Introduction to Carbon Family

Q.

In the ground state, carbon atom has how many unpaired electron(s)?

1. 1

2. 2

3. 3

4. 4

Q. The carbide which gives propyne on hydrolysis is :

1. CaC2

2. Fe3C

3. Al4C3

4. Mg2C3

Q. 17. Crystalline solids are anisotropic in nature. What does this statement mean?

Q. When a mixture of carbon monoxide and chlorine is exposed to sunlight the product formed is :

1. Thionyl chloride
2. Phosgene
3. Phosphine
4. Carbon tetrachloride

Q. Why is $P{b}^{4+}$ less stable than $P{b}^{2+}$ ?

1. Due to poor shieding of $6s^2$electron by inner d and f electron
2. Due to poor shieding of $6p^2$electron by inner s and f electron
3. Due to poor shieding of $6f^{14}$electron by inner electron
4. Due to poor shieding of $5d^{10}$electron by inner f electron

Q.

The number and type of bonds between two carbon atoms in calcium carbide are

1. One sigma, one pi

2. Two sigma, one pi

3. One sigma, two pi

4. Two singma, two pi

Q. The carbide which gives propyne on hydrolysis is :

1. $A{l}_4{C}_3$
2. $Ca{C}_2$
3. $F{e}_{3}C$
4. $M{g}_2{C}_3$

Q. $C{O}_2$ is isostructural with

1. $HgC{l}_2$
2. $SnC{l}_2$
3. $C_2{H}_2$
4. $N{O}_2$

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

Q. When a mixture of carbon monoxide and chlorine is exposed to sunlight the product formed is :

1. Thionyl chloride

2. Phosgene

3. Phosphine

4. Carbon tetrachloride

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

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

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

Q. $C{O}_2$ is isostructural with

1. $HgC{l}_2$
2. $SnC{l}_2$
3. $C_2{H}_2$
4. $N{O}_2$

Q. Solve Q 21.
21. A power company burns approximately 474 tons of coal per day to produce electricity. If the sulphur content of the coal is 1.30 % by weight, how many tons $S{O}_2$ are dumped into the atmosphere each day?

Q. Which one of the following elements is/are non-metal?

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