Which allotropic form of phosphorous is the most stable ?

Related Mcqs:

1. Allotropic form of phosphorus that is poisonous is___________________?

   A. White
   B. Red
   C. Black
   D. Violet

2. The most reactive allotropic form of phosphorus is________________?

   A. White
   B. Redox potential
   C. Black
   D. Violet

3. Bucky balls is an allotropic from of__________________?

   A. Sulphur
   B. Carbon
   C. Silica
   D. Tin

4. __________ is one of the allotropic modifications of carbon.

   A. Silicon
   B. Diamond
   C. Iodine
   D. Graphite

   Submitted by: Shumail Farhan

5. Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?

   A. Phosphine
   B. Phosphorus
   C. Water
   D. Phosphorus pentoxide

6. Phosphene gas will be produced if phosphorous acid is subjected to___________________?

   A. Oxidation
   B. Reduction
   C. Decomposition
   D. Both b & c

7. Carboxylic acid on reduction with HI / phosphorous yields_________________?

   A. alkane
   B. alcohols
   C. aldehydes
   D. ketones

8. When alcohol reacts with phosphorous halides it geive____________________?

   A. alkyl halides
   B. alkyl amine
   C. alkanes
   D. alkynes

9. Oxidation state +1 for phosphorous is found in___________?

   A. H3PO3
   B. H3PO4
   C. H3PO2
   D. H2P2O7

   Submitted by: Muhammad Ali Kunbhar

10. Carbonates of lithium are not stable like that of sodium due to________________?

    A. Low electronegativity
    B. Low electropositivity
    C. Low charge density
    D. Not known yet