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When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed that
- a)The match stick burns with an orange flame.
- b)The match stick extinguished and the gas burns with pop sound
- c)The match stick burns slowly with a blue flame
- d)The match stick continue to burn brilliantly
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
When a student added zinc granules to dilute HCl, a colour less and od...
Explanation: When Zinc is treated with dilute HCl, zinc being more reactive than hydrogen displaces hydrogen from its salt solution and thus produce zinc chloride and hydrogen gas.
This is a single replacement reaction as more reactive zinc displaces hydrogen. the hydrogen gas is odorless and colorless and burns with a pop sound when a burning match stick is brought near it.
Most Upvoted Answer
When a student added zinc granules to dilute HCl, a colour less and od...
When zinc reacts with HCl... displacement reaction takes place, as Zn being more reactive displaces hydrogen from HCl...hydrogen gas is released in the reaction which extinguishes a flame with pop sound
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When a student added zinc granules to dilute HCl, a colour less and od...
Answer:
Introduction:
When zinc granules are added to dilute hydrochloric acid (HCl), a colorless and odorless gas is evolved. To identify the gas, a burning matchstick is brought near it and the observations are made. Based on the given options, the correct answer is option 'B', which states that the matchstick extinguishes and the gas burns with a popping sound. Let's understand the reason behind this observation.
Explanation:
1. Reaction between zinc and hydrochloric acid:
When zinc (Zn) reacts with hydrochloric acid (HCl), a displacement reaction takes place. The zinc atoms displace the hydrogen atoms from the hydrochloric acid to form zinc chloride (ZnCl2) and hydrogen gas (H2). The balanced chemical equation for this reaction is as follows:
Zn + 2HCl -> ZnCl2 + H2
2. Properties of hydrogen gas:
Hydrogen gas is a colorless and odorless gas. It is highly flammable and burns in the presence of oxygen to produce water vapor. The flame produced by burning hydrogen gas is usually pale blue and almost invisible.
3. Observations with a burning matchstick:
When a burning matchstick is brought near the evolved gas, the following observations can be made:
a) The matchstick burns with an orange flame:
If the gas evolved was hydrogen gas, the matchstick would burn with an orange flame. This is because the heat produced by the burning matchstick would ignite the hydrogen gas, causing it to burn. However, this is not the observed result in this case.
b) The matchstick extinguished and the gas burns with a pop sound:
This is the correct observation mentioned in option 'B'. When the matchstick is brought near the evolved gas, the gas quickly extinguishes the burning matchstick. This indicates that the gas evolved is not hydrogen, as hydrogen itself is highly flammable. The popping sound is likely produced due to the combustion of the gas in the presence of oxygen.
c) The matchstick burns slowly with a blue flame:
If the gas evolved was hydrogen gas, the matchstick would burn slowly with a blue flame. However, this is not the observed result in this case.
d) The matchstick continues to burn brilliantly:
If the gas evolved was hydrogen gas, the matchstick would continue to burn brilliantly. However, this is not the observed result in this case.
Conclusion:
Based on the observations, it can be concluded that the gas evolved when zinc granules are added to dilute hydrochloric acid is not hydrogen gas. The gas extinguishes the burning matchstick and burns with a popping sound, indicating the presence of a different gas.
Introduction:
When zinc granules are added to dilute hydrochloric acid (HCl), a colorless and odorless gas is evolved. To identify the gas, a burning matchstick is brought near it and the observations are made. Based on the given options, the correct answer is option 'B', which states that the matchstick extinguishes and the gas burns with a popping sound. Let's understand the reason behind this observation.
Explanation:
1. Reaction between zinc and hydrochloric acid:
When zinc (Zn) reacts with hydrochloric acid (HCl), a displacement reaction takes place. The zinc atoms displace the hydrogen atoms from the hydrochloric acid to form zinc chloride (ZnCl2) and hydrogen gas (H2). The balanced chemical equation for this reaction is as follows:
Zn + 2HCl -> ZnCl2 + H2
2. Properties of hydrogen gas:
Hydrogen gas is a colorless and odorless gas. It is highly flammable and burns in the presence of oxygen to produce water vapor. The flame produced by burning hydrogen gas is usually pale blue and almost invisible.
3. Observations with a burning matchstick:
When a burning matchstick is brought near the evolved gas, the following observations can be made:
a) The matchstick burns with an orange flame:
If the gas evolved was hydrogen gas, the matchstick would burn with an orange flame. This is because the heat produced by the burning matchstick would ignite the hydrogen gas, causing it to burn. However, this is not the observed result in this case.
b) The matchstick extinguished and the gas burns with a pop sound:
This is the correct observation mentioned in option 'B'. When the matchstick is brought near the evolved gas, the gas quickly extinguishes the burning matchstick. This indicates that the gas evolved is not hydrogen, as hydrogen itself is highly flammable. The popping sound is likely produced due to the combustion of the gas in the presence of oxygen.
c) The matchstick burns slowly with a blue flame:
If the gas evolved was hydrogen gas, the matchstick would burn slowly with a blue flame. However, this is not the observed result in this case.
d) The matchstick continues to burn brilliantly:
If the gas evolved was hydrogen gas, the matchstick would continue to burn brilliantly. However, this is not the observed result in this case.
Conclusion:
Based on the observations, it can be concluded that the gas evolved when zinc granules are added to dilute hydrochloric acid is not hydrogen gas. The gas extinguishes the burning matchstick and burns with a popping sound, indicating the presence of a different gas.
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When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect answer is option 'B'. Can you explain this answer?
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When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect 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 When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect 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 When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect answer is option 'B'. Can you explain this answer?.
When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect 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 When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect 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 When a student added zinc granules to dilute HCl, a colour less and odourless gas was evolved, which was tested with a burning match stick it was observed thata)The match stick burns with an orange flame.b)The match stick extinguished and the gas burns with pop soundc)The match stick burns slowly with a blue flamed)The match stick continue to burn brilliantlyCorrect answer is option 'B'. Can you explain this answer?.
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