Chemistry
Assertion (A): Matter exists in three states; i.e. solids, liquids and gases.
Reason (R): The intermolecular forces of attraction and intermolecular spaces are different in different kinds of matter.
- 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 — The three states of matter exist because the intermolecular forces and spaces between particles vary — strong intermolecular forces and lesser intermolecular space in solids, weaker intermolecular forces and more intermolecular space in liquids, and very weak intermolecular forces with large intermolecular spaces in gases.
Related Questions
The type of energy possessed by a moving body is called as:
- Electrical energy
- Light energy
- Heat energy
- Kinetic energy
What happens to the kinetic energy when a solid substance is heated?
- Increases
- Decreases
- No change
- May increase or decrease
Assertion (A): Liquid molecules can move freely and are able to occupy the whole space available to them.
Reason (R): The molecules of liquids have larger intermolecular spaces and weaker intermolecular forces of attraction than those in solids.
- 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): Naphthalene balls become smaller with the passage of time, as they sublime.
Reason (R): Naphthalene balls sublime, as such solids have stronger intermolecular forces of attraction in comparison to other solids.
- 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.