1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Gadolinium has a low value of third ionisation enthalpy because of

A
small size
B
high exchange enthalpy
C
high electronegativity
D
high basic character
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?

A
CIF3
B
IF5
C
SF4
D
XeF2
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Which of the following statement is not correct about diborane?

A
There are two 3-centre-2-eletron bonds.
B
The four terminal B-H bonds are two centre two electron bonds.
C
The four terminal Hydrogen atoms and the two Boron atoms lie in one plane.
D
Both the Boron atoms are sp2 hybridised.
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Given below are two statements :

Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions.

Statement II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding.

In the light of the above statements, choose the most appropriate answer from the given below

A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct but Statement II is incorrect
D
Statement I is incorrect but Statement II is correct
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