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प्रश्न
Which metal gives hydrogen with all of the following: water, acids, alkalis?
पर्याय
Fe
Zn
Mg
Pb
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उत्तर
Zn
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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 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.
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.
Give a reason for the following.
Hydrogen is collected by the downward displacement of water and not of air, even though it is lighter than air.
Select the odd one out and justify your answer.
Fe, Zn, Cu and Mg
Choose terms from the options given in brackets to complete this sentence.
Sodium ………………. reacts smoothly with cold water.
(metal, amalgam, in the molten state)
State why hydrogen is not prepared in the laboratory by the action of calcium with dilute sulphuric acid.
‘Magnesium reacts with very dilute nitric acid at low temperatures liberating hydrogen.’ Give reasons.
Name the following.
A metal which cannot be used for the preparation of hydrogen using dilute acids.
