Classification of Elements and Periodicity in Properties · Question 16

A 'p'-block element (E) and hydrogen form a binary cation (EHx)+, while EH3 on treatment with K2HgI4 in alkaline medium gives a precipitate of basic mercury(II) amido-iodine. Given below are first ionisation enthalpy values ( kJ mol-1) for first element each from group 13, 14, 15 and 16. Identify the correct first ionisation enthalpy value for element E.

1. 1402
2. 1086
3. 801
4. 1312

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

Which of the following represents the correct trend for the mentioned property? Choose the correct answer from the options given below :

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

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

The atomic number of the element from the following with lowest 1st ionisation enthalpy is :

1. 32
2. 35
3. 19
4. 87

Choose the incorrect trend in the atomic radii (r) of the elements.

1. rRb < rCs
2. rAt < rCs
3. rBr < rK
4. rMg < rAl

Which of the following statements are correct? Choose the correct answer from the options given below:

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

Match the LIST-I with LIST-II Choose the correct answer from the options given below:

1. A-IV, B-I, C-II, D-III
2. A-IV, B-III, C-I, D-II
3. A-III, B-I, C-IV, D-II
4. A-II, B-III, C-IV, D-I

Electronic configuration of four elements A, B, C and D are given below: (A) 1s2 2s2 2p3 (B) 1s2 2s2 2p4 (C) 1s2 2s2 2p5 (D) 1s2 2s2 2p2 Which of the following is the correct order of increasing electronegativity (Pauling's scale)?

1. D < A < B < C
2. A < B < C < D
3. A < C < B < D
4. A < D < B < C

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