Which one is the best conductor of electricity?
Ni
Ag
Au
Na
The given table represents the use of non-metal.
The information in which row completes the given table?
i- Carbon; ii- freezing food; iii- sulphur
i- Sulphur; ii- kitchen foil; iii- zinc
i- Carbon; ii- kitchen foil; iii- zinc
i- Sulphur; ii- freezing food; iii- carbon
A silvery liquid element 'X' is a good conductor of heat and electricity at room temperature. The element 'X' is-
Aluminium
Magnesium
Mercury
Lead
The use of tungsten in electric bulb is based on the fact that:
Tungsten is sonorous.
Tungsten is a metal.
Tungsten has a high tensile strength.
Tungsten has a high density.
Metals react with oxygen to form ___________.
Acidic oxides
Basic oxides
Either acidic or basic oxides on depending on the metal.
There is no reaction
The characteristic properties of non-metals are:
I. Formation of acidic oxides
II. High density
III. Tendency to form anions
I and II only
I and III only
II and III only
All of the above
Which one of the following is used for the vulcanisation of rubber?
Carbon
Phospohorus
Sulphur
Chlorine
Gun metal is an alloy of:
Copper and aluminium
Copper, tin and zinc
Copper, zinc and nickel
Copper and tin
What is the chemical formula of sulphurous acid?
H2SO4
SO2
SO3
H2SO3
Most metals can be drawn into thin unbroken wires. This property is called
Allotropy
Conductivity
Ductility
Malleability
