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प्रश्न
Give an example of the following chemical changes.
A reaction involving blue solution.
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उत्तर
\[\ce{\underset{[iron]}{Fe} + \underset{[blue solution]}{CuSO4_{(aq)}} ->\underset{[green solution]}{FeSO4} + \underset{(brown/red deposit)}{\underset{[copper]}{Cu}}}\]
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संबंधित प्रश्न
Complete the following statement.
On heating, hydrated copper sulphate changes its colour from ________ to __________.
Define exothermic and endothermic changes. Give two example in each case.
State the following reaction whether heat is evolved or absorbed –
water is added to quicklime
State the following reaction whether heat is evolved or absorbed –
Two neutral gases combine to give a basic gas.
Complete the statement by filling in the blank with the correct word:
The element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a ________.
Write an Explanation.
Endothermic reaction
Give examples for the exothermic process.
Give scientific reasons.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reasons.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
