Which of these metals exists as liquid at room temperature?
Sodium
Mercury
Gallium
Caesium
This is a chemical element that is mechanically weak in its most stable form.
Metal
Non-metal
This is the metal that can easily be cut with a knife.
Sodium
Zinc
Aluminium
Gold
Which property of a metal is used for making guitar strings?
Lustrous
Good conductor of heat
Good conductor of electricity
Sonorous
If a metal is ___________ it can be drawn into a wire.
Malleable
Magnetic
Ductile
Conductive
Non-metals form covalent chlorides because ____________.
They can give electrons to chlorine
They can share electrons with chlorine
They can give electrons to chlorine atoms to form chloride ions
They cannot share electrons with chlorine atoms
Which of the following non-metal is good conductor of electricity?
Graphite
Phosphorus
Hydrogen
Bromine
Calcination is the process of heating the ore _________.
In a blast furnace
In absence of air
In presence of air
None of these
The process to heat the ore in the presence of excess supply of air below its melting point is called _________.
Calcination
Smelting
Roasting
Liquidation
Oxides of non-metals are _______ in nature.
Acidic
Basic
Neutral
Sometimes acids and sometimes neutral
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