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    Chemistry-
    General
    Easy

    Question

    Generally non-metals are not lustrous. Which of the following non-metal is lustrous?

    1. Sulphur    
    2. Phosphorus    
    3. Nitrogen    
    4. Iodine.    

    The correct answer is: Iodine.

      Iodine is lustrous

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      Statement–1: P C l subscript 5 end subscript open parentheses g close parentheses rightwards harpoon over leftwards harpoon P C l subscript 3 end subscript open parentheses g close parentheses plus C l subscript 2 end subscript open parentheses g close parentheses. If more Cl2 is added the equilibrium constant will decrease.
      Statement–1 : Addition of inert gas to the equilibrium mixture at constant volume does not alter the equilibrium.

      Statement–1: P C l subscript 5 end subscript open parentheses g close parentheses rightwards harpoon over leftwards harpoon P C l subscript 3 end subscript open parentheses g close parentheses plus C l subscript 2 end subscript open parentheses g close parentheses. If more Cl2 is added the equilibrium constant will decrease.
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      Statement–1: For N subscript 2 end subscript open parentheses g close parentheses plus 3 H subscript 2 end subscript open parentheses g close parentheses rightwards harpoon over leftwards harpoon 2 N H subscript 3 end subscript open parentheses g close parenthesesthe equilibrium constant is ‘K’ then for fraction numerator 1 over denominator 2 end fraction N subscript 2 end subscript open parentheses g close parentheses plus fraction numerator 3 over denominator 2 end fraction H subscript 2 end subscript open parentheses g close parentheses rightwards harpoon over leftwards harpoon N H subscript 3 end subscript open parentheses g close parentheses the equilibrium constant will be square root of K
      Statement–2 : If concentration are changed to half the equilibrium constant will be halved.

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      If the composition of the system does not change with time, the system is said to be in chemical equilibrium. It is the state in which net reaction of a system is zero. In another words we can say that in reversible reactions, a stage is reached when the rate of transformation of reactants into products equals to the rate of transformation of products into reactants. At this stage, the composition of reactants and products does not change with time. This does not mean that the reaction has ceased, as both reverse and forward reactions are still taking place but with equal rate. Such equilibria are called dynamic equilirbria.
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      Let us consider a reaction of the type
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