Which one of the following metal is always stored under kerosene?
Sodium
Aluminium
Magnesium
Copper
Which one is the best conductor of electricity?
Ni
Ag
Au
Na
All types of steel essentially contain
Iron and manganese
Iron and carbon
Manganese and chromium
Carbon and manganese
Aluminium metal is not acted upon by pure water as:
It is a light metal.
It is not a reactive metal.
It is protected by a film of aluminium oxide.
Impurities in water are essential for reaction to occur.
Stainless steel (an alloy containing iron, chromium and nickel) does not rust because
Iron form a hard chemical with chromium
Chromium form a coating of oxide that protects iron
Nickel does not rust
None of these
The characteristic properties of metals are:
I. Malleability
II. Ductility
III. Formation of acidic oxides
I and II only
II and III only
III and I only
All of the above
Which of the following will displace copper from a solution of copper (II) sulphate?
I. Zn
II. Fe
III. Ag
IV. Mg
I, II and III only
I, II and IV only
What is the chemical formula of copper sulphate?
CuSO4
CuCO3
CuCl2
CuO
Which of the following are solid non-metals?
I. Carbon
II. Sulphur
III. Phosphorus
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
