If an alloy contains a metal mercury, what is it called?
(A) mercury alloy
(B) Iron Alloy
(C) Amalgam
(D) Zinc Alloy
Which of the following properties is not often present in organic compounds?
(A) soluble in water
(B) low melting point
(C) flammability
(D) all
Which metal can be cut with a knife among sodium, lithium, calcium and nickel?
(A) Sodium
(B) Lithium
(C) calcium
(D) all
Alkali metals (lithium, sodium, potassium) are so soft that they can be cut with a knife. The freshly cut surface is a shiny, silver colour, but this tarnishes quickly to a dull grey as the metal reacts with oxygen and water in the air.
Silver and copper heat?
(A) are the best drivers
(B) are less conductors
(C) are dielectrics
(D) is the best conductor
Which of the following metals are kept immersed in kerosene?
(A) Sodium
(B) Magnesium
(C) Zinc
(D) all
Which of the following metals is available in wire form?
(A) Calcium
(B) Magnesium
(C) Copper
(D) Lead
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