In Which Of The Following Arrangement The Order Is Not According To The Property Indicated Against It?

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Question

In which of the following arrangement the order is not according to the property indicated against it?

easy

Solution

Correct option is

B < C < N < O: Increasing first ionisation enthalpy

(a) Metallic radii increase in a group from top to bottom.

Thus, Li < Na < K < Rb is true

(b) Electron gain enthalpy of Cl > F and decreases along a group.

Thus, I < Br < F < Cl is true.

(c) Ionisation enthalpy increases along a period from left to right but due to presence of half-filled orbital in N, ionisation enthalpy of N > O.

Thus, B < C < N < O is incorrect.

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SIMILAR QUESTIONS

Q1

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

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Q2

Which is likely to show inert pair effect?

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Q3

The correct order of the size of iodine species is

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Q4

In which one of the following pairs the radius of the second species is greater than that of the first?

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Q5

The increasing order of the first ionisation enthalpies of elements B, P, S and F (lowest first) is

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Q6

The element having highest electron affinity is

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Q7

Diagonal relationship is for

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Q8

The correct order according to size is

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Q9

The successive ionisation energy values for an element ‘X’ are given below:

1^st ionisation energy = 410 kJ mol^–1

2^nd ionisation energy = 820 kJ mol^–1

3^rd ionisation energy = 1100 kJ mol^–1

4^th ionisation energy = 1500 kJ mol^–1

5^th ionisation energy = 3200 kJ mol^–1

Find out the number of valence electrons for the atom ‘X’.

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Q10

Which is the correct order of electronegativity?

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