1. Which of the following is used in making smoke bombs ?
a. Sulphur
b. Hydrogen
c. Carbon
d. Phosphorus
Answer: Phosphorus
2. The gas usually filled in electric bulb is _____
a. Oxygen
b. Carbon di-oxide
c. Hydrogen
d. Nitrogen
Answer: Nitrogen
3. Which of the following is not an ore of Aluminium?
a. Felsper
b. Bauxite
c. Cryolite
d. Azurite
Answer: Azurite
4. The gases used in different types of welding would include ____
a. Oxygen & Hydrogen
b. Oxygen & Acetylene
c. Oxygen, acetylene & argon
d. Oxygen, hydrogen & nitrogen
Answer: Oxygen & Acetylene
5. Most soluble in water is ____
a. Camphor
b. Sugar
c. Sulphur
d. Common Salt
Answer: Sugar
6. Permanent hardness of water can be removed by adding ____
a. Washing Soda
b. Potassium Permanganate
c. Chlorine
d. Bleaching Powder
Answer: Washing Soda
7. Which of the following substance is a bad conductor of electricity but a good conductor of heat?
a. Mica
b. Celluloid
c. Asbestos
d. Purspecks
Answer: Mica
8. What in another name of Washing soda?
a. Calcium Carbonate
b. Sodium Carbonate
c. Calcium Bi-Carbonate
d. Sodium Bi-Carbonate
Answer: Sodium Carbonate
9. The chemical name of Uria is ____
a. Aneurin
b. Carbamide
c. Chloroetane
d. None of these
Answer: Carbamide
10. What is Bromine?
a. A Highly inflammable gas
b. A Black solid
c. A Red liquid
d. None of these above
Answer: A Red liquid
11. The metal used in storage batteries ____
a. Iron
b. Copper
c. Lead
d. Zinc
Answer: Lead
12. Water has maximum density at _____
a. –4°C
b. 0°C
c. 4°C
d. 100°C
Answer: 4°C
13. The filament of electric bulb is made of _____
a. Silver
b. Nichrome
c. Graphite
d. Tungsten
Answer: Tungsten
14. What are the two elements frequently used for making transistors?
a. Boron and Aluminium
b. Iridium and Tungsten
c. Silicon and Germenium
d. Niobium and Columbium
Answer: Silicon and Germanium
15. Which of the following is the most stable element?
a. Uranium
b. Lead
c. Hydrogen
d. Oxygen
Answer: Lead
a. Sulphur
b. Hydrogen
c. Carbon
d. Phosphorus
Answer: Phosphorus
2. The gas usually filled in electric bulb is _____
a. Oxygen
b. Carbon di-oxide
c. Hydrogen
d. Nitrogen
Answer: Nitrogen
3. Which of the following is not an ore of Aluminium?
a. Felsper
b. Bauxite
c. Cryolite
d. Azurite
Answer: Azurite
4. The gases used in different types of welding would include ____
a. Oxygen & Hydrogen
b. Oxygen & Acetylene
c. Oxygen, acetylene & argon
d. Oxygen, hydrogen & nitrogen
Answer: Oxygen & Acetylene
5. Most soluble in water is ____
a. Camphor
b. Sugar
c. Sulphur
d. Common Salt
Answer: Sugar
6. Permanent hardness of water can be removed by adding ____
a. Washing Soda
b. Potassium Permanganate
c. Chlorine
d. Bleaching Powder
Answer: Washing Soda
7. Which of the following substance is a bad conductor of electricity but a good conductor of heat?
a. Mica
b. Celluloid
c. Asbestos
d. Purspecks
Answer: Mica
8. What in another name of Washing soda?
a. Calcium Carbonate
b. Sodium Carbonate
c. Calcium Bi-Carbonate
d. Sodium Bi-Carbonate
Answer: Sodium Carbonate
9. The chemical name of Uria is ____
a. Aneurin
b. Carbamide
c. Chloroetane
d. None of these
Answer: Carbamide
10. What is Bromine?
a. A Highly inflammable gas
b. A Black solid
c. A Red liquid
d. None of these above
Answer: A Red liquid
11. The metal used in storage batteries ____
a. Iron
b. Copper
c. Lead
d. Zinc
Answer: Lead
12. Water has maximum density at _____
a. –4°C
b. 0°C
c. 4°C
d. 100°C
Answer: 4°C
13. The filament of electric bulb is made of _____
a. Silver
b. Nichrome
c. Graphite
d. Tungsten
Answer: Tungsten
14. What are the two elements frequently used for making transistors?
a. Boron and Aluminium
b. Iridium and Tungsten
c. Silicon and Germenium
d. Niobium and Columbium
Answer: Silicon and Germanium
15. Which of the following is the most stable element?
a. Uranium
b. Lead
c. Hydrogen
d. Oxygen
Answer: Lead
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