The most stable allotropic form of phosphorous is the _________________ phosphorous?

Related Mcqs:

1. The most reactive allotropic form of phosphorus is __________________ phosphorus?

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

2. Which form of sulphur is the most stable at room temperature ?

   A. Plastic
   B. Monoclinic
   C. Rhombic
   D. Flowers of sulphur

3. White phosphorous is stored under water, because __________________?

   A. It does not react with water
   B. It is poisonous
   C. Its kindling temperature in dry air is very low
   D. It is unstable

4. Pure rectified spirit contains about _________________ percent alcohol?

   A. 45
   B. 70
   C. 95
   D. 99.5

5. The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________?

   A. Dilute H2SO4
   B. Oleum
   C. Ultraviolet light
   D. None of these

6. Sucrose content in the raw juice extracted from sugar cane is about _________________ percent?

   A. 1 – 2
   B. 15 – 20
   C. 50 – 60
   D. 80 – 85

7. Isopropyl benzene produced by alkylation of benzene with propylene is known as _________________?

   A. Neoprene
   B. Cumene
   C. Gelatin
   D. Mercaptans

8. Phthalic anhydride is produced by the oxidation of _________________?

   A. Naphthalene
   B. Benzene
   C. Toluene
   D. Aniline

9. Bakelite is _________________?

   A. Same as Polytetrafluoroethylene (PTFE)
   B. An inorganic polymer
   C. Same as thermosetting phenol-formaldehyde
   D. Not a polymer

10. Trinitro-toluene (TNT) is _________________ ?

    A. Used in glycerine manufacture
    B. An explosive
    C. Used in dye manufacture
    D. None of these