JEE Main 2022 · 30 Jun · Shift 1 · Chemistry Q69

ChemistrySingle correct+4 / -1Question 69 of 90

Correct statement about alkali metal oxides is

peroxides are colored.

superoxides are paramagnetic.

oxides are paramagnetic.

peroxides are both colored and paramagnetic.

Answer and worked solution

Official answer: B

Superoxide $\mathrm{O_2^-}$ has an unpaired electron: paramagnetic. Oxides and peroxides are diamagnetic and colourless.

(B)

Topics:Alkali metals

JEE Main 2022 · 30 Jun · Shift 1, Chemistry question 69