Advertisements
Advertisements
Question
Give a reason why a catalyst is used in certain chemical reactions.
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Fill in the blank .
Soluble bases are called ............
What do you observe when Blue litmus paper is dipped in dilute hydrochloric acid.
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.
Calcium nitrate
\[\ce{2Ca[NO3]2->[\Delta]2CaO + 4NO2 + O2}\]
Give a balanced equation for the formation of the following oxide –
Sulphur dioxide from a non-metal
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 mixed oxide
