Chemistry 12th cbse

 QUESTION 1:

   EDTA is used for the estimation of

     ANS: Ca2+ and Mg2+ions.

QUESTION 2:

  The solution of the complex [Cu(NH3)4]So4 in water will

    ANS: give the tests of So4 2- ions.

QUESTION 3:

   which of the following shall form an octahedral complex

    ANS: d8 (high spin)

QUESTION 4:

  which of the following has magnesium

    ANS: chlorophll

QUESTION 5:

   Which of the following has square plannar structure

   ANS: [Ni(CN)4]2-

QUESTION 6:

   The reaction, 3Cl0-(aq)---> Clo3(aq) + 2Cl2- (aq) is an example of

   ANS: dis proportionation reaction

QUESTION 7:

  In a galvanic cell

   ANS: chemical energy is converted into electricity

QUESTION 8:

   Flourineis the best oxidising agent because it has

   ANS: Highest E* reduction.

QUESTION 9:

   The reaction that takes place at anode is

    ANS: oxidtion

QUESTION 10:

   Molten sodium choloride conducts electricity due to the presence

   ANS:  free ions