CBSE Set Set3 Chemistry Sample Test Papers For Class 12th for students online

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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  
Determine the order of reaction with respect to A and with respect to B, and the over all order of the reaction. (2 marks)


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 )

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