Chemistry
Assertion (A): Pure water is tasteless but the water which we drink has taste.
Reason (R): Drinking water contains dissolved minerals and 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.
Water
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Pure water is tasteless, but the water we drink usually has a slight taste. So, Assertion (A) is true.
Drinking water contains dissolved minerals (salts like calcium and magnesium compounds) and dissolved gases, which impart taste to the water. So, Reason (R) is true.
Therefore, both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
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Related Questions
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.
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- A is true but R is false.
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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.
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Assertion (A): Hard water does not form lather with soap easily.
Reason (R): Temporary hardness can be removed by boiling.
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Fill in the blanks:
(a) Water has ………………… density and …………….. volume at 4°C.
(b) Freezing mixture contains ……………… and ……………. .
(c) The solubility of a gas in water …………….. with rise in temperature and ………………….. with rise in pressure.
(d) ………………. is the purest form of natural water.
(e) Use of excessive ……………… by farmers causes water pollution.
(f) Boiling removes the ………………. hardness of water.
(g) Water turns the colour of anhydrous copper sulphate ………………. .
(h) The sticky substance formed when soap is added to hard water is …………………. .