Consider the following statements.
1. Reactions in which heat is released and the formation of products are called exothermic chemical reactions.
2. Reactions in which energy is absorbed are known as endothermic reactions.
Which of the statements given above is/are correct?
1. Reactions in which heat is released and the formation of products are called exothermic chemical reactions.
2. Reactions in which energy is absorbed are known as endothermic reactions.
Which of the statements given above is/are correct?
Important Questions on Chemical Reactions and Equations
Consider the following statements regarding electrolysis:
1. Electrolysis is carried out in an electrolytic cell.
2. Aluminium is produced by the electrolysis of molten aluminium oxide in the presence of cryolite. Therefore, electrolysis is very useful in the extraction of metals.
Which of the statements given above is/are correct?
Consider the following statements regarding corrosion:
. Surface of copper acquires a green coating of basic copper carbonate in moist air.
. The rusting of iron can be prevented by painting, oiling and greasing, coating iron objects with zinc and chrome plating etc.
Which of the statements given above is/are correct regarding corrosion?
Consider the following statements regarding enzyme catalysis:
1. The rates of enzymatic reactions are very much affected by pH change.
2. Enzyme catalysts are not specific in their reactions.
Which of the statements given above is/are incorrect?
Which of the following statements is/are true?
1. Pure water does not conduct electricity because it is almost unionised.
2. When iron rusts, its weight increases.
3. A chemical reaction becomes faster at a higher temperature.
4. At higher temperatures, molecular motion becomes more rapid.
Choose the correct option:
