Click the correct answer (True or False).
Click the correct answer.
Copper and silver occur in which of the following states?
Free state
Combined state
Both free and combined states
In form of radicals
Which of the following metals has/have high density?
Lithium
Sodium
Potassium
Iron
In which of the following methods a protective zinc coating is applied to iron articles to prevent them from rusting?
Oiling
Painting
Galvanisation
Alloy formation
Which of the following non-metals is used to manufacture bleaching powder?
Nitrogen
Hydrogen
Sulphur
Chlorine
Which of the following metalloids is used in thermal imaging cameras?
Silicon
Germanium
Arsenic
Antimony
Which of the following will be broken into pieces when hammered?
Coal and lead
Copper wire
Iron nail
Aluminium sheet
In which of the following conditions, iron nail will rust?
Nail in air tight test tube containing boiled water
Nail in air tight test tube containing anhydrous calcium oxide
Nail in open test tube containing tap water
Nail in air tight test tube without water
Click the correct answer.
is the purest form of iron and contains less than 0.1 per cent of carbon.
Pig iron
Cow iron
Wrought iron
Steel
is a bluish white metal used to make dry cells and electrodes.
Copper
Zinc
Iron
Aluminium
is a silvery metal which is liquid at room temperature.
Mercury
Aluminium
Graphite
Steel
is used in fireworks as it burns with a dazzling white flame.
Tungsten
Zinc
Platinum
Magnesium
is used as a catalyst in petroleum refining and hydrogenation.
Zinc
Platinum
Magnesium
Tungsten
Non-metals are
.
malleable
non-malleable
hardest
ductile
is used as a rocket fuel.
Hydrogen
Zinc
Carbon
Iron
