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Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.


Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atoms

  • a)
    Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

  • b)
    Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

  • c)
    Assertion (A) is true but reason (R) is false.

  • d)
    Assertion (A) is false but reason (R) is true.

Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Assertion (A): When zinc is added to dilute hydrochloric acid, hydroge...
The metal zinc readily reacts with  hydrochloric acid to produce hydrogen ga s (H )  and zinc chloride (ZnCl ).


The reaction is given below:


Zn + 2HCl → ZnCl + H 2






Also,


Hydrochloric acid molecules contain chloride and hydroxide ions .  


 


Thus,



  • Assertion is true

  • Reasoning is true

  • And Reasoning is not the correct explanation of Assertion

This question is part of UPSC exam. View all Class 10 courses
Most Upvoted Answer
Assertion (A): When zinc is added to dilute hydrochloric acid, hydroge...
Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.

Reason (R): Hydrochloric acid molecules contain chloride and hydroxide ions.

The correct answer is option 'B' - Assertion (A) is true but reason (R) is false.

Explanation:
- Assertion (A) is true because when zinc is added to dilute hydrochloric acid, a chemical reaction occurs that results in the formation of hydrogen gas.
- Reason (R) is false because hydrochloric acid molecules do not contain hydroxide ions. Hydrochloric acid (HCl) is a strong acid that dissociates in water to form hydrogen ions (H+) and chloride ions (Cl-), not hydroxide ions (OH-).
- The reaction between zinc and hydrochloric acid can be represented by the following equation: Zn + 2HCl → ZnCl2 + H2.
- In this reaction, zinc (Zn) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2) is given off as a product.
- The reaction is a redox reaction where zinc is oxidized to zinc ions (Zn2+) and hydrogen ions (H+) from hydrochloric acid are reduced to hydrogen gas (H2).
Community Answer
Assertion (A): When zinc is added to dilute hydrochloric acid, hydroge...
Regarding the reason, in the test it is stated that hydrogen chloride molecules contain hydroxide and chloride ions...but you have typed hydrochloric acid and hydrogen atoms...so I would just request to clarify the fact because hydrogen chloride can't contain hydrochloric acid because both are the names of same thing
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Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atomsa)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?
Question Description
Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atomsa)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atomsa)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atomsa)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?.
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