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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Mention any three processes where transition metals act as catalysts.

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प्रश्न

Mention any three processes where transition metals act as catalysts.

दीर्घउत्तर
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उत्तर

(i) Vanadium (V) oxide in contact process for oxidation of \[\ce{SO2}\] to \[\ce{SO3}\].

(ii) Finely divided iron in Haber’s process in conversion of \[\ce{N2}\] and \[\ce{H2}\] to \[\ce{NH3}\].

(iii) \[\ce{MnO2}\] in preparation of oxygen from \[\ce{KClO3}\].

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अध्याय 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [पृष्ठ ११५]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 70.(b) | पृष्ठ ११५

संबंधित प्रश्न

Account for the following:

Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4.


Account for the following: 

Cr2+ is a strong reducing agent.


Account for the following:

Zn is not considered as a transition element.


Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.


How would you account for the following? 

Transition metals and their compounds act as catalysts.


Complete and balance the following chemical equations

`MnO_4^(-) + H_2O + I^(-) ->`


Why do transition metal ions possess a great tendency to form complexes?


Which is the most stable oxidation state of iron?


Electronic configuration of Mn2+ is ____________.


Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?


The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why?


The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?


Identify the metal and justify your answer.

Carbonyl \[\ce{M(CO)5}\]


Identify the metal and justify your answer.

\[\ce{MO3F}\]


Transition metals can act as catalysts because these can change their oxidation state. How does \[\ce{Fe(III)}\] catalyse the reaction between iodide and persulphate ions?


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Agcl is soluble in NH4OH. The solubility is due to the information of:-


What is the oxidation state of chromium in chromate ion and dichromate ion?


Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:

Oxidation states


Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:

Ionisation enthalpies


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