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(a). Assertion (A) is true, Reason (R) i...

(a). Assertion (A) is true, Reason (R) is also true, Reason (R) is the correct explanation for assertion (A).
(b). Assertion (A) is true, Reason (R) is true, Reason (R) is not the correct explanation for Assertion (A).
(c). Assertion (A) is true, Reason (R) is false.
(d). Assertion (A) is false, Reason (R) is true.
Q. Assertion (A): to a solution of potassium chromate, if a strong acid is added, it changes its colour from yellow to orange.
Reason (R): The colour change is due to the change in oxidation state of potassium chromate.

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The correct Answer is:
To solve the question, we need to analyze the assertion and reason provided, and determine their truth values and relationship. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states: "To a solution of potassium chromate, if a strong acid is added, it changes its colour from yellow to orange." - Potassium chromate (K2CrO4) is known to be yellow in color. When a strong acid is added, it converts to potassium dichromate (K2Cr2O7), which is orange in color. Therefore, this assertion is **true**. 2. **Understanding the Reason (R)**: - The reason states: "The colour change is due to the change in oxidation state of potassium chromate." - In potassium chromate, chromium is in the +6 oxidation state. When it converts to potassium dichromate, the oxidation state of chromium remains +6. Thus, there is **no change** in the oxidation state of chromium during this process. Therefore, this reason is **false**. 3. **Conclusion**: - Since the assertion is true and the reason is false, we can conclude: - Assertion (A) is true. - Reason (R) is false. - Thus, the correct answer is **(c)**: Assertion (A) is true, Reason (R) is false. ### Final Answer: (c). Assertion (A) is true, Reason (R) is false.
To solve the question, we need to analyze the assertion and reason provided, and determine their truth values and relationship. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states: "To a solution of potassium chromate, if a strong acid is added, it changes its colour from yellow to orange." - Potassium chromate (K2CrO4) is known to be yellow in color. When a strong acid is added, it converts to potassium dichromate (K2Cr2O7), which is orange in color. Therefore, this assertion is **true**. ...
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