JEE Main & Advanced Chemistry The s-Block Elements Question Bank Critical Thinking

  • question_answer Four reactions are given below (i)\[2Li+2{{H}_{2}}O\to 2LiOH+{{H}_{2}}\] (ii)\[2Na+2{{H}_{2}}O\to 2NaOH+{{H}_{2}}\] (iii)\[2LiN{{O}_{3}}\xrightarrow{Heat}2LiN{{O}_{2}}+{{O}_{2}}\] (iv)\[2NaN{{O}_{3}}\xrightarrow{Heat}2NaN{{O}_{2}}+{{O}_{2}}\] Which of the above, if any, is wrong

    A) (iv)

    B) (iii)

    C) (i)

    D) None of these

    Correct Answer: B

    Solution :

    Lithium nitrate on heating gives \[\underset{(S)}{\mathop{4LiN{{O}_{3}}}}\,\,\xrightarrow{\Delta }\,\underset{(S)}{\mathop{2L{{i}_{2}}O}}\,+4N{{O}_{2}}\uparrow +{{O}_{2}}\uparrow \]

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