Single Choice

The catalystic activity of transition metals and their compounds is ascribed mainly to:

Atheir unfilled d-orbitals
Btheir ability of adopt variable oxidation states
Correct Answer
Ctheir chemical reactivity
Dtheir magnetic behaviour

Solution

The catalytic activity of transition metals and their compounds is ascribed mainly due to their ability to adopt variable oxidation states.

Examples: $$\overset { +5 }{ { V }_{ 2 } } {O}_{5}$$, $$\overset { +3 }{ { V }_{ 2 } } {O}_{3}$$

$$2{SO}_{2}+{O}_{2} \xrightarrow [ ]{ { V }_{ 2 }{ O }_{ 5 } } 2{SO}_{3}$$

SIMILAR QUESTIONS

d - block and f - block Elements

Cobalt (60) isotope is used in the treatment of:

d - block and f - block Elements

Identify the incorrect statement.

d - block and f - block Elements

The basic character of the transition metal monoxides follows the order: (Atomic nos. Ti = 22, V = 23, Cr = 24, Fe = 26)

d - block and f - block Elements

Technetium, the element below manganese in the Periodic Table, would be expected to have high values for its: $$(I)$$ melting point $$(II)$$ boiling point $$(III)$$ density

d - block and f - block Elements

Oxygen is absorbed by molten silver, which is evolved on cooling and the silver particles are scattered. This phenomenon is known as:

d - block and f - block Elements

Transition metals and their compounds catalyses reactions because:

d - block and f - block Elements

Catalytic activity of transition metals depends on:

d - block and f - block Elements

The magnetic moment of a transition metal ion is found to be $$3.87$$ Bohr Magneton (BM). The number of unpaired electrons present in it is:

d - block and f - block Elements

Corrosive sublimate is:

d - block and f - block Elements

Which of the following is arranged in order of increasing melting point ?

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