chemistry cbse 12th

  QUESTION 1:

    When cl2 gas reacts with hot and concentrated sodium hydroxide solution , the oxidation        number of chlorine change from

       ANS : Zero to-1 and Zero to +5

 QUESTION 2:

    which of the following contain P-0-P bond?

      

      ANS:  Pyrophosphoric acid.

QUESTION 3:

    Among the following which is the strongest oxidizing agent?

      

     ANS: F2

 QUESTION 4:

   Boran shows diagonal relation with

    ANS: Si

 QUESTION 5:

     Catenation property is maximum in

       ANS: Carbon.

 QUESTION 6:

     The shape of XeF4 is 

       ANS: Square planar.

 

 QUESTION 7:

        Sulphur molecule is

        ANS: Octa atomic.

 QUESTION 8:

        on electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained            at the anode will be

           ANS:  oxygen

 QUESTION 9:

           An increase in equivalent conductance of a strong electrolyte with the dilution is                      mainly  due to

                 ANS: increase in ionic mobility of ions.

 QUESTION 10:

         The highest electrical conductivity of the following aqueous solution is of 

                  ANS: 0.1 M di fluoro acetic acid