List of top Chemistry Questions on d block elements asked in JEE Advanced

Fusion of $MnO_2$ with $KOH$ in presence of $O_2$ produces a salt W. Alkaline solution of W upon electrolytic oxidation yields another salt $X$. The manganese containing ions present in $W$ and $X$, respectively, are $Y$ and $Z$. Correct statement(s) is(are)

The correct option(s) to distinguish nitrate salts of ${Mn^{2+}}$ and ${Cu^{2+}}$ taken separately is (are)

Which of the following combination will produce $H_2$ gas?

The correct statement(s) about $Cr^{2+}$ and $Mn^{3+}$ is (are) - [Atomic numbers of $Cr = 24$ and $Mn = 25$]

A solution of colourless salt $H$ on boiling with excess $NaOH$ produces a non-flammable gas. The gas evolution ceases after sometime. Upon addition of $Zn$ dust to the same solution, the gas evolution restarts. The colourless salt(s) $H$

Native silver metal forms a water soluble complex with a dilute aqueous solution of $NaCN$ in the presence of

A solution of a metal ion when treated with $KI$ gives a red precipitate which dissolves in excess $KI$ to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is

Which of the following pair is expected to exhibit same colour in solution?

Which of the following will not be oxidised by $O_3$?

The pair of compounds having metals in their highest oxidation state is

$(NH_4)_2Cr_2 O_7$ on heating gives a gas which is also given by

When $I^-$ is oxidised by $MnO_4^-$ in alkaline medium, $I^-$ converts into

Amongst the following, identify the species with an atom in + 6 oxidation state

In the dichromate dianion

On heating ammonium dichromate, the gas evolved is

Which of the following statement(s) is/are correct when a mixture of NaCI and K$_2Cr_2O_7$ is gently warmed with cone. $H_2SO_4 ? $

Which of the following compounds is expected to be coloured?

Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is

The reaction which proceed in the forward direction is

Zinc-copper couple that can be used as a reducing agent is obtained by

How many unpaired electrons are present in $Ni^2$ ?