1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

If first ionization enthalpies of elements X and Y are 419 kJ mol$$-$$1 and 590 kJ mol$$-$$1, respectively and second ionization enthalpies of X and Y are 3069 kJ mol$$-$$1 and 1145 kJ mol$$-$$1, respectively. Then correct statement is :

A
Both X and Y are alkaline earth metals
B
X is an alkali metal and Y is an alkaline earth metal
C
X is an alkaline earth metal and Y is an alkali metal
D
Both X and Y are alkali metals
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The incorrect statement about denaturation of proteins is :

A
Uncoiling of the helical structure takes place
B
It results due to change of temperature and/or pH
C
It results in loss of biological activity of proteins
D
A protein is formed from amino acids linked by peptide bonds
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus

Four gas cylinders containing He, N2, CO2 and NH3 gases separately are gradually cooled from a temperature of 500 K. Which gas will liquify first?

(Given Tc in K $$-$$ He : 5.3, N2 : 126, CO2 : 304.1 and NH3 : 405.5)

A
NH3
B
He
C
N2
D
CO2
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : The metal carbon bond in metal carbonyls possesses both $$\sigma$$ and $$\pi$$ character.

Reason (R) : The ligand to metal bond is a $$\pi$$ bond and metal to ligand bond is a $$\sigma$$ bond.

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

A
(A) is not correct but (R) is correct
B
Both (A) and (R) are correct and (R) is the correct explanation of (A)
C
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
D
(A) is correct but (R) is not correct
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