Physical Properties of Carbon Family

Q. Which of the following is/are not correctly matched?
(i) $Ge{O}_2-$ acidic (ii) $Pb{O}_2-$ Amphoteric
(iii) $CO$ - Neutral (iv) $Si{O}_2-$ Amphoteric

1. (i) and (iv)
2. (iv) only
3. (ii) only
4. (iii) only

Q.

What happens to the melting point of d-block elements across a period?

Q.

How does the electronegativity of p-block elements change across a period?

Q. The element with highest electronegativity among the following is:

1. C
2. Si
3. Sn
4. Ge

Q. Which of the following element is affected by water?

1. C
2. Si
3. Pb
4. Sn

Q. The element with highest electronegativity among the following is:

1. C
2. Si
3. Ge
4. Sn

Q. Which of the following has the smallest atomic radii?

1. B

2. Al

3. Si

4. C

Q.

Which of the following has the maximum covalent radii?

1. C

2. Si

3. Ge

4. Sn

Q. Which of the following statement is true?

1. $C{O}_2,Si{O}_2\text{and}Ge{O}_2$ are acidic in nature.
2. GeO is basic in nature.
3. CO is neutral in nature.
4. SnO and PbO are amphoteric in nature

Q. The correct order of melting point of group 14 elements is :

1. $C>Si>Ge>Sn<Pb$
2. $C<Si<Ge<Sn>Pb$
3. $C>Si>Ge>Sn>Pb$
4. $C<Si<Ge<Sn<Pb$

Q. Choose the correct statement(s):
1. Carbon has unique ability to form pπ−pπ multiple bonds with itself .
2. Pb, Sn donot form pπ−pπ multiple bonds.
3. Carbon can accomodate more than 4 electron.

1. 1, 2, 3
2. only 1 and 2
3. Only 2 and 3
4. only 1 and 3

Q.

Which of the following has the maximum covalent radii?

1. C

2. Si

3. Ge

4. Sn

Q. The element with highest electronegativity among the following is:

1. C
2. Si
3. Ge
4. Sn

Q. On going down the group there is a considerable increase in covalent radius from C to Si, followed by a small increase from Si to Pb. This is due to

1. Greater shielding affect of d-orbitals
2. Greater shielding effect of f-orbitals
3. Presence of fully filled d and f- orbitals
4. Both (a) and (b)

Q. Which of the following is most electronegative?

1. C

2. B

3. Al

4. Ge

Q. The stability of hydrides of the carbon family is in the order:

1. $C{H}_4>Si{H}_4>Ge{H}_4>Sn{H}_4>Pb{H}_4$
2. $C{H}_4<Si{H}_4<Ge{H}_4<Sn{H}_4<Pb{H}_4$
3. $C{H}_4>Sn{H}_4>Ge{H}_4>Si{H}_4>Pb{H}_4$
4. None of these

Q. The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniform. White metallic tin buttons got converted to grey powder. This transformation is related to:

1. an interaction with water vapour contained in humid air
2. a change in crystalline structure of tin
3. a change in the partial pressure of $O_2$ in air
4. an interaction with $N_2$ of air at low temperature

Q. Which of the following is most electronegative?

1. C

2. B

3. Ge

4. Al