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NCERT 7th Class (CBSE) Science: Chemical and Chemical Changes – Quiz
28 Multiple Choice Questions related to NCERT 7th Class (CBSE) Science: Chemical and Chemical Changes – Quiz:
- Physical Change: A physical change is a change in which no new substance is formed.
- Chemical Change: Those changes in which new substances are formed, are called chemical changes
- Crystallization: The method of separation of pure crystals of a substance from its hot and super saturated solution on cooling is called crystallization
Quiz: Chemical and Chemical Changes
Physical change is a change in which no new substance are formed. In a physical change, the substance involved do not change their identity. Physical change can be easily reversed. Some common examples of physical change are: melting of ice, freezing of water.
- Question 1 of 28
1.
Manu dropped a horseshoe made of iron into a copper sulphate solution. After sometime he found that the horseshoe had a brown deposit on it. This was due to the formation of _____________
Correct
Wrong! Correct Answer is Iron Sulphate
- Question 2 of 28
2.
A change in which the composition of a substance changes is called _______
Correct
Wrong! Correct Answer is Chemical Change
- Question 3 of 28
3.
A change in which a substance undergoes changes in its physical properties is called___________
Correct
Wrong! Correct Answer is Physical Change
- Question 4 of 28
4.
When carbon dioxide is passed through lime water , then lime water becomes________
Correct
Wrong! Correct Answer is Milky
- Question 5 of 28
5.
Brown colour of the apple after cutting is___________
Correct
Wrong! Correct Answer is Chemical Change
- Question 6 of 28
6.
Ozone layer protects us from harmful_____________
Correct
Wrong! Correct Answer is Ultraviolet radiation
- Question 7 of 28
7.
The process of depositing a layer of one metal over another metal surface to protect it from rusting is called____________
Correct
Wrong! Correct Answer is Galvanisation
- Question 8 of 28
8.
For protecting iron pipes from corrosion, they are coated with_____________
Correct
Wrong! Correct Answer is Zinc
- Question 9 of 28
9.
Metal that is made by mixing iron with carbon, nickel and manganese is called
Correct
Wrong! Correct Answer is Stainless Steel
- Question 10 of 28
10.
The process of obtaining Salt by the evaporation of sea water is called
Correct
Wrong! Correct Answer is Crystallisation
- Question 11 of 28
11.
Blue colour of the copper sulphate solution changes to Green colour when an iron nail is dropped into it due to the formation of_________
Correct
Wrong! Correct Answer is Iron Sulphate
- Question 12 of 28
12.
When Magnesium ribbon is burnt in oxygen, the product obtained is_______
Correct
Wrong! Correct Answer is Magnesium oxide
- Question 13 of 28
13.
When Magnesium ribbon is burnt in candle flame it burns with
Correct
Wrong! Correct Answer is Brilliant white light
- Question 14 of 28
14.
The layer of rust is actually deposit of ________
Correct
Wrong! Correct Answer is Iron oxide
- Question 15 of 28
15.
Which of the following is not a chemical change?
Correct
Wrong! Correct Answer is Melting of ice
- Question 16 of 28
16.
Which of the following is not a physical change?
Correct
Wrong! Correct Answer is Digestion of food
- Question 17 of 28
17.
Which of the following is a chemical change?
Correct
Wrong! Correct Answer is Burning of candle
- Question 18 of 28
18.
Which of the following is a physical change?
Correct
Wrong! Correct Answer is Glowing of an electric bulb
- Question 19 of 28
19.
In which type of change a new substance is formed?
Correct
Wrong! Correct Answer is Chemical Change
- Question 20 of 28
20.
In physical change
Correct
Wrong! Correct Answer is All of the above
- Question 21 of 28
21.
In Chemical Change:
Correct
Wrong! Correct Answer is All of the above
- Question 22 of 28
22.
Which of the following is a physical change?
Correct
Wrong! Correct Answer is All of the above
- Question 23 of 28
23.
Which of the following is a chemical change?
Correct
Wrong! Correct Answer is All of the above
- Question 24 of 28
24.
Which of the following is not a chemical change?
Correct
Wrong! Correct Answer is Inflating a balloon
- Question 25 of 28
25.
Iron forms rust when it reacts with
Correct
Wrong! Correct Answer is Oxygen and moisture (water)
- Question 26 of 28
26.
The number of atoms that make up a molecule of an element is called ________
Correct
Wrong! Correct Answer is Atomicity
- Question 27 of 28
27.
The symbolic representation of the composition of a chemical compound is called_________
Correct
Wrong! Correct Answer is Chemical Formula
- Question 28 of 28
28.
The chemical substances that participate in a chemical reaction are called________
Correct
Wrong! Correct Answer is Reactants
I need more model questions in Science.
Please upload Chemical Chemicals Changes chapter worksheet and question paper.