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Chemistry

Chemistry
The substance which does not expand on going from liquid state to solid state is

Water
Aluminium
Cast-iron
Type metal

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Chemistry
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

p-electrons in Ne(Z = 10)
d-electrons in Fe(Z = 26)
s-electrons in Mg(Z = 12)
p-electrons in CI(Z = 17)

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Chemistry
The metal compound commonly found in Sindhoor or Kumkum is based on

Zinc
Copper
Tin
Lead

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Chemistry
The element with highest ionization potential is

Boron
Helium
Carbon
Oxygen

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Chemistry
The green colour seen in firework displays is due to the chloride salt of :

Barium
Sodium
Strontium
Calcium

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Chemistry
White lung cancer' is caused by

Textiles
Paper
Silica
Asbestos

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MORE MCQ ON Chemistry

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