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Chemistry Questions

Question 831:

Which of the following are produced when ammonium trioxonitrate (V) crystals are cautiously heated in a hard glass round bottomed flask?

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A N<sub style='font-size: smaller;'>2</sub>O and steam
B NO<sub style='font-size: smaller;'>2</sub> and ammonia
C N<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>2</sub> and NO<sub style='font-size: smaller;'>2</sub>
D NO and NO<sub style='font-size: smaller;'>2</sub>

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Question 832:

Which of these metals CANNOT replace hydrogen from alkaline solutions?

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A Alulinium
B Zinc
C Tin
D Iron

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Question 833:

Clothes should be properly rinsed with water after bleaching because?

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A The bleach decolourizes the cothes
B Chlorine reacts with fabrics during bleaching
C The clothes are sterilized during bleaching
D Hydrogen chloride solution is produced during bleaching

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Question 834:

Which of these solutions will give a white precipitate with a solution of barium chloride acidified with hydrochloric acid?

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A Sodium trioxocarbonate (IV)
B Sodium tetraoxosulphate (IV)
C Sodium trioxosulphate (IV)
D Sodium sulphide

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Question 835:

SO<sub style='font-size: smaller;'>3</sub> is NOT directly dissolved in water in the preparation of H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub> by the contact process because?

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A The reaction between SO<sub style='font-size: smaller;'>3</sub> and water is violently exothermic
B Acid is usually added to water and never water to acid
C SO<sub style='font-size: smaller;'>3</sub> does not dissolve in water readily
D SO<sub style='font-size: smaller;'>3</sub> is an acid gas

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