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प्रश्न
Define the following term:
Chemical change
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उत्तर
A chemical change is a permanent change in which the chemical composition of a substance is changed and one or more new substances with different chemical compositions and different properties are formed.
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
Fill in the blank.
Melting of ice is a _______ change.
Fill in the blank:
The substances which undergo chemical change are called _______
Give an example of a reaction where the following are involved:
Solution
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What do you observe? When
Barium chloride is added to sodium sulphate solution
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
