Consider the following orders against the mentioned property:

I. $Mg < Si < Al < S < P$ (2nd ionisation potential)

II. ${Na}_{2} O < MgO < {Al}_{2} O_{3} < P_{2} O_{5}$ (Acidic strength)

III. $C < N < O < F$ (Electron affinity)

The incorrect order(s) is/are

Question

Consider the following orders against the mentioned property:

I. $Mg < Si < Al < S < P$ (2nd ionisation potential)

II. ${Na}_{2} O < MgO < {Al}_{2} O_{3} < P_{2} O_{5}$ (Acidic strength)

III. $C < N < O < F$ (Electron affinity)

The incorrect order(s) is/are

Smart Achievers · Accepted Answer

(3)

Hint: On moving left to right, acidic strength of oxide increases.

Correct order of 2nd I.P. : $M g < S i < A l < P < S$

Correct order of electron affinity: $N < C < O < F$

Solution

Q.
Consider the following orders against the mentioned property:

I. $Mg < Si < Al < S < P$ (2nd ionisation potential)

II. ${Na}_{2} O < MgO < {Al}_{2} O_{3} < P_{2} O_{5}$ (Acidic strength)

III. $C < N < O < F$ (Electron affinity)

The incorrect order(s) is/are

1 Only I

2 Only III

3 Only I and III

4 I, II and III

Ans.
(3)

Hint: On moving left to right, acidic strength of oxide increases.

Correct order of 2nd I.P. : $M g < S i < A l < P < S$

Correct order of electron affinity: $N < C < O < F$

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