Case Study Questions for Class 11 Chemistry Chapter 9 Hydrogen

Case Study Questions for Class 11 Chemistry Chapter 9 Hydrogen

Case Study/Passage Based Questions:

Question 1:

Read the passage carefully and answer the questions given below.

Depletion of resources of fossil fuels will at some future time make hydrogen, either for use directly by combustion and electrochemically in fuel cells or indirectly via hydrogenation of coal, the major alternative to nuclear energy; hence arises the current interest in the so-called hydrogen economy.

A thermochemical cycle for hydrogen production involves at least one element that can exist in two different oxidation states.

               2H₂O → 2H₂ + O₂

(i) Production of H₂ from H₂O requires a net input of energy that would come from –
(A) nuclear source
(B) solar source
(C) both of these 
(D) none of these

(ii) In the above thermochemical cycle, FeCl₂ is one of the catalysts involved and thus regenerated at the end of the reaction, after formed into –

(A) FeCl₃, FeO, Fe₂O₃       

(B) FeCl₃, Fe₂O₃, Fe₃O₄    

(C) FeCl₃, FeO                                                                

(D) FeCl₃, Fe₃O₄                                                             

(iii) H₂ is produced in the following thermochemical reaction –

(A) FeCl₂ + H₂O →            

(B) Fe₃O₄ + Cl₂ + HCl →  

(C) FeO + H₂O →                                                  

(D) FeCl₃ + H₂O →                       

➤ Show Answer

Answer: (i) C (ii) D (iii) A

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