Advertisements
Advertisements
Question
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Advertisements
Solution
\[\ce{Fe + \underset{\text{Blue solution}}{CuSO4_(_a_q_)} ->\underset{\text{Green solution}}{FeSO4 + Cu}}\]
APPEARS IN
RELATED QUESTIONS
How do the following help in bringing about a chemical change?
heat.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
TRUE \ FALSE
Ammonia is a good oxidizing agent.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Define the following term:
Precipitate
Write the chemical reaction where the following changes are observed.
Gas is evolved
State the main characteristics of chemical reactions. Give at least one example in each case.
Explain the following statement: Digestion is a chemical change.
Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
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 |
