JEE Main 2006 — Inorganic Chemistry

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a $\mathrm{Ca}^{2+}$ ion?

Nickel $(Z=28)$ combines with a uninegative monodentate ligand $\mathrm{X}^{-}$to form a paramagnetic complex $\left[\mathrm{NiX}_4\right]^{2-}$. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively

The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is

The decreasing values of bond angles from $\mathrm{NH}_3\left(106^{\circ}\right)$ to $\mathrm{SbH}_3\left(101^{\circ}\right)$ down group-15 of the periodic table is due to

Which of the following molecules/ions does not contain unpaired electrons?

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?

Which of the following chemical reactions depicts the oxidizing behaviour of $\mathrm{H}_2 \mathrm{SO}_4$ ?

The IUPAC name for the complex $\left[\mathrm{Co}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)_5\right] \mathrm{Cl}_2$ is

Lanthanoid contraction is caused due to

In $\mathrm{Fe}(\mathrm{CO})_5$, the $\mathrm{Fe}-\mathrm{C}$ bond possesses

A metal, $M$ forms chlorides in its $+2$ and $+4$ oxidation states. Which of the following statements about these chlorides is correct?

Among the following mixtures, dipole-dipole as the major interaction, is present in

In which of the following molecules/ions are all the bonds not equal?

What products are expected from the disproportionation reaction of hypochlorous acid?