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प्रश्न
Helium is preferred to hydrogen for filling balloons because it is:
विकल्प
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 forms a base which is insoluble in water.
Thin strips of magnesium, copper, and iron are taken.
Arrange these metals in descending order of reactivity.
Hydrogen is obtained by displacement from:
- dilute sulphuric acid
- dilute hydrochloric acid
Write equations using zinc and iron.
Why does copper not show similar behavior?
Give reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
Name two alkalies that can displace hydrogen. Give balanced equations for the same. Why are the metals you have used considered to have a unique nature?
What do you observe when hydrogen gas is passed through a soap solution?
Select the odd one out and justify your answer.
Fe, Pb, Al and Zn
Which metal gives hydrogen with all of the following: water, acids, alkalis?
Which of the following metals does not give hydrogen with acids?
Name the following.
A metal which cannot be used for the preparation of hydrogen using dilute acids.
