NEET UG 2007 — Inorganic Chemistry

Which of the following ionic species has the greatest proton affinity to form stable compound?

In which of the following pairs, the two species are iso-structural?

Identify the incorrect statement among the following:

Which of the following oxidation states are the most characteristics for lead and tin respectively?

The correct $\mathrm{C}-\mathrm{O}$ bond length among $\mathrm{CO}, \mathrm{CO}_3^{-2}, \mathrm{CO}_2$ is:

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Identify the correct order of the size of the following:

The $d$ electron configuration of $\mathrm{Cr}^{2+}$, $\mathrm{Mn}^{2+}, \mathrm{Fe}^{2+}$ and $\mathrm{Ni}^{2+}$ are $3 \mathrm{~d}^4, 3 \mathrm{~d}^5, 3 \mathrm{~d}^6$ and $3 \mathrm{~d}^8$ respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour? (At. No. $\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Ni}=$ 28)

Which of the following anions is present in the chain structure of silicates?

Which of the following will give a pair of enantiomers?

With which of the following electronic configuration an atom has the lowest ionisation enthalpy?

Which one of the following ions is the most stable in aqueous solution? (At No. $\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=$ 25)