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प्रश्न
Which of the following characteristics of transition metals is associated with their catalytic activity?
पर्याय
Paramagnetic nature
Colour of hydrated ions
High enthalpy of atomisation
Variable oxidation states
उत्तर
Variable oxidation states
Explanation:
Transition metals have a tendency to have varying oxidation states, which allows them to create unstable intermediates and provide a novel reaction path with a lower Ea. As a result, transition metals have catalytic activity.
संबंधित प्रश्न
In 3d series (Sc to Zn), which element has the lowest enthalpy of atomisation and why?
Account for the following :
Zn is not considered as a transition element.
Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?
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:
Electronic configurations
Dissociation of H2S is suppressed in acidic medium.
Which of the following statements is not correct?
Transition elements show magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost same spin only magnetic moment?
(i) \[\ce{Co^{2+}}\]
(ii) \[\ce{Cr^{2+}}\]
(iii) \[\ce{Mn^{2+}}\]
(iv) \[\ce{Cr^{3+}}\]
Which of the following species has maximum magnetic momentum?
What is the oxidation state of chromium in chromate ion and dichromate ion?
Why are interstitial compounds well known for transition metals?
