1
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

For elements $$\mathrm{B}, \mathrm{C}, \mathrm{N}, \mathrm{Li}, \mathrm{Be}, \mathrm{O}$$ and $$\mathrm{F}$$, the correct order of first ionization enthalpy is

A
$$\mathrm{Li}<\mathrm{Be}<\mathrm{B}<\mathrm{C}<\mathrm{O}<\mathrm{N}<\mathrm{F}$$
B
$$\mathrm{B}>\mathrm{Li}>\mathrm{Be}>\mathrm{C}>\mathrm{N}>\mathrm{O}>\mathrm{F}$$
C
$$\mathrm{Li}<\mathrm{Be}<\mathrm{B}<\mathrm{C}<\mathrm{N}<\mathrm{O}<\mathrm{F}$$
D
$$\mathrm{Li}<\mathrm{B}<\mathrm{Be}<\mathrm{C}<\mathrm{O}<\mathrm{N}<\mathrm{F}$$
2
JEE Main 2023 (Online) 10th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$

Assertion A : The energy required to form $$\mathrm{Mg}^{2+}$$ from $$\mathrm{Mg}$$ is much higher than that required to produce $$\mathrm{Mg}^+$$

Reason $$\mathbf{R}: \mathrm{Mg}^{2+}$$ is small ion and carry more charge than $$\mathrm{Mg}^{+}$$

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

A
A is false but R is true
B
Both A and R are correct but R is NOT the correct explanation of A
C
Both A and R are correct and R is the correct explanation of A
D
A is true but R is false
3
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct order of electronegativity for given elements is:

A
$$ \mathrm{C}>\mathrm{P}>\mathrm{At}>\mathrm{Br}$$
B
$$\mathrm{Br}>\mathrm{C}>\mathrm{At}>\mathrm{P}$$
C
$$\mathrm{Br}>\mathrm{P}>\mathrm{At}>\mathrm{C}$$
D
$$\mathrm{P}>\mathrm{Br}>\mathrm{C}>\mathrm{At}$$
4
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which one of the following elements will remain as liquid inside pure boiling water?

A
Li
B
Br
C
Cs
D
Ga
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