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Standard XII
Chemistry
Colour
Transition el...
Question
Transition elements are coloured due to
A
Small size
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B
Metallic nature
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C
unpaired d –
e
−
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D
All
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Solution
The correct option is
C
unpaired d –
e
−
Due to unpaired
e
−
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Similar questions
Q.
Transition metals are coloured due to the following electronic transition
Q.
Transition metal compounds are usually coloured. This is due to the electronic transition :
Q.
Explain with reasons:
(i) Transition elements show variable oxidation states.
(ii) Transition elements form coloured compounds.
(iii) The size of Lanthanide elements decreases from La to Lu.
Q.
Assertion :The purple colour of
K
M
n
O
4
is due to the charge transfer transition. Reason: The intense colour in most of the transition metal complexes is due to
d
−
d
transition.
Q.
Pick false statements from the following.
(a) The left side of the periodic table consists of the most electronegative elements and the right side of the table consist of the most electropositive elements.
(b) Paramagnetic nature, variable oxidation states, coloured compounds are exhibited by transition elements.
(c) Alkalis and alkaline earth metals react with water, liberating oxygen.
(d) Elements with a more metallic character form acidic oxides and with more non-metallic character form basic oxides.
(e) Melting and boiling points of metals and non-metals increase and decrease respectively along with a group.
(f) Elements belonging to groups IA-VIIA are called representative elements.
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