Classification of Elements and Periodicity in Properties

In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right element, except noble gases, are respectively.

1. lowest and lowest
2. highest and lowest
3. lowest and highest
4. highest and highest

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

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

A monoatomic anion (A-) has 45 neutrons and 36 electrons. Atomic mass, group in the periodic table and physical state at room temperature of the element (A) respectively are

1. 80, 17, liquid
2. 81, 16, solid
3. 80, 16, gas
4. 81, 15, gas

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

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

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

The incorrect decreasing order of atomic radii is

1. Si > P > Cl > F
2. Mg > Al > C > O
3. Al > B > N > F
4. Be > Mg > Al > Si

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