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प्रश्न
Give a chemical test to distinguish between the following gases.
H2 and O2
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. |
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संबंधित प्रश्न
Complete and balance the following chemical equations:
N2 + O2 →
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Differentiate between in Chemical reaction and chemical equation.
Fill in the blank:
The substances which undergo chemical change are called _______
A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
Write the chemical reaction where the following changes are observed.
Physical state is changed
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Give a word equation for the following reaction.
Two gases which combine to give a solid.
The changes in which new substance with new chemical properties are formed are ______.
______ change results in the change of the substance.
The percentage composition of Nitrogen in Ureas is ______.
The water we drink is a combination of hydrogen and oxygen.
Give an example of a chemical reaction for each of the following situations:
A change in colour is observed.
