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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.
What do you observe when Lead nitrate is heated.
Give two examples of oxides.
Neutral 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.
Limestone
\[\ce{CaCO3->[\Delta]CaO + CO2}\]
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.
Lead carbonate
\[\ce{PbCO3->[\Delta]PbO + CO2}\]
Give a balanced equation for the formation of the following oxide –
Zinc oxide from a metal
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 one example of –
A peroxide
Select the correct answer for the statement given below:
The neutral gas obtained on thermal decomposition of potassium nitrate.
