In the process of electrolytic refining of metal M, the anode, the cathode and the electrolyte are
impure M, pure M , the metal salt
the metal salt, impure M, any salt
the metal salt pure M any salt
pure M impure M the metal salt
Name a compound used for making explosures.
KCl
K2SO4Al2(SO4)324H2O
KNO3
K2SO4
Most metals burn in air. What do they form ? What is the nature of the resultant?
metal oxides which are acidic
metal hydroxides which are basic
metal oxides which are basic
metal hydroxides which are acidic
Which physical property of a gas is described by using the fountain experiment?
Vapour density
Solubility in water
Colour
Odour
Which of the following statements is incorrect regarding metals?
Metals are ductile.
Metals are sonorous.
Metals have a shiny appearance.
Metals are poor conductors of heat.
Which is the reducing agent in the extraction of Iron?
CaCO3
FeO
CO
SiO2
Which of the following ores is not an ore of iron?
Siderite
Haematite
Malachite
Magnetite
Which of the following substances is malleable?
Sulphur
Mercury
Aluminium
Phosphorus
Ammonia can be found in both free state and combined state. Which of the following alternatives does not give a source of ammonia?
Air
Natural water
Distillation of coal or wood
Exhaust of automobile engines
