JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
The number of d-electrons retained in $\mathrm{Fe}^{2+}$ (At.no.of $\mathrm{Fe}=26$ ) ion is
One mole of the complex compound $\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}_3$, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of $\mathrm{AgNO}_3$ solution to yield two moles of $\mathrm{AgCl}$ (s). The structure of the complex is
What may be expected to happen when phosphine gas is mixed with chlorine gas?
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite
In curing cement plasters water is sprinkled from time to time. This helps in
Which one of the following nitrates will leave behind a metal on strong heating?
Which one of the following is an amphoteric oxide?
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
The radius of $\mathrm{La}^{3+}$ (Atomic number of $\mathrm{La}=57$ ) is $1.06 Å$. Which one of the following given values will be closest to the radius of $\mathrm{Lu}^{3+}$ (Atomic number of $\mathrm{Lu}=71$ )?
The radionucleide ${ }_{90}^{234} \mathrm{Th}$ undergoes two successive $\beta$-decays followed by one $\alpha$-decay. The atomic number and the mass number respectively of the resulting radionucleide are
A reduction in atomic size with increase in atomic number is a characteristic of element of
The pair of species having identical shapes for molecules of both species is
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that
According to the Periodic Law of elements, the variation in properties of elements is related to their
The atomic numbers of vanadium $(\mathrm{V})$, Chromium $(\mathrm{Cr})$, manganese $(\mathrm{Mn})$ and iron $(\mathrm{Fe})$ are respectively 23 , 24,25 and 26 . Which one of these may be expected to have the highest second ionization enthalpy?
Which one of the following compounds has the smallest bond angle in its molecule?
For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be
In the coordination compound, $\mathrm{K}_4\left[\mathrm{Ni}(\mathrm{CN})_4\right]$, the oxidation state of nickel is
Which one of the following pairs of molecules will have permanent dipole moments for both members?
In case of nitrogen, $\mathrm{NCl}_3$ is possible but not $\mathrm{NCl}_5$ while in case of phosphorous, $\mathrm{PCl}_3$ as well as $\mathrm{PCl}_5$ are possible. It is due to
The most stable ion is
When $\mathrm{H}_2 \mathrm{~S}$ is passed through $\mathrm{Hg}_2 \mathrm{~S}$ we get
In $\mathrm{XeF}_2, \mathrm{XeF}_4, \mathrm{XeF}_6$ the numebr of lone pairs of $\mathrm{Xe}$ are respectively
Alum helps in purifying water by