21.
The metal with the lowest density from the following is
A
Mg
B
Li
C
Ag
D
Au
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The metal with the lowest density from the following is
Mg
Li
Ag
Au
The metal which is soft?
Na
Pb
Al
Cu
Which of the following is not a property of aluminum?
Good conductor of heat and electricity
It is malleable
It is heavy
It is ductile
An alloy of Al and Mg is
Duralumin
T – metal
Alnico
Magnalium
Aluminum bronze is made up of
Al, Cu, Mn
Fe, Al, Ni
Al, Cu, Ni
Al, Cu
The alloy which contains aluminum is
Nichrome
Type metal
Duralium
Gunmetal
Copper and tin are components of
Brass
Invar
Bell metal
Alnico
The alloy in which copper is a component is
Bronze
Steel
Solder
Nichrome
Extraction of copper is done from copper pyrite which contai small quantity of
Zinc
Iron
Sodium
Carbon
A homogeneous solid solution of two or more metals is
Alloy
Allotrope
Isotope
Isobars
The metal extracted from limestone, marble and chalk is
Sodium
Calcium
Aluminum
Iron
Which of the following are the ores of zinc?
Calamine and zinc blend
Zinc blend and cerussite
Calomine and siderite
Zinc blend and carnallite
Which of the following is a carbonate ore of copper?
Cuprites
Pyrite
Copper glance
Malachite
Copper, which is extracted from cuprites, is a / an
Sulphide ore
Carbonate ore
Oxide ore
Halide ore
Haematite is an ore of
Fe
Zn
Cu
Al
Which of the following statement is true?
All minerals are ores
All minerals are not ores
All ores are not minerals
Some ores are minerals
Which of the following is called as noble metal?
Mercury
Gold
Lithium
Cesium
Which of the following metal is present in native state?
Platinum
Iron
Potassium
Copper
In the native state of metal, it is present
As a mixture with a metal
In free state
As a mixture with a nonmetal
As a mixture with a compound
Due to its semiconductor properties, the nonmetal used in computers, TV, etc. is
Carbon
Silicon
Bromine
Fluorine