AIIMS MBBS Entrance Test 2019 Chemistry Paper with Answer & Solutions 25 May First Shift Part 7

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Q-84: The Hybridisation and magnetic behavior of complex is:

(1) , paramagnetic

(2) , diamagnetic

(3) , paramagnetic

(4) , diamagnetic

Answer: (4)

Solution:

No. of is zero

Image of Hybridisation magnetic behavior complex

Image of Hybridisation Magnetic Behavior Complex

Image of Hybridisation magnetic behavior complex

is a strong field ligand .

Electron shift into .

Image of Hybridisation magnetic behavior complex

Image of Hybridisation Magnetic Behavior Complex

Image of Hybridisation magnetic behavior complex

And no. of unpaired

So it has diamagnetic nature.

Q-85: The tetrahedral voids are present in of crystal structure

Options:

(1)

(2)

(3)

(4)

Answer: (4)

Solution:

Q-86: Which element can have oxidation state from 4 to 6?

Options:

(1)

(2)

(3)

(4)

Answer: (4)

Solution:

Oxidation state range (but is less stable)

Oxidation state

Co oxidation state range

Cr oxidation state range (but is more stable)

Q-87: Which of the following statement is incorrect about colloidal solution.

(1) Lyophobic sols are more stable than Lyophobic sols.

(2) Lyophilic colloids have a unique property of protecting lyophobic colloids

(3) Lyophilic colloids are more soluble then lyophobic colloids.

(4) None of these

Answer: (1)

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