JEE Main 2022 · 28 Jul · Shift 1 · Chemistry Q68

ChemistrySingle correct+4 / -1Question 68 of 90

Which of the following statement is incorrect ?

Low solubility of LiF in water is due to its small hydration enthalpy.

\mathrm{KO_2}

is paramagnetic.

Solution of sodium in liquid ammonia is conducting in nature.

Sodium metal has higher density than potassium metal.

Answer and worked solution

Official answer: A

LiF is sparingly soluble because of its very high lattice enthalpy, not a small hydration enthalpy. A is incorrect.

(A)

Topics:Alkali metals

JEE Main 2022 · 28 Jul · Shift 1, Chemistry question 68