CBSE Set Set3 Chemistry Sample Test Papers For Class 12th for students online
Chemistry Class - XII (CBSE)
You are on questions of Set III
(Only those questions are given , which are different from Set I
and Set II )
Q 2 Which one out of O+2
and O-2 is more stable. (1 mark)
Q 5 How is the unit of molar conductivity
arrived at ? (1 mark)
Q 6 Which one among the following is
strongest oxidising agent : (1 mark)
ClO4-, BrO4-, IO4-
Q 12 The solubility of Ba(OH)2.8H2O
in water at 288k is 5.6g per 100g of water. What is the morality of the
hydroxide ions in the saturated solution of Barium hydroxide at 288k? (Atomic
mass : Ba=137, O=16, h=1) (2 marks)
Q 16 Consider the following data for the reaction: A + B ----- Products
| run | Initial Concentration | Initial Concentration | Initial rate(mols-1) | |||
| A | B | |||||
| 1 | 0.10M | 1.0M | 2.1x10-3 | |||
| 2 | 0.20M | 1.0M | 8.4x10-3 | |||
| 3 | 0.20M | 2.0M | 8.4x10-3 |
Q 18 What are lipids? Describe their two main function. (2 marks)
Q 19 Mention
which of the following are addition polymer : (i) Terylone (ii) Nylon-66
(iii) Neoprene (iv) Teflon (2 marks)
Q 24 Write an ionic equation to
represent the oxidising action of Cr2O72-
in acidic medium. Also draw a structure of Cr2O72-
(2 marks)
Q 27 (a) The standard potential are
given as : EoCu+2/Cu = 0.34 V and EoAg+/Ag
= 0.80 V
Calculate the cell potential(E) for the cell containing 0.100M Ag+
and 4.00 M Cu+2 at 298K.
(b) How many hours does it take to reduce 3 mol of Fe3+ to Fe2+
with 2.00 a current?
(R = 8.314 JK-1 ; F = 96,500 C mol-1) (3 marks)
Q 29 A wood piece from an archaeological source shows a 140C
activity which is 10% of the activity found in green wood. Calculate the
age of the wood piece. (tt1/214C = 5770 years). (3
marks )