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JEE Main & Advanced Sample Paper JEE Main Sample Paper-6

  • question_answer
    Directions: Question No. 50 are Assertion- Reaction type. Each of these contains tow statements Statement I (Assertion), Statement II (Reason). Each of these questions also has four alternative choices, only on of which is correct. You have to select the correct choices from the codes a, b, c and d given below: 
    Statement I : White phosphorus is more reactive than red phosphorus.
    Statement II : Red phosphorus consists of \[{{P}_{4}}\]tetrahedral units linked to one another to form linear chains.

    A)  Statement I is true; Statement B is true; Statement B is not a correct explanation for Statement I,

    B)  Statement I is true; Statement II is false.

    C)  Statement I is false; Statement II is true.

    D)  Statement I is true; Statement II is true; Statements is the correct explanation for Statement I.

    Correct Answer: A

    Solution :

    White phosphorus exists as P^ tetrahedral molecule having P-P-P bond angle \[60{}^\circ \]. Hence, the molecule is under strain and more reactive. On the other hand, red phosphorus exists as \[{{\text{P}}_{\text{4}}}\] tetrahedral units which are joined   together through covalent bonds giving polymeric structure.


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