Advertisements
Advertisements
प्रश्न
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| 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 |
Advertisements
उत्तर
| a. | Photosynthesis | iii. | Chemical change |
| b. | Water | iv. | Covalent bond |
| c. | Sodium chloride | v. | Ionic bond |
| d. | Dissolution of salt in water | vi. | Physical change |
| e. | Carbon | ii. | Reactant in combustion process |
| f. | Fluorine | vii. | Tendency to form anion |
| g. | Magnesium | i. | Tendency to lose electrons |
संबंधित प्रश्न
How would you show that setting of curd is a chemical change?
How do the following help in bringing about a chemical change?
pressure.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Give a word equation for the following reaction.
Two gases which combine to give a solid.
Complete the table given below.
| Heat on sodium chloride | Colour imparted to flame during flame test |
Mention the various conditions required for a chemical reaction to occur.
A reaction between an acid and a base is called ______.
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.
