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Hydrogen & S-Block elements Test - 1

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Hydrogen & S-Block elements Test - 1
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Chemical which is not present in clear hard water, is

    Solution

    MgCO3 is insoluble in water.

  • Question 2
    1 / -0

    Choose the correct order of equivalent conductance at infinite dilution.
    For: LiCl, NaCl and KCl.

    Solution

    The ease of ionization of the given compounds will be in the order KCl > NaCl > LiCl, hence equivalent conductance at infinite dilution increases in the same order.

  • Question 3
    1 / -0

    Among the following which has maximum lattice energy?

    Solution

    MgO, Mg2+ ion is smallest in size and double the charge in comparison to Li+and Na+ ions.

  • Question 4
    1 / -0

    Which of the following is not correct about the solution when moderate amount of sodium metal is dissolved in liquid ammonia at low temperature?

    Solution

    All other statements are correct.

  • Question 5
    1 / -0

    Which of the following does not form alum?
    Note: The general formula of an alum is M2SO4.M2′(SO4)3.24H2O Where M is univalent and M′ is a trivalent metal.

    Solution

    Li does not form alum because of its small size.

  • Question 6
    1 / -0

    Which of the following is called black ash?

    Solution

    Na2CO3 + CaS is called black ash.

  • Question 7
    1 / -0

    Which of the following is obtained on hydrolysis of Mg2C3?

    Solution

    On hydrolysis Mg2C3 (allylide) gives C3H4 (allylene).

  • Question 8
    1 / -0

    Which property of sodium is being used in street lights?

    Solution

    The property of sodium atom to emit photons in yellow region of visible spectrum, due to electrically stimulated electron transitions is used in street lights.

  • Question 9
    1 / -0

    Graphite anode is used in Down’s cell (for production of sodium), because

    Solution

    Anode (of graphite) has no reaction with chlorine (liberated at anode).

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