Class XII Assignment for Unit Test 2

Assignment for unit test-ii AND IInd-TERM,std-xi

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States of Matter and Chemical Equilibrium:

1.A student forgot to add the reaction mixture to the round bottomed flask at 270C but instead he placed the flask on the flame.After a lapse of time , he realized his mistake and using a pyrometer he found the temperature of the flask was 4770C.What fraction of air would have been expelled out?

2. Dihydrogen gas used in Haber’s process is produced by reacting methane from natural gas with high temperature steam. The first stage of two stage reaction involves the formation of CO and H2. In second stage, CO formed in first stage is reacted with more steam in water gas shift reaction,

If a reaction vessel at 400°C is charged with an equimolar mixture of CO and steam such

that 4.0 bar, what will be the partial pressure of H2 at equilibrium?

Kp= 10.1 at 400°C.

3. What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27 °C ?

4. At a certain temperature and total pressure of 105  Pa, iodine vapour contains 40% by

volume of I atoms

Calculate Kp for the equilibrium.

5. What would be the SI unit for the quantity pV2T 2/n?

6. Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the

equilibrium:

for which Kc= 32 at 500 K.If initially pure BrCl is present at a concentration of 3.3 × 10-3 molL-1, what is its molar concentration in the mixture at equilibrium?

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