The D And F Block Elements

Chemistry
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Which of the following arrangements does not represent the correct order of the property stated against it? 

A
: Ionic size
B
: Stability in aqueous solution
C
: Number of oxidation states
D
: Paramagnetic behaviour
Medium
JEE Mains
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The actinoids exhibit more oxidation states in general than the lanthanoids. This is because:

A
the 5f orbitals are more buried than the 4f orbitals.
B
there is a similarity between 4f and 5f orbitals in their angular part of the wave function.
C
the actinoids are more reactive than the lanthanoids.
D
the 5f orbitals extend further from the nucleus than the 4f orbitals.
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Match the catalysts to the correct processes:

Catalyst                             Process
A. i. Wacker process
B. ii. Ziegler - Natta polymerization
C. iii. Contact process
D. iv. Deacon's process

A
(A) - (iii), (B) - (ii), (C) - (iv), (D) - (i)
B
(A) - (ii), (B) - (i), (C) - (iv), (D) - (iii)
C
(A) - (ii), (B) - (iii), (C) - (iv), (D) - (i)
D
(A) - (iii), (B) - (i), (C) - (ii), (D) - (iv)
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The transition metal ions responsible for color in Ruby and Emerald are, respectively :

A
and
B
and
C
and
D
and
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Assertion

For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7 - 9 elements.

Reason

The reactants are most strongly adsorbed on group 7 - 9 elements.

A
Both assertion and reason are true and the reason is not the correct explanation for the assertion.
B
Both assertion and reason are true and the reason is the correct explanation for the assertion.
C
Both assertion and reason are false.
D
Assertion is true, but reason is false.
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The correct order of spin-only magnetic moments among the following is:

(Atomic number: .

A
B
C
D
Medium
JEE Mains
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The larger number of oxidation states are exhibited by the actinides than those by lanthanoids, the main reason being:

A
more energy difference between 5f and 6d than between 4f and 5d orbitals
B
more reactive nature of the actinoids than the lanthanoids
C
4f orbitals more diffused than the 5f orbitals
D
lesser energy difference between 5f and 6d than between 4f and 5d orbitals
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