JEE Main 2021 (Online) 22th July Evening Shift | Periodic Table & Periodicity Question 93 | Chemistry

The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. The elements X, Y and Z, respectively, are :

neon, sodium and chlorine

argon, chlorine and sodium

chlorine, lithium and sodium

argon, lithium and sodium

JEE Main 2021 (Online) 18th March Morning Shift

MCQ (Single Correct Answer)

-1

The ionic radius of Na⁺ ions is 1.02 $$\mathop A\limits^o $$. The ionic radii (in $$\mathop A\limits^o $$) of Mg²⁺ and Al³⁺, respectively, are

1.05 and 0.99

0.72 and 0.54

0.85 and 0.99

0.68 and 0.72

JEE Main 2021 (Online) 17th March Morning Shift

MCQ (Single Correct Answer)

-1

The absolute value of the electron gain enthalpy of halogens satisfies :

Cl > Br > F > I

Cl > F > Br > I

I > Br > Cl > F

F > Cl > Br > I

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