Chemical Change

IMPORTANT

Chemical Change: Overview

This topic covers concepts, such as, Characteristics of Chemical Change, Rusting, Chemical Change, Calcination & Roasting etc.

Important Questions on Chemical Change

EASY
IMPORTANT

Any system that is not at equilibrium

MEDIUM
IMPORTANT

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

MEDIUM
IMPORTANT

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

EASY
IMPORTANT

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

EASY
IMPORTANT

Which of the following types of metals undergo calcination?

A. Highly Reactive Metals 

B. Moderately Reactive Metals 

C. Least Reactive Metals

EASY
IMPORTANT

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.

EASY
IMPORTANT

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

EASY
IMPORTANT

Which of the following metals do/does NOT undergo the process of calcination?

A. Zinc 

B. Iron 

C. Magnesium

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

EASY
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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

EASY
IMPORTANT

Which of the following statements are NOT true?

A. Roasting is a process of oxidation.

B. Roasting is a process of reduction.

EASY
IMPORTANT

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

EASY
IMPORTANT

Which of the following metals can be extracted using roasting?

A. Zinc 

B. Iron 

C. Mercury

EASY
IMPORTANT

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.

EASY
IMPORTANT

Which of the following statements is NOT correct?

HARD
IMPORTANT

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?