Food cans are coated with tin and not with zinc because
  • zinc is costlier than tin
  • zinc is less reactive than tin
  • zinc is more reactive than tin
  • zinc has higher melting point than tin
Iconic compounds conduct electricity in
  • Solid state
  • fused state
  • Gaseous state
  • Do not conduct electricity at all
Ionic compounds are soluble in
  • ether
  • benzene
  • Water
  • alcohol
In thermite process reducing agent is
  • \(C\)
  • None of these
  • \(Al\)
  • \(Cl\)
Silver metal becomes black on exposure to air by the coating of
  • Silver hydroxide
  • Silver chloride
  • Silver sulphide
  • Silver oxide
Ionic compound have
  • Low melting and high boiling points
  • High melting and low boiling points
  • Low melting and low boiling points
  • High melting and high boiling points
On addition of which metal, copper sulphate solution (Blue color) will be changed to colorless solution
  • \(Fe\)
  • \(Zn\)
  • \(Ag\)
  • \(Hg\)
Pure gold is equal to
  • 100 carat
  • 22 carat
  • 24 carat
  • 1000 carat
Horn silver is a/an
  • oxide ore
  • sulphate ore
  • halide ore
  • sulphide ore
Which of the following metals generally occur in liquid sate?
  • Gallium
  • Bromine
  • Mercury and Gallium both
  • Mercury
Which of the following metals reacts vigorously with oxygen?
  • Magnesium
  • Zinc
  • Sodium
  • copper
Exception of octet rule is
  • \(K\)
  • \(He\)
  • \(Ca\)
  • \(N\)
When sodium reacts with cold water, then the product formed will be
  • All of these
  • \(Na_2CO_3\)
  • \(NaOH\)
  • \(Na_2O\)
Process of roasting and calcination takes place in
  • electrolytic cell
  • blast furnace
  • Bessemer converter
  • reverberatory furnace
Match the columns
Column A
(Ore)
Column B
(Nature of ore)
(a) Copper glance (i) sulphate ore
(b) Calamine (ii) Halide ore
(c) Rock salt (iii) Sulphide ore
(d) Epsom salt (iv) Carbonate ore
  • a(iv), b(i), c(ii), d(iii)
  • a (iii), b (iv), c (ii), d (i)
  • a (iv), b (ii), c (iii), d (i)
  • (A) a(i), b (ii), c (iii), d (iv)
Which of the following is used in reduction of alumina?
  • Aluminum
  • Electricity
  • Carbon monoxide
  • Coke
An alloy which does not contain copper is
  • german silver
  • magnalium
  • brass
  • bronze
In the formation of ionic bond, cation is formed by
  • gain of electron(s).
  • loss of electrons (s).
  • None of these
  • Sharing of electrons (s)
Which reducing agent is used in chemical reduction?
  • \(C\)
  • \(CO\)
  • \(Al\)
  • All of these
Reactivity of zinc is .............. than hydrogen
  • equal
  • sometimes more sometimes less
  • more
  • less
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