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.
Gold is used in _________________.
Thermometer
Fuel
Jewellery
Machinery
A silvery liquid element 'X' is a good conductor of heat and electricity at room temperature. The element 'X' is-
Aluminium
Magnesium
Mercury
Lead
All types of steel essentially contain
Iron and manganese
Iron and carbon
Manganese and chromium
Carbon and manganese
Which one is the best conductor of electricity?
Ni
Ag
Au
Na
What is the chemical formula of copper sulphate?
CuSO4
CuCO3
CuCl2
CuO
A mixture of copper and zinc is called
Brass
Bronze
Solder
Steel
Which two of these elements are metals?
I. Iodine
II. Aluminium
III. Zinc
IV. Carbon
I and II
II and III
III and IV
IV and I
Which material shows shiny appearance?
Coal
Sulphur
Carbon
Zinc replaces copper from ________________.
Zinc sulphate
Copper sulphate
Sulphuric acid
Copper oxide
