1
JEE Main 2022 (Online) 25th July Morning Shift
+4
-1

The IUPAC nomenclature of an element with electronic configuration [Rn] $$5 \mathrm{f}^{14} 6 \mathrm{d}^{1} 7 \mathrm{s}^{2}$$ is :

A
Unnilbium
B
Unnilunium
C
D
Unniltrium
2
JEE Main 2022 (Online) 30th June Morning Shift
+4
-1

The correct order of electron gain enthalpy ($$-$$ ve value) is :

A
O > S > Se > Te
B
O < S < Se < Te
C
O < S > Se > Te
D
O < S > Se < Te
3
JEE Main 2022 (Online) 29th June Evening Shift
+4
-1

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : The first ionization enthalpy for oxygen is lower than that of nitrogen.

Reason R : The four electrons in 2p orbitals of oxygen experience more electron-electron repulsion.

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

A
Both A and R are are correct and R is the correct explanation of A.
B
Both A and R are are correct but R is NOT the correct explanation of A.
C
A is correct but R is not correct.
D
A is not correct but R is correct.
4
JEE Main 2022 (Online) 29th June Morning Shift
+4
-1

The electronic configuration of Pt (atomic number 78) is:

A
[Xe] 4f14 5d9 6s1
B
[Kr] 4f14 5d10
C
[Xe] 4f14 5d10
D
[Xe] 4f14 5d8 6s2
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