JEE Main 202624 Jan, Evening shiftChemistryEasyd- and f-Block Elements158× since 2002
"X" is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6 oxidation state in "X". The color of the potassium salt of X is
JEE Main 2026 · 24 Jan, Evening shift · Q64