Advertisements
Advertisements
प्रश्न
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
Advertisements
उत्तर
Divalent active metal Ca :
Ca + 2H2O → Ca[OH]2 + H2
APPEARS IN
संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
Give reason for the following:
A pop sound produced when hydrogen is burnt?
MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
FILL IN THE BLANK
The compounds of carbon and hydrogen are called .................
Why is hydrogen called a reducing agent? Give chemical equation to support your answer ?
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with steam
Give the balanced equation of the reaction.
Choose the correct option:
The composition of the nucleus of deuterium is
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen is a combustible gas.
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen does not support combustion.
Give balanced equation for the following conversion:
Iron [III] oxide to iron – using hydrogen.
Give a chemical test to distinguish between the following gases:
Hydrogen and oxygen
How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
Name a gas which burns in air or oxygen forming water.
What do you observe when a piece of sodium is dropped into cold water?
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
What do the following symbols represent : 2H and H2.
Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
