Introduction to p Block Elements

Q.

Which of the following statements is true about element R present in ${13}^{th}$ group of the periodic table?

1. It forms

2. It forms

3. It is gas at room temperature

4. It has oxidation state of + 4

Q.

Which of the following is a non-metal

1. Indium

2. Boron

3. Gallium

4. Aluminium

Q.

Which is true for an element present in group 13 of the periodic table ?

1. It is gas at room temperature

2. It has oxidation state of +4

3. It forms RX₂

4. It forms R₂O₃

Q.

Which is the most abundant metal in the Earth’s crust?

1. Germanium

2. Lead

3. Aluminium

4. Silicon

Q.

Among group 13 and group 14 elements, which is the most abundant in Earth’s crust?

1. Silicon

2. Aluminium

3. Carbon

4. Boron

Q. Choose the correct statement

1. Boron is a rare element.
2. Aluminium is the least abundant metal
3. B exist in two isotopic form, ${}^{10}Band{}^{11}B$
4. B exist in two isotopic form, ${}^{10}Band{}^{12}B$

Q. Which among the following shows metallic character ?
B, Ga, In, Tl

1. All B, Ga, In, Tl
2. only B
   
3. Only Tl
4. Ga, In, Tl

Q. Which of the followings are consequences of poor shielding effect of d and f orbital?

1. Atomic radius of Ga is smaller than Al
2. Irregular trends in the I.E. values are observed between Al and Ga
3. Ionisation energy of Tl is greater than In
4. Ionisation energy of Al is lesser than B

Q. Group 13 elements exhibit

1. Only +3 Oxidation state
2. Only + 1 oxidation state
3. Both +1 and +3 oxidation states
4. +1, +2 and +3 oxidation states.

Q. What is the outer electronic configuration of group 13 elements?

1. $n{s}^{2}n{p}^1$
2. $n{s}^{2}n{p}^2$
3. $n{s}^{2}n{p}^3$
4. $n{s}^{2}n{p}^4$