Advertisements
Advertisements
प्रश्न
Define the following term:
Chemical change
Advertisements
उत्तर
A chemical change is a permanent change in which the chemical composition of a substance is changed and one or more new substances with different chemical compositions and different properties are formed.
APPEARS IN
संबंधित प्रश्न
What are biocatalysts ?
Explain the following reaction with one suitable example of Displacement reaction.
Give an example of a photochemical reaction.
What do you observe when CO2 is passed through lime water first and then a little in excess.
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Explain the term chemical reaction with special reference to reactants and products.
______ is not a chemical change.
Burning of paper is a ______ change.
Water boiling into water vapour is an example of chemical change.
Write word equations for two chemical reactions with the help of materials given in the box.
| Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water |
