The document discusses important facts about metals and their properties. It provides information on different types of metals like gold, aluminum, alkali metals, and tungsten. It also contains 20 multiple choice questions testing understanding of metallic properties, extraction of metals from ores, uses of metals and alloys, and periods in history defined by predominant metal usage. Key points covered include that gold is usually mixed with other metals to increase strength, aluminum is highly abundant and a good conductor, and periods like the Stone Age are named for the most used metal of that time.

1. Metals

2. Multiple
Choice
Questions

3. Important facts:
• The study of metals is called Metallurgy.
• pure gold is very soft for making any articles.
• Gold is usually combined with other metals to
make it stronger.
• 24 Karat gold is 100% pure gold and 18 karat gold
contains 75% gold while the remaining is other
metals.
• Periods of history have been defined as stone age,
bronze age and iron age depending on the metal
that was most used in those periods.
• Gold is shiny and doesn’t corrode like most other
metals and that is one of the important reasons for
it being chosen for making jewellery.

4. • Aluminium is the most abundant metal as the
entire core of the earth is primarily composed of
iron.
• Aluminium is an excellent conductorof heat and
widely used to make cooking pots.
• Alkali metals like as sodium, potassium, rubidium,
cesium etc. are extremely reactive elements and
cause explosion when they come in contact with
air or water.
• They are carefully stored in oil to prevent accident.
• Tungsten has a very high melting point, after
carbon it has the second highest melting point of
all elements.

5. 1) Which of the following is not a metallic property?
a) Luster
b) Magnetism
c) Ductility
d) Brittleness
2) ________ is not a metal.
a) Titanium
b) Nickel
c) Cobalt
d) None of these
d) Brittleness
d) None of these

6. 3) Metals are extracted from ______.
a) Ores
b) Metals
c) Lava
d) All of these
4) The property where metal shine is called ______
a) Luster
b) Malleability
c) Ductility
d) Mangnetism
5) The property where metals can be drawn into wires is called
________
a) Luster
b) Malleability
c) Ductility
d) Magnetism
a) Ores
a) Luster
c) Ductility

7. 6) The property where metals can be drawn into thin
sheets is called _____.
a) Luster b) malleability
c) Ductility d) magnetism
7) _______ metal is liquid at room temperature.
a) Cobalt b) mercury
c) Antimony d) all of these
8) _______ is not a pure metal.
a) Zinc b) copper
c) Iron d) none of these
b) malleability
d) none of these
b) mercury

8. 9) Alloys are _________ & ______ compared to
elemental metals.
a) Stronger, durable b) heavier, durable
c) Lighter, stronger d) lighter , durable
10) _______ is added to iron to make steel.
a) Tungsten b) cobalt
c) Carbon d) aluminium
11) Stainless steel is an alloy made using steel and
____
a) Tungsten b) cobalt
c) Carbon d) aluminium
a) Stronger, durable
c) Carbon
b) cobalt

9. 12) Aluminium and ____ can make an alloy which is
rust free.
a) Iron b) steel
c) Copper d) cobalt
13) Property of metals making a ringing sound when
struck is called ______.
a) Malleability b) sonorous
c) Ductility d) hardness
14) Which of the following is a soft metal that can be
cut with a knife.
a) Iron b) zinc
c) Sodium d) copper
c) Copper
b) sonorous
c) Sodium

10. 15) The process of obtaining a pure metal from one of
its ore is known as ____
a) Surgery b) allergy
c) Metallurgy d) none of these
16) Gold can corrode.
a) True b) false
17) Copper is the most abundant metal found in the
earths surface.
a) True b) false
c) Metallurgy
b) false
b) false

11. 18) Potassium explodes when exposed to water.
a) True b) false
19) Carbon has the highest melting points of all
elements.
a) True b) false
20) Bronze age arrived after the iron age.
a) True b) false
a) True
a) True
b) false