Chemical Process
Iron ore hametite is concentrated using

Electro magnetic separation mainly
Froth floatation
Roasting
Gravity separation

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
Oil is a/an

Solid at normal temperature
Mixture of glycerides of fatty acids
Ester of alcohols other than glycerine
Mixture of glycerides

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is

A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
A slow reaction
All of these
Still in development stage (by employing fluidised bed technique)

ANSWER DOWNLOAD EXAMIANS APP