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CDS - Inorganic Chemistry Test 1316
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CDS - Inorganic Chemistry Test 1316
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  • Question 1/5
    1 / -0.33
    Iron when exposed to moist air for a long time acquires a coating of a
    Solutions
     Iron when exposed to moist air for a long time acquires a coating of a brown flaky substance called rust. The rusting of iron can be prevented by painting, oiling, greasing, galvanizing, chrome plating, anodizing or making alloys. Hence, option A is correct.

  • Question 2/5
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    What are the constituents of alloy Bell metal?
    Solutions
     Bell metal is an alloy that is primarily used for making bells and other related instruments. It can be considered a form of bronze that contains a relatively large amount of tin in its composition. The typical composition of bell metal is: Copper (Cu) – 78% and Tin (Sn) – 22%. Hence, option B is correct.
  • Question 3/5
    1 / -0.33

    Which one of the following metals is least reactive?

    Solutions

     Platinum is one of the least reactive metals. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Hence, option A is correct.

  • Question 4/5
    1 / -0.33
    Which one of the following is not an example of an oxidation reaction?
    Solutions
     1. H2S + Br2 → 2 HBr + S - (oxidation of sulfide)

    2. Fe + S → FeS - (oxidation of Iron)

    3. C + O2 → CO2 - (oxidation of carbon)

    4. N2 + 3 H2 → 2NH3 - ( reduction of nitrogen) Hence, option D is correct.

  • Question 5/5
    1 / -0.33

    Citric acid is not found in

    Solutions

     Citric acid occurs in a variety of fruits and vegetables, most notably citrus fruits. Lemons, oranges and limes have particularly high concentrations of the acid; it can constitute as much as 8% of the dry weight of these fruits.

    Hence, option C is correct.

    ADDITIONAL INFORMATION: Methanoic acid, also known as formic acid is present in ant stings.


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