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Chemistry Past Questions and Answers

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Chemistry Questions

Question 636:

Which of the following tests will completely identify anyone of surphur (VI) oxide, hydrogen, carbon (IV) oxide and nitrogen (II) oxide?

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A Pass each gas into water and test with blue litmus paper
B Pass each gas into lime water
C Expose each gas to atmospheric air
D Pass each gas to concentrated tetraoxosulphate (IV) acid

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Question 637:

In the Haber process for the manufacture of ammonia, the catalyst commonly used is finely divided ?

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A Vanadium
B Platinum
C Iron
D Copper

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Question 638:

A metallic oxide which reacts with both HCl and NaOH to give salt and water only can be classified as?

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A An acidic oxide
B A basic oxide
C A neutral oxide
D An amphoteric oxide

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Question 639:

Which of the following metals will liberate hydrogen from steam or dilute acid?

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A Copper
B Iron
C Lead
D Mercury

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Question 640:

Coal fire should not be used in poorly ventilated rooms because ?

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A Of the accumulation of CO<sub style='font-size: smaller;'>2</sub> which causes dep sleep
B It is usually too hot
C Of the acumulation of CO which causes suffocation
D It removes most most of the gases in the rooms

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