NEET UG 2011 — Inorganic Chemistry

Which of the following statements is incorrect?

Which of the following compounds has the lowest melting point?

Which of the following oxide is amphoteric?

For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order? (At. no. $\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27$ )

Which of the following complex compounds will exhibit highest paramagnetic behaviour? (At. no. : $\mathrm{Ti}=22, \mathrm{Cr}=24$, $\mathrm{Co}=27, \mathrm{Zn}=30$ )

If $n=6$, the correct sequence for filling of electrons will be

The correct order of increasing bond length of $\mathrm{C}-\mathrm{H}, \mathrm{C}-\mathrm{O}, \mathrm{C}-\mathrm{C}$ and $\mathrm{C}=\mathrm{C}$ is

What is the value of electron gain enthalpy of $\mathrm{Na}^{+}$if $\mathrm{IE}_1$ of $\mathrm{Na}=5.1 \mathrm{eV}$ ?

Name the type of the structure of silicate in which one oxygen atom of $\left[\mathrm{SiO}_4\right]^{4-}$ is shared?

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

Which of the two ions from the list given below, have the geometry that is explained by the same hybridisation of orbitals, $\mathrm{NO}_2^{-}, \mathrm{NO}_3^{-}, \mathrm{NH}_2^{-}, \mathrm{NH}_4^{+}, \mathrm{SCN}^{-}$?

The d-electron configurations of $\mathrm{Cr}^{2+}, \mathrm{Mn}^{2+}$, $\mathrm{Fe}^{2+}$ and $\mathrm{Co}^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit minimum paramagnetic behaviour? (At. no. $\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26, \mathrm{Co}=27$ )

Which of the following has the minimum bond length?

The complex, $\left[\mathrm{Pt}(\mathrm{Py})\left(\mathrm{NH}_3\right) \mathrm{BrCl}\right]$ will have how many geometrical isomers?

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

Which of the following structures is the most preferred and hence of lowest energy for $\mathrm{SO}_3$ ?

Which of the following pairs of metals is purified by van Arkel method?

Which of the following carbonyls will have the strongest $\mathrm{C}-\mathrm{O}$ bond?

Of the following complex ions, which is diamagnetic in nature?

Considering the state of hybridisation of carbon atoms, find out the molecule among the following which is linear.