P2O5 is a hygroscopic powder which sublimes at______________?

Related Mcqs:

1. Bleaching powder is not used for bleaching________________?

   A. Cotton
   B. Costly fabrics
   C. Linen
   D. Paper pulb

2. Bleaching powder is an example of________________?

   A. Normal salt
   B. Double salt
   C. Mixed salt
   D. Complex

3. Phosphorus is a Greek word and it means_________________?

   A. Light bearing
   B. Fire
   C. Impure
   D. Tetrahedral

4. Allotropic form of phosphorus that is poisonous is___________________?

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

5. The chemical composition of cinnabar is__________________?

   A. ZnS
   B. PbS
   C. HgS
   D. FeS

6. Oxygen and sulphur resemble in all except________________?

   A. Electronic conviguration of valence shell electrons
   B. Show allotropy
   C. Polymeric
   D. Show same oxidation state

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

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

8. Which one of following is not a property of pure quartz ?

   A. Coloured solid
   B. Brittle
   C. Hard
   D. All of above

9. The element of group VIA which is a non-metal is________________?

   A. S
   B. Se
   C. Te
   D. Po

10. Which of the elements show passivity when treated with conc. HNO3?

    A. Fe
    B. A
    C. Cr
    D. All of the above