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प्रश्न
What do you observe? When
Water is added to the quick lime.
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उत्तर
Quick lime reacts vigorously with water to produce slaked lime, i.e. calcium hydroxide.
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संबंधित प्रश्न
What are oxides ?
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Give an example of a reaction where the following are involved
Pressure
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Write a word equation for the chemical change, if any.
Write a note on the following:
Curdling of milk
What is the difference between reactants and products?
