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प्रश्न
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
उत्तर
The conversion of ferrous sulphate to ferric sulphate is an oxidation reaction.
Explanation:
Oxidation means losing one or more electrons. During this conversion, Fe2+ is converted into Fe3+ by losing one electron. Therefore, it is an oxidation reaction.
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संबंधित प्रश्न
Explain the following reaction with one suitable example of Combination reactions .
Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Multiple choice:
Thermal decomposition of sodium carbonate will produce
What is a chemical change? Give two examples of chemical change?
Define:
Electrochemical reaction
Give one example
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute hydrochloric acid to silver nitrate.
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II | ||
| 1. | \[\ce{XY⇌[heat]X + Y}\] | A: | Displacement reaction |
| 2. | \[\ce{XY->X + Y}\] | B: | Double decomposition |
| 3. | \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] | C: | Endothermic reaction |
| 4. | \[\ce{X + YZ->XZ + Y}\] | D: | Thermal dissociation |
| 5. | \[\ce{X + Y->[heat]XY -\Delta}\] | E: | Decomposition reaction |
Give a suitable example with an equation to show the representation of a chemical reaction.
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
______ gas causes tears in our eyes while cutting onions.
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Analogy:
H2O: Water:: NaCl: ______.
Which of the following statement is incorrect for a chemical reaction?
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
Rusting of iron is ______.
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.
