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Why are the following metals not used in...

Why are the following metals not used in the lab. Preparation of hydrogen?
iron

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Iron requires heating, as the reaction is slow at ordinary temperature. Also the hydrogen produced contains impurities like hydrogen sulphide and sulphur dioxide and hence, this is not preferred
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ICSE-STUDY OF THE FIRST ELEMENT - HYDROGEN-TOPIC 2 Properties of Hydrogen, Oxidation nd Reduction (5 MARKS QUESTIONS)
  1. Name : an oxidizing agent that does not contain oxygen.

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  2. Name a substance which oxidises conc. hydrochloric acid to chlorine.

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  3. Name a substance that will reduce aqueous Iron (III) ions to Iron (II...

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  4. Name : a liquid that is an oxidizing as well as a reducing agent.

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  5. Give one example of each A gaseous substance which acts as an oxidis...

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  6. Why are the following metals not used in the lab. Preparation of hydro...

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  7. Why are the following metals not used in the lab. Preparation of hydro...

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  8. Why are the following metals not used in the lab. Preparation of hydro...

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  9. Why are the following metals not used in the lab. Preparation of hydro...

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  10. How did the name 'hydrogen' originate?

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  11. What happens when following elements are made to react with hydrogen. ...

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  12. What happens when following elements are made to react with hydrogen. ...

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  13. What happens when following elements are made to react with hydrogen. ...

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  14. What happens when following elements are made to react with hydrogen. ...

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  15. State the product formed and write the balanced equation to show the r...

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  16. When hydrogen is passed over a black solid compound A, the products ar...

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  17. When hydrogen is passed over a black solid compound A, the products a...

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  18. When hydrogen is passed over a black solid compound A, the products ar...

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  19. When hydrogen is passed over a black solid compound A, the products ar...

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  20. When hydrogen is passed over a black solid compound A, the products a...

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