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प्रश्न
Complete the following statement.
On heating, hydrated copper sulphate changes its colour from ________ to __________.
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उत्तर
On heating, hydrated copper sulphate changes its colour from Blue to white.
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संबंधित प्रश्न
State the effect of an exothermic reaction on the surroundings.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Heat energy is evolved in these reactions
- Thermal decomposition reactions
- Exothermic reactions
- Endothermic reactions
- None of these
Name a carbonate which do not decompose on heating.
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 ________.
Give a balanced equation for the following type of reaction:
A catalytic, reversible, exothermic reaction.
Explain the term energy changes in a chemical change or reaction.
Complete the statement by filling in the blank with the correct word:
The reaction of hydrogen burning in oxygen to give a neutral liquid is an example of ________ reaction.
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.
Give a 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.
