Iodine is formed when potassium iodide reacts with a solution of

Among $CrO$,$Cr_2O_3$,and $CrO_3$,the sum of spin-only magnetic moment values of basic and amphoteric oxides is . . . . . . . . $10^{-2} \ BM$ (nearest integer).
(Given atomic number of $Cr$ is $24$)

The oxoanion in which the oxidation state of the central atom is same as its group number in the periodic table is

On heating a mixture of common salt and $K_{2}Cr_{2}O_{7}$ with concentrated $H_{2}SO_{4}$,a gas is evolved. The formula of the gas evolved and the oxidation state of the central metal atom in the gas,respectively,are:

The yellow colour solution of $Na_2CrO_4$ changes to orange-red on passing $CO_2$ gas due to the formation of

$A$ hard and resistant metal alloy generally used in the tip of the nib of a fountain pen is