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Chemistry Past Questions and Answers

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Chemistry Questions

Question 601:

Bleaching powder, CaOCI<sub style='font-size: smaller;'>2</sub>, H<sub style='font-size: smaller;'>2</sub>O, deteriorates on exposure to air because

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A It loses its water of crystallization
B Atmospheric nitrogen displaces chlorine from it
C Carbon (IV) oxide of the atmosphere displaceschlorine from it
D Bleaching agents should be stored in solution

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Question 602:

The products of the thermal decomposition of ammonium trioxonitrate (V) are

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A NO <sub style='font-size: smaller;'>2</sub> and oxygen
B NH<sub style='font-size: smaller;'>3</sub> and oxygen
C Nitrogen and water
D N<sub style='font-size: smaller;'>2</sub>O and water

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Question 603:

The scale of a chemical balance is made of iron plate and coated with copper electrolytically because

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A Iron is less susceptible to corrosion than copper
B Copper is twice as less susceptitible to corrosion as iron
C Copper is less susceptible to corrosion than iron
D Copper and iron are equally susceptible to corrosion

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Question 604:

A metal is extracted from its ore by the electrolysis of its molten chloride and it displaces lead from lead (ll) trioxonitrate (V) solution. The metal is

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A Copper
B Aluminium
C Zinc
D Sodium

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Question 605:

A metal is extracted from its ore by the electrolysis of its molten chloride and it displaces lead from lead (ll) trioxonitrate (V) solution. The metal is

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A Copper
B Aluminium
C Zinc
D Sodium

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