Introduction to Carbon and Its Occurrences

Q.

N shell can have a maximum of _______________ electrons.

Q.

What are unpaired valence electron?

Q.

The chemical formula of ice is

Q.

Can u pls explain this rule 2 :The outermost shell cannot have more than 8 electrons. The penultimate shell cannot have more than 18 electrons. A new shell is formed as soon as the outermost shell attains 8 electrons

Q. The second shell in an atom can accommodate a maximum of how many electrons?

1. 3
2. 8
3. 2
4. 6

Q.

What are saturated and unsaturated hydrocarbons compound ?

Q. According to the formula 2n² there should be 18electrons but we put only 8 electrons. Why??

Q. Carbon atoms can form long chains by sharing their valence electrons with other carbon atoms. This property is known as _________.

1. valency
2. carbonization
3. catenation
4. allotropy

Q.

The following diagram shows the various shells of electrons. The maximum number of electrons that can be accomodated in L shell is ________ .

1. 8

2. 32

3. 18

4. 2

Q.

Why do each energy shell of atom can hold only a particular number of electrons?

Q.

How is carbon $14$ formed?

Q.

Which element is considered as the most versatile atom on Earth?

1. Chlorine

2. Hydrogen

3. Oxygen

4. Carbon

Q. Explain why fossil fuels are exhaustible natural resources.​

Q. In the neutralization process of $H_{3}P{O}_4$ and $NaOH$, the number of buffers formed will be__________.

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

Q. Dry ice $\left(solid{CO}_2\right)$ is a/an :

1. molecular crystal
2. ionic crystal
3. covalent crystal
4. metallic crystal

Q. What are the number of electrons in the dofferent number of shells ?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Name one substace which can exist in all three states also mention its form in solid, liquid and gas.

Q. The word 'genuine' could best be replaced by which of the following?

1. Palpable
2. Spurious
3. Real
4. Accurate