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Hydrogen Test - 48

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Hydrogen Test - 48
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  • Question 1
    1 / -0
    NaH is an example of : 
    Solution
    NaH is an example of ionic hydride which is also known as saline hydride.
  • Question 2
    1 / -0
    Decomposition of $$H_{2}O_{2}$$ can be prevented by addition of
    Solution
    Solution:- (A) Acitanilide
    The decomposition of $${H}_{2}{O}_{2}$$ can be prevented by the addition of little $${H}_{3}P{O}_{4}$$, glycerine, acetanilide, alcohol, etc. which can act as negative catalyst or inhibitors.
  • Question 3
    1 / -0
    Which of the following are soluble in water?
    Solution
    only sodium carbonate is soluble in water
  • Question 4
    1 / -0
    When a molten ionic hydride is electrolyzed 
    Solution
    On electrolysis molten ionic hydride liberate $$H_2$$ gas at the anode.

    At anode: $$2H^- \to H_2+2e^-$$
  • Question 5
    1 / -0
    $$Ca{H_2}$$ is an example of:
    Solution

  • Question 6
    1 / -0
    Why are the following metals not used in the lab preparation of hydrogen ?
    Solution
    Answer is (a) calcium, because Calcium is expensive.
  • Question 7
    1 / -0
    Which of the following does not react with water?
    Solution

  • Question 8
    1 / -0
    In lab $$H _ { 2 } \mathrm { O } _ { 2 }$$ is prepared by
    Solution
    Hydrogen peroxide is prepared from barium peroxide by the following methods: 
    (a) By the action of dilute sulphuric acid. A paste of hydrated barium peroxide ($$BaO2.8H_2O$$) is prepared in ice – cold water and then added slowly to an ice-cold solution of 20% $$H_2SO_4$$.
  • Question 9
    1 / -0
    Oxidizing properties of hydrogen peroxide are explained more by the
  • Question 10
    1 / -0
    Hydrogen is not obtained when Zinc reacts with:
    Solution
    Zinc does not react with cold water. Hence, it doesnot gives hydrogen gas.
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