p-Block Elements (Group 13 & 14) · Question 8

The group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 kJ mol-1 respectively. The above values are lowest among their group members. The nature of their ions A2+ and B4+ respectively is

1. both reducing
2. oxidising and reducing
3. both oxidising
4. reducing and oxidising

The correct statements from the following are : Choose the correct answer from the options given below :

1. A, B, D and E only
2. A, C and D only
3. A, B, C and E
4. B, D and E only

Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. (B < Al), (Al < Ga), (Ga < In) and (In < Tl). Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius (M3+) than the other one. The atomic number of the element (X) is

1. 49
2. 81
3. 31
4. 13

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is correct but Statement II is incorrect
2. Both Statement I and Statement II are incorrect
3. Statement I is incorrect but Statement II is correct
4. Both Statement I and Statement II are correct

The elements of Group 13 with highest and lowest first ionisation enthalpies are respectively :

1. B & Tl
2. Tl & B
3. B & In
4. B & Ga

The correct orders among the following are Choose the correct answer from the options given below:

1. B and D Only
2. A and B Only
3. C and D Only
4. A and C Only

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is correct but Statement II is incorrect
2. Both Statement I and Statement II are correct
3. Statement I is incorrect but Statement II is correct
4. Both Statement I and Statement II are incorrect

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.

1. E Sn4+/Sn2+ = +0.15 V
2. E Al3+/Al = -1.66 V
3. E Pb4+/Pb2+ = +1.67 V
4. E Tl3+/Tl = +1.26 V

Consider the following elements In, Tl, Al, Pb, Sn and Ge. The most stable oxidation states of elements with highest and lowest first ionisation enthalpies, respectively, are

1. +4 and +1
2. +4 and +3
3. +1 and +4
4. +2 and +3