Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?

Related Mcqs:

1. Phosphoric acid is a weak acid and its basicity is____________________?

   A. 1
   B. 3
   C. zero
   D. 2

2. Which of the following will give phosphoric acid one reaction with water_________________?

   A. PCI5
   B. P2O3
   C. P2O5
   D. All of the above

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

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

4. When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?

   A. 0.5
   B. 1
   C. 1.5
   D. 2

5. Nitrates of which pair of elements give different products on thermal decomposition ?

   A. Na K
   B. Mg Ca
   C. Li Na
   D. Li Ca

6. Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____

   A. 500⁰C
   B. 700⁰C
   C. 900⁰C
   D. 1300⁰C

   Submitted by: Aamir khan Hullio

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

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

8. Which allotropic form of phosphorous is the most stable ?

   A. White
   B. black
   C. red
   D. Violet

9. When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?

   A. an acid
   B. a dehydrating agent
   C. an oxidizing agent
   D. as sulphonating agent

10. When alcohol reacts with phosphorous halides it geive____________________?

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