Advertisements
Advertisements
प्रश्न
Give a chemical test to distinguish between the following gases.
H2 and O2
Advertisements
उत्तर
| 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
संबंधित प्रश्न
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Copper carbonate when heated, it turns :
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Distinguish by dilute sulphuric acid.
Copper and magnesium?
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
Write word equations for two chemical reactions with the help of materials given in the box.
| Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water |
