Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

Consider the following table :

a and b are van der Waals constants. The correct statement about the gases is :

  1. A

    Gas C will occupy lesser volume than gas A; gas B will be lesser compressible than gas D

  2. B

    Gas C will occupy more volume than gas A; gas B will be more compressible than gas D

  3. C

    Gas C will occupy lesser volume than gas A; gas B will be more compressible than gas D

  4. D

    Gas C will occupy more volume than gas A; gas B will be lesser compressible than gas D

Solution

If two gases have same value of ‘b’ but different values of ‘a’, then the gas having a larger value of ‘a’ will occupy lesser volume.

This is because the gas having larger value of “a” will have larger force of attraction and hence lesser distance between its molecules.

If two gases have same value of ‘a’ but different values of ‘b’, then the smaller value of ‘b’ will occupy lesser volume and hence will be more compressible.

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