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प्रश्न
Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
पर्याय
magnesium
aluminium
calcium
iron
उत्तर
calcium
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संबंधित प्रश्न
Fill in the blank
Hydrogen is ..................... than air.
Fill in the blank
Hydrogen is ...................soluble in water.
Which metal is preferred for the preparation of hydrogen?
from water?
Which metal is preferred for the preparation of hydrogen?
from acid?
Give reason for the following:
The end of the thistle funnel should be dipped under acid.
Complete and balance the following reaction.
Na + H2O →_____________ +___________
Starting from hydrogen gas how would you obtain a basic gas.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Sodium - 2Na + 2H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
Account for the following fact:
Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilutes sulphuric acid.
