1. Which of the following does not contain silver?
a) German Silver
b) Horn Silver
c) Ruby Silver
d) Lunar Silver
Answer: a
2. Which of the following is an iron ore?
a) Bauxite
b) Magnetite
c) Lignite
d) Nitrite
Answer: b
3. An amalgam is an alloy in which the base metal is:
a) Aluminium
b) Mercury
c) Copper
d) Zinc
Answer: b
4. The most important ore of lead is:
a) Galena
b) Magnetite
c) Pyrolusite
d) Siderite
Answer: a
5. The percentage of carbon in steel typically ranges from:
a) 0.1% to 1.5%
b) 1.5% to 3.0%
c) 3.0% to 4.0%
d) 4.0% to 6.0%
Answer: a
6. Uraninite is an ore of:
a) Zinc
b) Uranium
c) Titanium
d) Aluminium
Answer: b
7. Fuse wire is made from an alloy of:
a) Tin and Lead
b) Tin and Copper
c) Lead and Copper
d) Copper and Silver
Answer: a
8. Pyrolusite is an ore of:
a) Mercury
b) Manganese
c) Molybdenum
d) Lead
Answer: b
9. The alloy used for heating elements in electric heaters is:
a) Solder
b) Alloy steel
c) Nichrome
d) German silver
Answer: c
10. Beryl is an ore of:
a) Nickel
b) Beryllium
c) Lead
d) Tin
Answer: b
11. The purest commercial form of iron is:
a) Pig iron
b) Steel
c) Stainless steel
d) Wrought iron
Answer: d
12. Molybdenite is an ore of:
a) Molybdenum
b) Nickel
c) Silver
d) Tin
Answer: a
13. The iron ore with the highest iron content (72%) is:
a) Magnetite
b) Limonite
c) Haematite
d) Siderite
Answer: a
14. Manganite is an ore of:
a) Beryllium
b) Chromium
c) Manganese
d) Copper
Answer: c
15. Extraction of iron from its ore involves:
a) Oxidation
b) Reduction
c) Electrolysis
d) Fractional distillation
Answer: b
16. Sphalerite is an ore of:
a) Mercury
b) Molybdenum
c) Zinc
d) Silver
Answer: c
17. Heating of ore below its melting point in the absence of air is called:
a) Leaching
b) Roasting
c) Smelting
d) Calcination
Answer: d
18. Turquoise is an ore of:
a) Copper
b) Manganese
c) Mercury
d) Tin
Answer: a
19. Aluminium is purified by:
a) Oxidation
b) Electrolysis
c) Ozonolysis
d) Distillation
Answer: b
20. Chromite is an ore of:
a) Zinc
b) Uranium
c) Titanium
d) Chromium
Answer: d
21. The major elements in stainless steel are:
a) Iron and Carbon
b) Silver
c) Iron, Chromium, and Nickel
d) Iron and Nickel
Answer: c
22. Which metal is found in free (native) state?
a) Copper
b) Iron
c) Tin
d) Lead
Answer: d
23. Which of the following is an ore of aluminium?
a) Galena
b) Cryolite
c) Cinnabar
d) Epsom salt
Answer: b
24. The most abundant element on Earth is:
a) Calcium
b) Silicon
c) Oxygen
d) Nitrogen
Answer: c
25. Which of the following is an iron ore?
a) Dolomite
b) Epsom salt
c) Siderite
d) Galena
Answer: c
26. Stainless steel is an alloy of:
a) Chromium and Carbon
b) Chromium and Iron
c) Chromium, Carbon, and Iron
d) Chromium and Zinc
Answer: c
27. The Earth’s crust is primarily composed of:
a) Oxygen and Iron
b) Oxygen and Silicon
c) Silicon and Iron
d) Silicon and Aluminium
Answer: b