CBSE Class 8 Science Worksheet
Materials: Metals and Non Metals
1.
State True or False: Copper reacts with dilute hydrochloric acid on heating.
A)
TRUE
B)
FALSE
2.
State True or False: Graphite can be drawn into wires.
A)
TRUE
B)
FALSE
3.
State True or False: Articles made of metals produce ringing sound when struck hard.
A)
TRUE
B)
FALSE
4.
Fill in the blanks: The property of metal to produce ringing sound is called __________.
5.
Fill in the blanks: In __________ reaction a more reactive metal displaces a less reactive metal from its salt solution.
6.
Name two non metals which are present in fertilizers.
7.
Why silver doesn't displace hyrogen from dilute hydrochlroic acid?
8.
Choose the correct answer: Which gas is evolved when metal reacts with water?
A)
Nitogen
B)
Hydrogen
C)
Oxygen
D)
Carbon Dioxide
9.
Choose the correct answer:What is the product when sulphur reacts with oxygen?
A)
Sulphur trioxide
B)
Sulphur dioxide
C)
Sulphuric acid
D)
Sulphurous acid
10.
State True or False: Boron is a metal.
A)
TRUE
B)
FALSE
11.
Why is aluminium is used for making utensils for cooking inspite of being a highly reactive metal?
12.
Fill in the blanks: Two soft metals which can be cut with knife are ___________ and ___________.
13.
Fill in the blanks: Lead is ________ reactive magnesium.
14.
Choose the correct answer: Which of the following metal is a poor conductor of electricity?
A)
Iron
B)
Aluminium
C)
Copper
D)
Lead
15.
Choose the correct answer: What is the nature of non metallic oxide?
A)
Acidic
B)
Basic
C)
Neutral
D)
None of these
16.
Choose the correct answer: Metals which produce ringing sounds are _________________.
A)
Malleable
B)
Ductile
C)
Sonorous
D)
None of these
17.
Choose the correct answer: What product is formed if sulphur is mixed with hydrochloric acid?
A)
Sulphur dioxide
B)
Sulphurous acid
C)
Sulphuric acid
D)
No reaction will occur
18.
State True or False: When the ash obtained on burning magnesium ribbon is dissolved in water, the blue litmus turns red.
A)
TRUE
B)
FALSE
19.
State True or False: Zinc reacts with cold water.
A)
true
B)
false
20.
Choose the correct answer: The property of metal by which it can be drawn into wires is called ________________.
A)
Malleability
B)
Ductility
C)
Sonorous
D)
Conductivity
CBSE Class 8 Science Worksheet
Materials: Metals and Non Metals
Answers
1.
Option B
2.
Option B
3.
Option A
4.
sonority
5.
Displacement
6.
Nitrogen and phosphorus.
7.
Because silver is less reactive than hydrogen.
8.
Option B
9.
Option B
10.
Option B
11.
Aluminium is a good conductor of electricity. When it is exposed to moist air for a long time, its surface gets covered with thin layer of oxides which prevents the metal underneath from further corrosion.
12.
Sodium, potassium
13.
less
14.
Option D
15.
Option A
16.
Option C
17.
Option D
18.
Option B
19.
Option B
20.
Option B