JEE Main 2014 · 19 Apr · Shift 1 · Chemistry Q40

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ChemistrySingle correct+4 / -1Question 40 of 90

For an ideal solution of two components A and B, which of the following is true ?

\Delta H_{\text{mixing}}<0

(zero)

\Delta H_{\text{mixing}}>0

(zero)

A − B interaction is stronger than A − A and B − B interactions

A − A, B − B and A − B interactions are identical

Answer and worked solution

Official answer: D

In an ideal solution the A-B interactions equal the A-A and B-B interactions, so $\Delta H_{mix}=0$ and $\Delta V_{mix}=0$ . The first two options say $<0$ and $>0$ ; only (4) is right.

Topics:Ideal and non-ideal solutions

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JEE Main 2014 · 19 Apr · Shift 1, Chemistry question 40