Introduction to Carbon Family

Q. The element that does not show catenation is

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

Q. The catenation tendency of C, Si and Ge is in the order Ge<Si<C. The bond energies (in kJ mol${}^{-1}$) of $C-C,Si-Si$ and $Ge-Ge$ bonds, respectively are

1. 180, 167, 348
2. 260, 297, 348
3. 348, 167, 180
4. 348, 297, 260

Q. Name the ore of tin and lead.

1. cassiterite, galena
2. galena, Hematite
3. galena, bauxite
4. Magnetite , cassiterite

Q. Which one of the following element is metalloid?

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

Q. The electonic configuration of four different elements is given below. Identify the group 14 element among these

1. $\left[He\right]2s^1$
2. $\left[He\right]3s^2$
3. $\left[Ne\right]3s^{2}3p^5$
4. $\left[Ne\right]3s^{2}3p^2$

Q. The element that show catenation property is/are

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

Q. Name the element which is important component of ceramics, glass and cement.

1. C
2. Si
3. Al
4. Ca

Q. Which among the following is a stable isotope of C?
1. ${}^{12}C$ 2. ${}^{13}C$ 3. ${}^{14}C$

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

Q. Which one of the following does not belongs to group 14?
1. $\left[He\right]2s^1$ 2. $\left[He\right]3s^2$ 3. $\left[He\right]2s^{2}2p^2$ 4. $\left[Ne\right]3s^{2}3p^1$

1. 2, 3, 4
2. 1, 3, 4
3. only 2, 4
4. 1, 2, 4

Q. Which of the following is the radioactive isotope of carbon?

1. ${}^{12}C$
2. ${}^{13}C$
3. ${}^{14}C$
4. None of the above

Q. If $C{O}_2$ is passed in excess into lime water, the milkiness first formed disappears due to

1. reversal of the original reaction
2. formation of water soluble calcium bicarbonate
3. the solution getting heated by exothermic reaction
4. formation of volatile calcium derivative

Q. The correct order of catenation is

1. $C>Sn>Si\approx Ge$
2. $Si>Sn>C>Ge$
3. $Ge>Sn>Si>C$
4. $C>Si>Ge\approx Sn$

Q. Which one of the following element is metalloid?

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

Q.

In laboratory silicon can be prepared by the reaction

1. By heating carbon in electric furnace

2. By heating potassium with potassium dichromate

3. Silica with magnesium

4. None of these

Q. Which one of the following does not belongs to group 14?
1. $\left[He\right]2s^1$ 2. $\left[He\right]3s^2$ 3. $\left[He\right]2s^{2}2p^2$ 4. $\left[Ne\right]3s^{2}3p^1$

1. 1, 2, 4
2. 2, 3, 4
3. 1, 3, 4
4. only 2, 4

Q.

The number and type of bonds between two carbon atoms in $Ca{C}_2$ are

1. one sigma and one pi bond

2. one sigma and two pi bonds

3. one sigma and one and a half pi bond

4. one sigma bond