NEET UG 2009 — Inorganic Chemistry

In which of the following molecules / ions $\mathrm{BF}_3$, $\mathrm{NO}_2^{-}, \mathrm{NH}_2^{-}$and $\mathrm{H}_2 \mathrm{O}$, the central atom is $\mathrm{sp}^2$ hybridized?

In which of the following molecules/ions $\mathrm{BF}_3, \mathrm{NO}_2^{-}, \mathrm{NH}_2^{-}$and $\mathrm{H}_2 \mathrm{O}$, the central atom is $\mathrm{sp}^2$ hybridised ?

Out of $\mathrm{TiF}_6^{2-}$ and $\mathrm{CoF}_6^{3-}, \mathrm{Cu}_2 \mathrm{Cl}_2$ and $\mathrm{NiCl}_4^{2-}$ ( $\mathrm{Z}$ of $\mathrm{Ti}=22, \mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28)$ the colourless species are :

Out of $\mathrm{TiF}_6^{2-}, \mathrm{CoF}_6^{3-}, \mathrm{Cu}_2 \mathrm{Cl}_2$ and $\mathrm{NiCl}_4^{2-}$ ( $\mathrm{Z}$ of $\mathrm{Ti}=22, \mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28$ ) the colourless species are

The stability of +1 oxidation state increases in the sequence

The state of hybridisation of $\mathrm{C}_2, \mathrm{C}_3, \mathrm{C}_5$ and $\mathrm{C}_6$ of the hydrocarbon,  is in the following sequence

The straight chain polymer is formed by

What is the dominant intermolecular force or bond that must be overcome in converting liquid $\mathrm{CH}_3 \mathrm{OH}$ to a gas -

What is the dominant intermolecular force or bond that must be overcome in converting liquid $\mathrm{CH}_3 \mathrm{OH}$ to a gas ?

Which of the following complex ions is expected to absorb visible light ? (At no. $\mathrm{Zn}=30, \mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{Cr}=24$ )

Which of the following complex ions is expected to absorb visible light ? (At. no. $\mathrm{Zn}=30, \mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{Cr}=24$ )

Which of the following does not show optical isomerism - (en = Ethylenediamine)

Which of the following does not show optical isomerism? (en = ethylenediamine)

Which of the following molecules acts as a Lewis acid ?

Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states ?