A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ K^-1 As a result of combustion reaction, the temperature of the calorimeter is increased by 5 K . The magnitude of the heat of combustion of octane at constant volume is ____ kJmol^-1 (nearest integer).

1 mole of K₂Cr₂O₇ cannot oxidise
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20mL of 0.02 M hypo solution is used for the titration of 10mL of copper sulphate solution, in the presence of excess of KI using starch as an indicator. The molarity of Cu²⁺ is found to be__________× 10^-2 M. [nearest integer]

Given: 2Cu²⁺ + 4I^- ® Cu₂I₂ + I₂

 I₂ + <!-- [if gte mso 9]><xml> </xml><![endif]-->  $2S_2{O}_3^{2-}\to 2I^{-}+S_4{O}_6^{2-}$