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Assertion (A) Elementary phosphorus exis...

Assertion (A) Elementary phosphorus exists in three principal allotropic forms , ie .white (or yellow),red (or violet ) and black.
Reason (R ) Of the three forms, white phosphorus is the most important and most reactive.

A

White P

B

Red P

C

Black P

D

Scarlet P

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Phosphorus has three allotropic forms : (i) white phosphorus (ii) red phosphorus and (iii) black phosphorus. Write the difference between white and red phosphorus on the basis of their structure and reactivity.

Phosphorus has three allotropic forms : (i) white phosphorus (ii) red phosphorus and (iii) black phosphorus. Write the difference between white and red phosphorus on the basis of their structure and reactivity.

Knowledge Check

  • Assertion. Elementary phosphorus exists in three principal allotropic forms, i.e., white (yellow), red (or violet) and black. Reason. Of the three forms, white phosphorus is the most important and most reactive.

    A
    If both assertion and reason are true, and reason is the correct explanation of the assertion.
    B
    If both assertion and reason are ture, but reason is not the correct explanantion of the assertion.
    C
    If assertion is true, but reason is false.
    D
    If both assertion and reason are false

  • Assertion. Elementary phosphorus exists I three principal allotrpic forms, i.e., white (yellow), red (or violte) and black. Reason. Of the three forms, white phosphorus is the most important and most reactive.

    A
    If both assertion and reason are true, and is the correct explanation of the assertion.
    B
    If both assertion and reason are true, but reason is not the correct explanation of the assertion.
    C
    If assertion is true, but reason is false.
    D
    If both assertion and reason are false

  • Which allotropic form of phosphorus is most reactive?

    A
    Red phosphorus
    B
    White phosphorus
    C
    Scarlet phosphorus
    D
    Violet phosphorus

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    Give reasons for the following: White phosphorus is much more reactive than red phosphorus.

    Important allotropic forms of phosphorus are white phosphorus, red phosphorus and black phosphorus. Among these which allotropic form is more reactive ? Why ?

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    Which is the most thermodynamically stable allotropic form of phosphorus ?

    Assertion (A) : Ortho phosphoric acid is tribasic acid Reason (R) : Orthophosphoric acid forms three series of salts.

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