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What do you observe when hydrogen gas is...

What do you observe when hydrogen gas is passed through soap solution ?

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When hydrogen gas is passed through a soap solution soap bubbles filled with hydrogen fly high in the air and burst. This action proves that hydrogen is lighter than air.
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ICSE-STUDY OF THE FIRST ELEMENT - HYDROGEN-TOPIC 2 Properties of Hydrogen, Oxidation nd Reduction (1 MARK QUESTIONS)
  1. Metals like , and give H2 with steam. (iron, magnesium, aluminium, ...

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  2. A metal.. hydrogen in the activity series gives hydrogen with ...........

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  3. By increasing the pressure on the volume of an enclosed gas at constan...

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  4. Helium is preferred to hydrogen for filling balloons because it is :

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  5. Reacting with water, an active metal produces

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  6. Name the following A metal oxide that can be reduced by hydrogen.

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  7. For the reaction PbO + H2 to Pb + H2 O, which of the following stateme...

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  8. Which of the following metals does not liberate hydrogen from acids?

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  9. Select the odd one out and justify your answer. Zn, Fe, Mg and Na

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  10. Select the odd one out and justify your answer. SO2, H2 S, NH3 and C...

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  11. Select odd one and justify your answer : Mg, Zn, Fe, Cu

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  12. Select the odd one out and justify your answer Fe , Pb , Al and Zn

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  13. State whether the following conversions are oxidation or reduction rea...

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  14. State whether the following conversions are oxidation or reduction rea...

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  15. What do you observe when hydrogen gas is passed through soap solution ...

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  16. Concentrated sulphuric acid is not used to dry hydrogen.

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  17. State whether the compounds shown in bold letters are oxidised or red...

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  18. Give reason: For welding of two metallic pieces, an oxyhydrogen flame ...

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  19. Give reasons : Hydrogen is not used in balloons inspite of being the...

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  20. Name : a solid that is an oxidizing agent.

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