Single Choice

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

A$$\Delta H_{mixing} < 0(zero)$$
B$$\Delta H_{mixing} > 0(zero)$$
CA - B interaction is stronger than A - A and B - B interactions
DA - A, B - B and A - B interactions are identical
Correct Answer

Solution

The solutions which obey Raoult's law over the entire range of concentration are known as ideal solutions. The ideal solutions have two other important properties. The enthalpy of mixing of the pure components to form the solution is zero and the volume of mixing is also zero.

At a molecular level, ideal behaviour of the solutions can be explained by considering two components A and B. In pure components, the intermolecular attractive interactions will be of types A-A and B-B, whereas in the binary solutions in addition to these two interactions, A-B type of interactions will also be present. If the intermolecular attractive forces between the A-A and B-B are nearly equal to those between A-B, this leads to the formation of the ideal solution.

Hence, as the given solution is ideal, the correct option is $$(D)$$.

SIMILAR QUESTIONS

Solutions

Which of the following plot does not represent the behaviour of an ideal binary liquid solution of $$A$$ and $$B$$?

Solutions

An ideal binary solution is prepared by two liquids A and B, with p$$^o_A$$ > p$$^o_B$$. Then :

Solutions

For an ideal solution, the correct option is :

Solutions

Which one is not equal to zero for an ideal solution?

Solutions

Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is(are):

Solutions

The Poisson's ratio of a material is 0.4. If a force is applied to a wire of this material, there is a decrease of cross-sectional area by 2%. The percentage increase in its length is :

Solutions

What are the conditions for an ideal solution which obeys Raoult's law over the entire range of concentration?

Solutions

Formation of a solution from two components can be considered as: (i) Pure solvent $$\rightarrow$$ separated solvent molecules, $$\Delta H_1$$ (ii) Pure solvent $$\rightarrow$$ separated solute molecules, $$\Delta H_2$$ (ii) Separated solvent and solute molecules $$\rightarrow$$ solution, $$\Delta H_3$$ Solution so formed will be ideal if

Solutions

The composition of vapour when first bubble formed is:

Solutions

Which of the following is not correct for an ideal solution?

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