4. Triple bond > Double bond > Single bond

Q. All elements tend to obey octet rule except hydrogen. Why is it so?

1. Because hydrogen is in the gaseous state.
2. Because hydrogen can accommodate a maximum of 2 electrons in its valence shell.
3. Because hydrogen is a metal.
4. The question is wrong. Hydrogen obeys the octet rule.

Q. When a carbon atom shares its valence electrons with other atoms, it attains its nearest noble gas configuration, which is of _______.

Q.

Atomic number of nitrogen is 7. What can be inferred from this?

1. Nitrogen will share 3 electrons to form a diatomic molecule.

2. Nitrogen will form 2 bonds with another nitrogen molecule and attain octet configuration.

3. Nitrogen will share only 2 electrons to form a diatomic molecule.

4. Nitrogen atom doesn't share electron as its octet is complete.

Q. What do you mean by stability of an atom?

Q.

Explain by drawing a geometric diagram, how a sodium atom forms a sodium ion

Q.

Nitric oxide violates the octet rule because __________.

1. It has more than 8 electrons around the nitrogen atom.

2. Both its atoms have negative formal charges.

3. It forms a double bond instead of a single bond.

4. It has an unpaired electron.

Q. Which carbon to carbon bond is the stronger than the other?( In the video it said single bond is strongest but in my books it is written triple bond is strongest)

Q.

Why are Oxygen and Hydrogen Diatomic?

Q.

Identify the radical associated with -3 valency ?

1. Peroxide

2. Nitrite

3. Oxide

4. Nitride

Q. Identify the correct Lewis dot structure of $O_2$ molecule.

1. 

2. 

3. 

4. 

Q. Which of the following are the required conditions to form a covalent bond?

1. Low electron affinity of both the atoms
2. Low ionization energies of both the atoms
3. High electronegativities of both the atoms
4. High electronegativity difference between the participating atoms

Q.

Give examples of covalent compounds which contain :

(a) One unshared pair of electron (b) Two unshared pairs of electrons.

Q.

When Hydrogen atoms combine with carbon atoms to form methane, ___ is released.

Q.

Write the electron dot structure for the following compound: ${\mathrm{O}}_2$.

Q.

A molecule of _____ (hydrogen/ ammonia/ nitrogen) contains a triple bond.

Q. How many electron pairs are shared in the covalent bond formation between 2 chlorine atoms in a ${\mathrm{Cl}}_2$ molecule?

Q. Explain about the following.
(a) Single bond
(b) Double bond
(c) Triple Bond

Q.

A compound having one lone pair of electrons:

1. Water

2. Methane

3. Ammonia

4. Hydrogen sulphide

Q. What happens when methane and chlorine are exposed to direct sunlight.

Q.

All elements combine to obey octet rule except hydrogen. Why?

1. Because hydrogen is in gaseous state.

2. Because hydrogen can accommodate a maximum of 2 electrons in its first shell.

3. Because hydrogen is metal.

4. No, the question is wrong. Hydrogen obeys the octet rule.

Q. Identify the correct Lewis dot structure of $O_2$ molecule.

1. 

2. 

3. 

4. 

Q. How many bonds are formed between two carbon atoms with 4 shared electrons?

1. Three single bonds
2. A double bond and a single bond
3. A triple bond
4. A double bond

Q. All elements combine to obey octet rule except hydrogen. Why?

1. Because hydrogen is in gaseous state.
2. Because hydrogen can accommodate a maximum of 2 electrons in its first shell.
3. No, the question is wrong. Hydrogen obeys octet rule
4. Because hydrogen is metal