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Periodic Table

NEET level, single correct, medium

2 of 2

Question 2 of 2

Which of the following has the smallest ionic radius?

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Answer: (C) $Al^{3+}$

Isoelectronic species: higher nuclear charge pulls electron cloud closer.

Al^{3+}

(

Z=13

) has the smallest radius.

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NEET 2025 question paper (Code 45)

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More Chemistry practice

Periodic TableThe correct order of first ionization enthalpy for group 15 elements is:
Chemical BondingAccording to Molecular Orbital Theory, which of the following species has the highest bond order?
Coordination CompoundsThe magnetic moment of $[Fe(CN)_6]^{3-}$ complex ion according to spin-only formula is approximately:
Organic ChemistryToluene on reaction with $CrO_2Cl_2$ in $CS_2$ followed by hydrolysis gives benzaldehyde. This reaction is known as:
Chemical KineticsFor a first order reaction, the time required for $99.9\%$ completion is related to its half-life $t_{1/2}$ by:
ThermodynamicsA reaction is spontaneous at all temperatures if:

NEET Chemistry practice question on Periodic Table, with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.