Difficulty of Carbon to Form a Stable Ion

Q. How many valence electrons are present in a carbon atom?

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

Q.

What is the charge of the carbon atoms nucleus?

1. - 6
2. + 6
3. + 4
4. - 4

Q.

Ionization potential increases across a period, from left to right?

Q.

Why do electron want to attain octet configuration

Q.

What is the purest form of carbon?

Q.

__ is the force which holds two or more atoms together in a stable molecule.

Q.

Which of the following has the lowest number of electrons in the valence shell?

1. Cl

2. B

3. N

4. O

Q.

Due to screening effect of electrons in an atom:

1. IE decreases

2. Attraction of nucleus on the valence electron increases

3. IE increases

4. No change in IE

Q.

Find out the valency of the atoms represented by Fig. (a) and (b).

Q.

Carbon has ___ electrons in its valence shell.

1. 4

2. 3
3. 8
4. 2

Q.

Lithium, sodium and potassium were put in one Group on the basis of their similar properties. What are those similar properties?

Q. Octet rule states that elements tend to combine by losing, gaining or sharing electrons such that each atom has eight electrons in its valence shell. Why only 8 electrons?

1. Because elements with less than 8 valence electrons are more stable.
2. Because noble gases have 8 electrons in their valence shell.
3. Because elements with less than 8 valence electrons are less stable.
4. Both B and C.

Q.

Question 40
Carbon, group (14) element in the Periodic Table, is known to form compounds with many elements. Write an example of a compound formed with
(a) Chlorine (group 17 of Periodic Table)
(b) Oxygen (group 16 of Periodic Table)

Q. How many electrons are present in the M shell, the outermost shell of argon?

Q.

What is the nature of the C-Cl bond in $CC{l}_4$ ?

__

Q.

The valencies or charges on some substances are given below

$$\begin{gathered} \mathrm{Zinc}\mathrm{ion}\left(2^{+}\right)\mathrm{Nitrogen}\left(3^{+}\right)\mathrm{Oxygen}\left(2^{-}\right)\mathrm{Phosphate}\mathrm{ion}\left(3^{-}\right) \\ \mathrm{Sodium}\mathrm{ion}\left(1^{+}\right)\mathrm{Bromide}\mathrm{ion}\left(1^{-}\right)\mathrm{Lead}\mathrm{ion}\left(2^{+}\right) \end{gathered}$$

Using the above information, write down the chemical formulae of the following:

1. Zinc phosphate
2. Nitrogen oxide
3. Sodium phosphate
4. Lead bromide

Q.

The atomic number of carbon atom is

1. $4$

2. $5$

3. $6$

4. $7$

Q.

Carbon is one of the most important non-metals because the existence of life on earth is based on carbon compounds.

1. True
2. False

Q.

Octet rule states that elements tend to combine in such a way that each atom has eight electrons in its valence shell. Why only 8 electrons?

1. Because 8 is a fancy number.

2. Because noble gases have 8 electrons in their valence shell.

3. It's a golden number.

4. Because elements with less than 8 valence electrons are more stable.

Q. Which of the following has the highest density?

1. $Fe$
2. $Ca$
3. $B$
4. $Pb$

Q. Which electron removal from the valence shell of a carbon atom requires the highest energy?

1. 3rd electron
2. 1st electron
3. 2nd electron
4. 4th electron

Q.

Carbon (Z=6) have 6 valence electrons

1. True
2. False

Q.

Choose the correct statement(s) related to carbon:

Statement 1: The chemical symbol for carbon is C.

Statement 2: The atomic number of carbon is 6.

Statement 3: It is metallic in nature.

Statement 4: It is a member of group 14 on the periodic table.

1. Only statement 3 is incorrect.

2. All statements are true.

3. Statement 3 and 4 are correct.

4. Statement 1 and 2 are correct.

Q.

Which of the following contains a coordinate covalent bond? This bond is also called a dative bond.

1. 

2. BaCl₂

3. H₂O

4. HCl

Q. If $E_1,E_2,E_{3}and{E}_4$ are the energies required to knock off the 1st, 2nd, 3rd and 4th electron respectively from the outermost orbit of the Carbon atom, choose the correct option:

1. $E_1$ > $E_2$ > $E_3$ > $E_4$
2. $E_1$ < $E_2$ < $E_3$ < $E_4$
3. $E_1$ < $E_2$ > $E_3$ < $E_4$
4. $E_1$ < $E_2$ < $E_3$ > $E_4$

Q.

Due to screening effect of electrons in an atom

1. Attraction of nucleus on the valence electron increases

2. IE increases

3. No change in IE

4. IE decreases

Q. How many electrons are present in the M shell, the outermost shell of argon?

Q. All elements achieve octet configuration by:

1. gaining electrons
2. losing electrons
3. sharing electrons
4. creating electrons

Q. Assertion :One of the most important factors in determining the chemical properties of an elements is the number of electrons in its outermost shell.
Reason: The number of electrons in the outer shell determines the bonding characteristics of an element.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Assertion :During covalent bonding the electro negativity difference between two atoms is greater than 1.7.
Reason: Covalent bond is formed by sharing of electrons between atoms that have same size.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect