Chemistry
Assertion (A): Water exists in all the three states of matter.
Reason (R): On cooling, liquid water changes into ice, the solid state. On heating, it changes into vapour, the gaseous state.
- 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.
Water
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Water can exist as a solid (ice), liquid (water), and gas (vapour) under different conditions of temperature and pressure.
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Related Questions
Temporary hardness of water can be removed by
- filtering
- boiling
- loading
- none of the above
Assertion (A): Water is a universal solvent.
Reason (R): We use water daily for drinking, washing, bathing, etc.
- 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): Miscible liquids dissolve into each other.
Reason (R): Petrol and water are miscible liquids.
- 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): A solution is a heterogeneous mixture of two or more substances with variable composition.
Reason (R): The component of a solution that dissolves is called as solute, while the other component in which the solute dissolves is called a solvent.
- 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.