JEE Main Test 40

Result

JEE Main Test 40

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

The geometry of Ni(CO)₄ and Ni(PH₃)₄ CI₂ are

A
both square planar

B
both tetrahedral

C
tetrahedral and square planar

D
square planar and tetrahedral

Solution

Ni: 3d⁸ 4s²:
Under the influence of strong ligand CO in Ni(CO)₄:3d¹⁰-sp³ hybridization (tetrahedral)
Ni(PH₃)Cl₂, Ni²⁺ : 3d⁸ - dsp² hybridization (2 electrons in 3d are forced to be paired up by strong ligand PH₃)
Question 2
4 / -1

Which is true about the acidic character of hydroxyl groups of sugar and hydroxyl group of an alcohol?

A
The hydroxyls of sugars are more acidic than that of a typical alcohol.

B
The hydroxyls of sugars are less acidic than that of a typical alcohol.

C
Both have similar acidic character.

D
The hydroxyls of sugars are neutral while that of an alcohol is acidic.

Solution

The OH's of sugars are more acidic than that of a typical alcohol because of their mutual electron-withdrawing inductive effect.