Classification of Elements and Periodicity in Properties · Question 6

The 1st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of the 2nd ionization enthalpy of Mg is .

1. −906 kJ/mol
2. −856 kJ/mol
3. +1450 kJ/mol
4. +590 kJ/mol

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

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :

1. Na2O, K2O, Al2O3 and As2O3
2. Al2O3, As2O3, CO and NO
3. K2O, Cl2O7, As2O3 and NO
4. Na2O, N2O, Al2O3 and CO

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

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.

1. Rb & Br
2. Na & Cl
3. K & Br
4. K & Se

Consider the elements N, P, O, S, Cl and F. The number of valence electrons present in the elements with most and least metallic character from the above list is respectively.

1. 7 and 5
2. 6 and 7
3. 5 and 7
4. 5 and 6

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

1. Both Statement I and Statement II are false
2. Statement I is false but Statement II is true
3. Statement I is true but Statement II is false
4. Both Statement I and Statement II are true

The correct order of C, N, O and F in terms of second ionisation potential is

1. C < N < F < O
2. C < F < N < O
3. F < N < C < O
4. C < O < N < F

The correct trend in the first ionization enthalpies of the elements in the 3rd period of periodic table is :

1. Si < S < Al < P < Cl
2. Al < Si < S < P < Cl
3. S < Si < Al < P < Cl
4. Al < S < P < Si < Cl

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

1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false