Catalyst and Catalysis
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CHXII05:SURFACE CHEMISTRY

320689 Which is false for catalyst?

1 A catalyst can initiate a reaction
2 It does not alter the position of equilibrium in a reversible reaction
3 A catalyst remains unchanged in quality and composition at the end of reaction
4 Catalysts are sometimes very specific in respect of a reaction
CHXII05:SURFACE CHEMISTRY

320690 \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COCl + }}{{\text{H}}_{\text{2}}}\xrightarrow[{{\text{quinoline}}}]{{{\text{Pd/ BaS}}{{\text{O}}_{\text{4}}}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}, {\rm{here,}} {\rm{BaS}}{{\rm{O}}_{\rm{4}}} \,\,{\rm{acts}} \,\,{\rm{as}}\)

1 Positive catalyst
2 Catalyst poison
3 Promoter
4 Medium
CHXII05:SURFACE CHEMISTRY

320691 In a reversible reaction, a catalyst:

1 increases the rate of the forward reaction only
2 increases the rate of the forward reaction to a greater extent than that of the backward reaction
3 increases the rate of the forward reaction and decreases that of the backward reaction to different extent
4 increases the rate of the forward and backward reactions equally
CHXII05:SURFACE CHEMISTRY

320692 Assertion :
Tetraethyl lead minimises the knocking effect when mixed with petrol.
Reason :
Because tetraethyl lead acts as a negative catalyst.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
NEET DIGITAL LIBRARY
CHXII05:SURFACE CHEMISTRY

320689 Which is false for catalyst?

1 A catalyst can initiate a reaction
2 It does not alter the position of equilibrium in a reversible reaction
3 A catalyst remains unchanged in quality and composition at the end of reaction
4 Catalysts are sometimes very specific in respect of a reaction
CHXII05:SURFACE CHEMISTRY

320690 \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COCl + }}{{\text{H}}_{\text{2}}}\xrightarrow[{{\text{quinoline}}}]{{{\text{Pd/ BaS}}{{\text{O}}_{\text{4}}}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}, {\rm{here,}} {\rm{BaS}}{{\rm{O}}_{\rm{4}}} \,\,{\rm{acts}} \,\,{\rm{as}}\)

1 Positive catalyst
2 Catalyst poison
3 Promoter
4 Medium
CHXII05:SURFACE CHEMISTRY

320691 In a reversible reaction, a catalyst:

1 increases the rate of the forward reaction only
2 increases the rate of the forward reaction to a greater extent than that of the backward reaction
3 increases the rate of the forward reaction and decreases that of the backward reaction to different extent
4 increases the rate of the forward and backward reactions equally
CHXII05:SURFACE CHEMISTRY

320692 Assertion :
Tetraethyl lead minimises the knocking effect when mixed with petrol.
Reason :
Because tetraethyl lead acts as a negative catalyst.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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CHXII05:SURFACE CHEMISTRY

320689 Which is false for catalyst?

1 A catalyst can initiate a reaction
2 It does not alter the position of equilibrium in a reversible reaction
3 A catalyst remains unchanged in quality and composition at the end of reaction
4 Catalysts are sometimes very specific in respect of a reaction
CHXII05:SURFACE CHEMISTRY

320690 \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COCl + }}{{\text{H}}_{\text{2}}}\xrightarrow[{{\text{quinoline}}}]{{{\text{Pd/ BaS}}{{\text{O}}_{\text{4}}}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}, {\rm{here,}} {\rm{BaS}}{{\rm{O}}_{\rm{4}}} \,\,{\rm{acts}} \,\,{\rm{as}}\)

1 Positive catalyst
2 Catalyst poison
3 Promoter
4 Medium
CHXII05:SURFACE CHEMISTRY

320691 In a reversible reaction, a catalyst:

1 increases the rate of the forward reaction only
2 increases the rate of the forward reaction to a greater extent than that of the backward reaction
3 increases the rate of the forward reaction and decreases that of the backward reaction to different extent
4 increases the rate of the forward and backward reactions equally
CHXII05:SURFACE CHEMISTRY

320692 Assertion :
Tetraethyl lead minimises the knocking effect when mixed with petrol.
Reason :
Because tetraethyl lead acts as a negative catalyst.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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CHXII05:SURFACE CHEMISTRY

320689 Which is false for catalyst?

1 A catalyst can initiate a reaction
2 It does not alter the position of equilibrium in a reversible reaction
3 A catalyst remains unchanged in quality and composition at the end of reaction
4 Catalysts are sometimes very specific in respect of a reaction
CHXII05:SURFACE CHEMISTRY

320690 \({\text{C}}{{\text{H}}_{\text{3}}}{\text{COCl + }}{{\text{H}}_{\text{2}}}\xrightarrow[{{\text{quinoline}}}]{{{\text{Pd/ BaS}}{{\text{O}}_{\text{4}}}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}, {\rm{here,}} {\rm{BaS}}{{\rm{O}}_{\rm{4}}} \,\,{\rm{acts}} \,\,{\rm{as}}\)

1 Positive catalyst
2 Catalyst poison
3 Promoter
4 Medium
CHXII05:SURFACE CHEMISTRY

320691 In a reversible reaction, a catalyst:

1 increases the rate of the forward reaction only
2 increases the rate of the forward reaction to a greater extent than that of the backward reaction
3 increases the rate of the forward reaction and decreases that of the backward reaction to different extent
4 increases the rate of the forward and backward reactions equally
CHXII05:SURFACE CHEMISTRY

320692 Assertion :
Tetraethyl lead minimises the knocking effect when mixed with petrol.
Reason :
Because tetraethyl lead acts as a negative catalyst.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
NEET DIGITAL LIBRARY