Chemistry
Assertion (A): Gases diffuse easily and form homogeneous mixtures.
Reason (R): Molecules of other substances occupy the intermolecular spaces present in gases.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
Both A and R are true and R is the correct explanation of A.
Explanation— Gases have a natural tendency to mix with one another i.e., they diffuse easily and form homogeneous mixtures. Hence, the assertion (A) is true.
Inter-particle (inter-molecular) spaces in a gas are very large. When two gases are brought in contact with each other, their molecules mix with each other in such a manner that a homogeneous gaseous mixture is formed. Hence, the reason (R) is true and it is the correct explanation of assertion (A).
Related Questions
Assertion (A): The volumes of gases are first converted into STP conditions and then compared.
Reason (R): Volume does not vary with temperature and pressure in gases.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): When stating the volume of a gas, the pressure and temperature should also be given.
Reason (R): The volume of a gas is inversely proportional to temperature and directly proportional to pressure.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): At zero Kelvin (-273°C), the volume occupied by a gas is considered as zero.
Reason (R): Theoretically, molecular motion completely ceases at zero Kelvin.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): For a given amount of any gas, the product PV is always constant.
Reason (R): Pressure is inversely proportional to volume at constant temperature.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.