Advertisements
Advertisements
Question
Give a chemical test to distinguish between the following gases.
H2 and O2
Advertisements
Solution
| Hydrogen | Oxygen |
| Apply a burning splint to the gas: Pure hydrogen burns with a pale blue Flame when a burning splint is brought near it. | Apply a burning splint to the gas: It rekindles a glowing wooden splinter. |
APPEARS IN
RELATED QUESTIONS
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
TRUE \ FALSE
Copper can displace iron from iron sulphate.
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
State the conditions necessary for a chemical change or reaction.
Give an example of a photochemical reaction.
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
Mention the various conditions required for a chemical reaction to occur.
Write the characteristics of chemical change.
