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Chemistry Questions

Question 166:

On heating, under suitable conditions, 1 litres of monoatomic gas,X, combines with 1<sup style='font-size: smaller;'>1</sup>/<sub style='font-size: smaller;'>2</sub> litres of an oxide, What is the formula of the oxide.

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A XO<sub style='font-size: smaller;'>3</sub>
B X<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3</sub>
C X<sub style='font-size: smaller;'>3</sub>O<sub style='font-size: smaller;'>2</sub>
D XO<sub style='font-size: smaller;'>2</sub>
E None of the above

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Question 167:

If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litre of water,and resulting solution mixed thoroughly, the resulting sulpuric acid concentration will be?

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A 2.2 M
B 1.1 M
C O.22 M
D 0. 11 M
E 0.20 M

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Question 168:

Which of the following reactions is correct as as written?

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A FeCl<sub style='font-size: smaller;'>2</sub> + 3NH<sub style='font-size: smaller;'>4</sub>OH â†’ Fe(OH)<sub style='font-size: smaller;'>3</sub> + 3NH<sub style='font-size: smaller;'>4</sub>Cl
B Pb<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>3</sub> + 4HCl → PbCl<sub style='font-size: smaller;'>2</sub> + 2H<sub style='font-size: smaller;'>2</sub>O
C PbNO<sub style='font-size: smaller;'>3</sub> + H<sub style='font-size: smaller;'>2</sub>S â†’ PbS + 2HNO<sub style='font-size: smaller;'>3</sub>
D NaOH + H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub> â†’ NaHSO<sub style='font-size: smaller;'>4</sub> +H<sub style='font-size: smaller;'>2</sub>O
E 2NH<sub style='font-size: smaller;'>4</sub>NO<sub style='font-size: smaller;'>3</sub> â†’ N<sub style='font-size: smaller;'>2</sub> + 2H<sub style='font-size: smaller;'>2</sub>O

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Question 169:

Under high pressure, real gases do not obey gas laws because their molecules?

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A Have become more energetic
B Have become less energetic
C Have become smaller in size
D Decompose into atoms
E Start repelling each other

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Question 170:

How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm<sup style='font-size: smaller;'>3</sup> of 6M HCl? <br/>(Mg=24, H=1, Cl=35.5)

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A 1.2 g
B 0.7 g
C 0.5 g
D 0.3 g
E 0.12 g

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