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प्रश्न
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
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उत्तर
2Mg + O2 → 2MgO => Combination reaction.
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संबंधित प्रश्न
Fill in the blank
A new substance is always formed in a _______ change.
Differentiate between in Chemical reaction and chemical equation.
Write true or false .
A black residue is formed when sugar is heated .
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
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| 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 |
State the conditions necessary for a chemical change or reaction.
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A reaction where colour change is noticed.
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| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
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Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
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Give an example of a chemical reaction for the following situation:
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