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प्रश्न
Define an electrochemical reaction.
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उत्तर
An electrochemical reaction is a chemical reaction involving the transfer of electrons, where oxidation and reduction occur simultaneously.
संबंधित प्रश्न
What do you observe when Iron nail is kept in copper sulphate solution for sometime.
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Name: A brown gas
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Calcium hydroxide.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Iron and rust are the same substances.
Match the following:
| Column I | Column II | ||
| 1. | Burning of coal | a. | Rusting |
| 2. | Painting of a surface | b. | Evaporation |
| 3. | Dipping iron in the water | c. | Chemical change |
| 4. | Salt from seawater | d. | Prevention of rusting |
