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Metals And Non Metals Test - 6

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Metals And Non Metals Test - 6
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is the lightest element in the periodic table?
    Solution
    The lightest element in the periodic table is hydrogen. Its atomic weight is 1.008 amu.
  • Question 2
    1 / -0
    Which of the following statements is incorrect?
    Solution
    The statement that all metal oxides are basic in nature is incorrect because oxides of some metals like zinc and aluminium are amphoteric in nature.
  • Question 3
    1 / -0
    Which of the following properties differentiates metals from non-metals?
    Solution
    The statement which differentiates metals from non-metals is that non-metals do not replace hydrogen from acids, but metals can do.
  • Question 4
    1 / -0
    Gold is soluble in
    Solution
    Gold is soluble in aqua regia, which is a mixture formed by freshly mixing concentrated nitric acid and hydrochloric acid in the ratio 1 : 3.
  • Question 5
    1 / -0
    Which of the following burns in nitrogen gas?
    Solution
    Magnesium nitride can be produced by heating magnesium metal in a pure nitrogen atmosphere.
    3Mg + N2 → Mg3N2
  • Question 6
    1 / -0
    Nitrogen gas can be prepared by heating a mixture of
    Solution
    Nitrogen gas can be prepared by heating a mixture of sodium nitrite and ammonium chloride.
  • Question 7
    1 / -0
    Which of the following metals liberates hydrogen from cold water?
    Solution
    Sodium metal liberates hydrogen from cold water because sodium is a very reactive metal.
  • Question 8
    1 / -0
    Which of the following elements will not liberate hydrogen gas on its treatment with dilute HCl?
    Solution
    Copper will not liberate hydrogen gas on its treatment with dilute HCl. This is because copper is less reactive than hydrogen, so it cannot replace hydrogen from hydrochloric acid.
  • Question 9
    1 / -0
    Coloured glass used for goggles contains
    Solution
    Coloured glass used for goggles is composed of transition metal oxides (ferrous oxide), and also trace amounts of dopant are added to impart colours.
  • Question 10
    1 / -0
    The Government of India has totally banned the export of 'Burnt Coal' (Jhama) because it contains recoverable amount of a metal element used in transistors. Which of the following is the element?
    Solution
    The Government of India has totally banned the export of 'Burnt Coal' (Jhama) because it contains recoverable amount of germanium element, used in transistors.
  • Question 11
    1 / -0
    The filament of an electric bulb is made of
    Solution
    Tungsten is used for making the filament of an electric bulb due to the following reasons:
    Being an alloy it has a very high melting point. It has very high resistivity, so it does not burn easily at room temperature. The lamp glows at high temperatures.
  • Question 12
    1 / -0
    On increasing the temperature, the conduction in metallic conductors
    Solution
    On increasing the temperature, the conduction in metallic conductors decreases.
  • Question 13
    1 / -0
    Argentite is an ore of
    Solution
    Argentite is an ore of silver.
  • Question 14
    1 / -0
    The function of adding cryolite in the extraction of aluminium from pure alumina is
    Solution
    The function of adding cryolite in the extraction of aluminium from pure alumina is to decrease the fusion temperature and increase the electrical conductivity.
  • Question 15
    1 / -0
    Gunpowder may be used as
    Solution
    Gunpowder is a mixture of saltpeter (potassium nitrate), sulphur and charcoal. Together, these materials will burn rapidly and explode as a propellant.
  • Question 16
    1 / -0
    German silver is an alloy of
    Solution
    German silver is an alloy of copper, zinc and nickel.
  • Question 17
    1 / -0
    Amalgams are the alloys, which always contain
    Solution
    Amalgams are the alloys, which always contain mercury.
  • Question 18
    1 / -0
    Stainless steel usually contains about 15% of
    Solution
    Stainless steel usually contains about 15% of chromium.
  • Question 19
    1 / -0
    The purest form of iron is
    Solution
    Wrought contains 0.12 to 0.25% carbon and is thus the purest form of iron.
  • Question 20
    1 / -0
    Which of the following is the reference electrode made from?
    Solution
    The reference electrode is made from Hg2CI2.
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