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  • For the following Assertion and Reason, the correct option is : Assertion: For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements. Reason: The reactants are most s

For the following Assertion and Reason, the correct option is : Assertion: For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements. Reason: The reactants are most strongly adsorbed on group 7-9 elements.
Option: 1 The assertion is true, but the reason is false.  

Option: 2 Both assertion and reason are true but the reason is not the correct explanation for the assertion.  
 
Option: 3 Both assertion and reason are true but the reason is the correct explanation for the assertion.

Option: 4 Both assertion and reason are false.
 

Answers (1)

best_answer

The metals of groups 7, 8 and 9 do not form hydride. Even from group 6, only chromium forms CrH. These hydrides conduct heat and electricity though not as efficiently as their parent metals do.

"For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements." This statement is wrong as the metals of groups 7, 8 and 9 do not form hydride.

Both assertion and reason are false.

Therefore, Option(4) is correct.

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vishal kumar

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