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प्रश्न
Give a reason why a catalyst is used in certain chemical reactions.
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उत्तर
A catalyst is used to make the reaction fast or slow down it. When KClO3 is heated, oxygen is produced but the reaction is very slow. If we add MnO2 to KClO3 and heat the rate of production of oxygen becomes faster.
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संबंधित प्रश्न
What do you observe when Blue litmus paper is dipped in dilute hydrochloric acid.
Give two examples of oxides.
Acidic oxide.
Give two examples of oxides.
Amphoteric oxide
A chemical reaction may be ‘reversible’ in nature. State the meaning of the term in italics.
Certain thermal decomposition reaction, resulting in the formation of the oxide. Give a balanced equation for the thermal decomposition of the following, which result in the formation of metallic oxide.
Lead carbonate
\[\ce{PbCO3->[\Delta]PbO + CO2}\]
Certain thermal decomposition reaction, resulting in the formation of the oxide. Give a balanced equation for the thermal decomposition of the following, which result in the formation of metallic oxide.
Calcium hydroxide
\[\ce{Ca[OH]2->[\Delta]CaO + H2O}\]
State the meaning of the term ‘oxide’.
Give the example of the acidic oxide, basic oxide, amphoteric oxide and neutral oxide. State which of the oxide react with water to give a base.
Give the example of the acidic oxide, basic oxide, amphoteric oxide and neutral oxide. State which of the oxide react with a base to give salt and water.
Differentiate between the following:
An acidic oxide and a basic oxide.
