Chemical Change
Chemical Change: Overview
This topic covers concepts, such as, Characteristics of Chemical Change, Rusting, Chemical Change, Calcination & Roasting etc.
Important Questions on Chemical Change
Any system that is not at equilibrium

Which of the following is not an example of a chemical change?

Which of the following is not a property of chemical change?

Which of these is an example of chemical change taking place in our daily life?

Which of the following types of metals undergo calcination?
A. Highly Reactive Metals
B. Moderately Reactive Metals
C. Least Reactive Metals

Which of the following statements are NOT true?
I. Calcination is a process of reduction.
II. The process of calcination is followed by reduction process.

Calcination is the process of changing carbonate ores into oxides by __________.

Which of the following metals do/does NOT undergo the process of calcination?
A. Zinc
B. Iron
C. Magnesium

Calcination is the process of conversion of __________ ores into oxides.

The metal oxides obtained from roasting are then reduced to corresponding metals by using reducing agents like carbon or using displacement reactions with which of the following metals?
A. Sodium
B. Calcium
C. Mercury

Which of the following statements are NOT true?
A. Roasting is a process of oxidation.
B. Roasting is a process of reduction.

In roasting, the ore is heated in a regular supply of air in a furnace at a temperature _____.

Which of the following metals can be extracted using roasting?
A. Zinc
B. Iron
C. Mercury

Which of the following two statements are correct?
A. Roasting is the process of extraction of highly reactive metals.
B. Roasting involves conversion of sulphide ores into oxides.

Which of the following statements is NOT correct?

Beauty of some historical monuments is greatly affected by the growth of certain living organisms. These living organisms belong to which one of the following groups?
