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A : Aq solution of washing soda is alkal...

A : Aq solution of washing soda is alkaline in nature
R : It is salt of weak acid and strong base.

A

If both Assertion & Reason are true and the reason is the correct explanantion of the assertion, then mark (1).

B

If both Assertion & Reason are true and the reason is not the correct explanantion of the assertion, then mark (2).

C

If Assertion is true statement but Reason is false. Them mark (3).

D

If both Assertion and reason are false statement, then mark (4).

Text Solution

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The correct Answer is:
To analyze the assertion and reason provided in the question, we can break it down step by step: ### Step 1: Understanding the Assertion The assertion states that an aqueous solution of washing soda is alkaline in nature. **Explanation:** - Washing soda is chemically known as sodium carbonate, with the formula Na2CO3. - When Na2CO3 is dissolved in water, it dissociates into sodium ions (Na⁺) and carbonate ions (CO₃²⁻). ### Step 2: Understanding the Reason The reason given is that washing soda is a salt of a weak acid and a strong base. **Explanation:** - Sodium carbonate (Na2CO3) is formed from the reaction of sodium hydroxide (NaOH), which is a strong base, and carbonic acid (H2CO3), which is a weak acid. - The carbonate ion (CO₃²⁻) can react with water to form bicarbonate (HCO₃⁻) and hydroxide ions (OH⁻), which increases the pH of the solution, making it alkaline. ### Step 3: Conclusion Since both the assertion and the reason are true, and the reason correctly explains why the assertion is true, we can conclude that: - **Assertion (A)**: True - Aqueous solution of washing soda is alkaline in nature. - **Reason (R)**: True - It is a salt of a weak acid and a strong base. ### Final Answer: Both the assertion and the reason are true, and the reason is the correct explanation for the assertion. ---
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AAKASH INSTITUTE ENGLISH- ALCOHOLS, PHENOLS AND ETHERS-Assignment Section -D (Assertion - reason type question)
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  4. A : When 3,3-dimethyl butan - 2 - ol is heated in presence of concentr...

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  5. A : In esterification reaction , HCOOH is the most reactive acid among...

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  6. A : Ethers can't be distilled upto dryness due to fear of explosion . ...

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  7. Phenol is less acidic than........... .

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  8. A : CH(3) - underset(O)underset(||)(C)-COOH gives haloform reaction ...

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  9. A : Diphenyl ether is prepared by Williamson synthesis . R : This...

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  10. A : Grignard's reagent is prepared in the presence of ether . R :...

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  11. A : CH(3) - underset(CH(3))underset(|)overset(CH(3))overset(|)(C)-CH=...

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  12. A : Two moles of Grignard reagent is consumed in the formation of ter...

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  13. A : bond angle in ether is slightly greater than normal tetrahedral an...

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  14. A : CH(3)-underset(CH(3))underset(|)overset(CH(3))overset(|)(C)-O-CH...

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  15. A : Ortho - cresol is weaker acidic than meta-cresol . R : It is d...

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  16. A : Among all ortho halophenol , fluorophenol is least acidic . R ...

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  17. A : In esterification reaction alcohol act as nucleophile . R : ...

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  18. A : Phenol is manufactured by Dow 's pocess. R : It involves the ...

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  19. A : Primary alcohol is prepared by the reaction of primary amine with ...

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  20. A : The reactivity order of alcohols is 1^(@) gt 2^(@) gt 3^(@) for ...

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  21. A : The dehydration of ethyl alcohol in presence of Al(2)O(3) at 633 ...

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