JEE Main 2015 · 11 Apr · Shift 1 · Chemistry Q60

ChemistrySingle correct+4 / -1Question 60 of 90

A pink coloured salt turns blue on heating. The presence of which cation is most likely ?

\ce{Cu^2+}

\ce{Fe^2+}

\ce{Zn^2+}

\ce{Co^2+}

Answer and worked solution

Official answer: D

Hydrated cobalt(II) salts (e.g. $\ce{CoCl2.6H2O}$ ) are pink and turn blue on losing water when heated.

JEE Main 2015 · 11 Apr · Shift 1, Chemistry question 60