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Class 8 Science HOTS Questions - Materials : Metals and Non-metals (Old Syllabus)

Q1. Of these, the most ductile metal is ___________.

1. Al
 2. Au
 3. Cu
 4. Ag 

Most Ductile MetalMost Ductile Metal

Q2. Which oxide of a metal gets reduced only by coke and not by H2 gas or CO gas?

1. Fe2O3

2. PbO

3. ZnO

4. CuO    

Q3. Which of the following metals is extracted only by electrolysis?

1. Zn

2. Al

3. Fe

4. Cu        

Q4. The metal reacting readily with cold water is ___________.

1. Au

2. Ag

3. Na

4. Mg     

Q5.Which of the following metals does not displace H2 gas from dilute HCl or dilute H2SO4?

1. Mg

2. Cu

3. Zn

4. Al

Q6. The property of metals by which they can be beaten in to thin sheets is called-

a. malleability

b. Ductility

c. conduction

d. Expansion

Q7. Which one of the following is metal?

a. C

b. N

c. Na

d. O

Q8. Which one of the following is non metal?

a. Zn

b. Al

c. Fe

d. N

Q9. All materials shown property of malleability expect

a. Iron

b. Graphite

c. Aluminium

d. Silver

Q10. Which one of the following is a good conductor of electricity?

a. Iron

b. Plastic

c. Wood

d. Glass

Q11. The property of metal by which it can be drawn into wires is called

a. Conductivity

b. malleability

c. Ductility

d. Decorating

Q12. The metals that produce ringing sounds, are said to be-

a. malleable

b. sonorous

c. Lustrous

d. hard

Q13. Which metal is found in liquid state t room temperature?

a. Fe

b. Zn

c. Hg

d. Al

Q14. The solution of ash of magnesium ribbon is-

a. Acidic

b. Basic

c. Neutral

d. All of these

Q15. What is the product when sulphur reacts with oxygen?

a. Sulphuric acid

b. Sulphur trioxide

c. Sulphurous acid

d. Sulphur dioxide

Q16. Which one of the following metal reacts vigorously with oxygen and water?

a. Sodium

b. Potassium

c. Calcium

d. Magnesium

Q17. Which metal is present in Calcium Hydroxide?

a. C

b. O

c. Ca

d. H

Q18. Which non-metal catches fire if the exposed to air

a. Sodium

b. Phosphorous

c. Calcium

d. Uranium

Q19. What is the chemical formula of copper sulphate?

a. CuSO4

b. CuCO3

c. CuCl2

d. CuO

Q20. Which gas are produced when metal react with acids

a. Oxygen

b. Nitrogen

c. Hydrogen

d. Carbon dioxide

Solution:

1.B

2.C

3.B

4.C

5.B

6.A

7.C

8.D

9.D

10.   A

11.   C

12.   B

13.   C

14.   B

15.   D

16.   A

17.   C

18.   D

19.   A

20.   C

The document Class 8 Science HOTS Questions - Materials : Metals and Non-metals (Old Syllabus) is a part of the Grade 6 Course Science for Grade 6.
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FAQs on Class 8 Science HOTS Questions - Materials : Metals and Non-metals (Old Syllabus)

1. What are the physical properties of metals?
Ans. Metals have various physical properties such as they are shiny, lustrous, ductile, malleable and good conductors of heat and electricity. They are also generally solid at room temperature, except for mercury.
2. What are the physical properties of non-metals?
Ans. Non-metals have various physical properties such as they are dull, brittle, non-ductile, non-malleable and poor conductors of heat and electricity. They can exist in all three states of matter (solid, liquid, and gas) at room temperature.
3. What are the chemical properties of metals?
Ans. Metals have various chemical properties such as they tend to lose electrons to form positive ions, they react with oxygen to form metal oxides, they react with acids to form salt and hydrogen gas, and they are generally more reactive when they are in their elemental state.
4. What are the chemical properties of non-metals?
Ans. Non-metals have various chemical properties such as they tend to gain electrons to form negative ions, they react with hydrogen to form hydrogen compounds, they react with oxygen to form non-metal oxides, and they are generally less reactive when they are in their elemental state.
5. What is the difference between a metal and a non-metal?
Ans. The main difference between a metal and a non-metal is that a metal is a good conductor of heat and electricity, while a non-metal is a poor conductor of heat and electricity. Metals tend to be shiny, ductile, malleable, and are generally solid at room temperature, while non-metals tend to be dull, brittle, non-ductile, and can exist in all three states of matter at room temperature. Metals also tend to lose electrons to form positive ions, while non-metals tend to gain electrons to form negative ions.
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