(C) Ca2+,K+,Ar,Cl−,S2− all species have 18 electrons that's why these are isoelectronic species. (E) Radius order Cs>Rb>K>Na>Li
Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale,…
NEET UG 2025 — Chemistry Inorganic Chemistry
2025mcqmedium
Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale, the electronegativity values of N and Cl are not the same. C. Ar,K+,Cl−,Ca2+, and S2− are all isoelectronic species. D. The correct order of the first ionization enthalpies of Na,Mg,Al, and Si is Si>Al>Mg>Na. E. The atomic radius of Cs is greater than that of Li and Rb . Choose the correct answer from the options given below
Official previous-year question
Held on 30 Apr 2025 · Verified 9 Jul 2026.
Options
- A
A, B and E only
- B
C and E only
- C
C and D only
- D
A, C and E only
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