Category: Materials and Construction

A. Fluorine (dry or wet)
B. Sulphuric acid
C. Phosphoric acid
D. None of these

A. Are exemplified by clay and mica
B. Are poor electrical conductors due to lack of free electrons
C. Never exhibit polymorphism
D. All A., B. and C.

A. Magnetic steel
B. Titanium
C. Chromium
D. Magnesium

A. Enough plasticity
B. Low thermal conductivity
C. Low co-efficient of friction
D. High toughness

A. Prevent its rusting by contact with corrosive atmosphere
B. Protect the base metal by cathodic protection
C. Both A. & B.
D. Neither A. nor B.

A. Charcoal
B. Calcium carbide
C. Hydrocarbon oil
D. Graphite

A. Beryllium
B. Manganese
C. Copper
D. Iron

A. Cans for food packing
B. Collapsible tubes for toilet preparations
C. Foil for wrapping cheese
D. All A., B. and C.

A. Plastics
B. Fibres
C. Elastomers
D. Both rubber & elastomers

A. Mild steel
B. Lead
C. Copper
D. Special alloys