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प्रश्न
Helium is preferred to hydrogen for filling balloons because it is:
पर्याय
lighter than air
almost as light as hydrogen
non-combustible
inflammable
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उत्तर
non-combustible
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संबंधित प्रश्न
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from hot water.
From the knowledge of activity series, name a metal which shows the following properties:
It displaces hydrogen from dilute HCl.
From the knowledge of activity series, name a metal which shows the following properties:
It forms a base which is insoluble in water.
Hydrogen can be prepared with the metal zinc by using:
acid
Give an equation.
Hydrogen can be prepared with the metal zinc by using: alkali
Give an equation.
Thin strips of magnesium, copper, and iron are taken.
Write down what happens when these metals are treated as follows:
- Heated in presence of air
- Heated with dil.HCl
- Added to an aqueous solution of zinc sulphate.
Which metal is preferred for collecting hydrogen from:
Write the balanced equation
Hot water
Select the odd one out and justify your answer.
Zn, Fe, Mg, and Na
Give a chemical test to distinguish between the following gases:
Hydrogen chloride and hydrogen sulphide
‘Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.’ Give reasons.
