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Materials Metals and Non Metals Test - 16

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Materials Metals and Non Metals Test - 16
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The ability of metals to be drawn into thin wires is known as:
    Solution
    The ability of metals to be drawn into thin wires is known as ductility.

    Option A is correct.
  • Question 2
    1 / -0
    A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. The non-metal is :
    Solution
    Iodine is a natural dark violet, a non-metallic element that plays a key role in human metabolism. Iodine, for example, is slightly soluble in water and gives a yellowish-brown solution. Brown solutions are also formed with alcohol.
    Iodine is usually used in an alcohol solution (called tincture of iodine) or as Lugol's iodine solution as a pre-and post-operative antiseptic. Some people do not recommend disinfecting minor wounds with iodine because of the concern that it may induce scar tissue formation and increase healing time.
  • Question 3
    1 / -0
    Metals are generally hard. But which of the following metal is an exception that it can be cut with a knife?
    Solution
    Metals, in general, are hard solids at room temperature. Sodium, Potassium and Lithium are exceptional metals as they are soft.

    Sodium is stored in kerosene and is so soft that it can be cut with a knife.

    Hence the correct option is B.
  • Question 4
    1 / -0
    Boojho has learned that non-metals on beating with a hammer are generally broken into pieces. Which of the following can be broken into pieces?
    Solution
    Iron, aluminum, and copper are metals, and carbon is nonmetal. As carbon is non-metal, it is neither malleable nor ductile. On beating with a hammer, carbon can be broken into pieces. Coal is a form of carbon, and so option D is correct. 
  • Question 5
    1 / -0
    Non-metal which is used to sterilize water is :
    Solution
    Chlorine is a non-metal which is used to disinfect water. 

    Chlorine can be applied for the deactivation of most microorganisms like bacteria.

    Hence the correct option is C.
  • Question 6
    1 / -0
    Non-metal which is essential for our life and all living beings inhale it during breathing is :
    Solution
    An essential non metal used in breathing by all living beings is 'Oxygen'
  • Question 7
    1 / -0
    Which liquid metal is used for making thermometers?
    Solution
    Mercury is used in many thermometers. 
    Since Liquids have a definite volume but indefinite shape, it is convenient to use a liquid to make a thermometer since the liquid will expand/contract based on heating and you can measure the temperature with just a ruler. Mercury is a liquid for a large temperature range around room temperature, so it is convenient. 
  • Question 8
    1 / -0
    The substance that will be flattened on beating with a hammer is:
    Solution
    Iodine, sulfur, coal etc. are non-metals that are non-malleable.

    Whereas zinc being a metal is malleable and hence, zinc granules can be flattened when beaten with a hammer.

    Hence, the correct option is D.
  • Question 9
    1 / -0
    Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

    The allotropic form of a non-metal, which is a good conductor of electricity is: 
    Solution
    Graphite, which is an allotrope of carbon, is a good conductor of electricity due to presence of free electrons.
  • Question 10
    1 / -0
    Which non-metal has a shining surface?
    Solution
    Graphite is a non-metal that has exceptional lustrous property.
    Option A is correct.
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