Single Choice

Transition metals and their compounds catalyses reactions because:

Athey have completely filled $$s-$$subshell
Bthey have a comparable sizes due to poor shielding of $$d-$$subshell
Cthey introduce an entirely new reaction mechanism with a lower activation energy
Correct Answer
Dthey have variable oxidation states which differs by two units

Solution

The transition metals provide alternate reaction pathway which has lower activation energy . Hence, they act as a catalyst.

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

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

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 ?

Contact Details