It contains weak acid and its salt with strong base

It contains tribasic acid and strong base

It contains a number of neutral water molecules

None of these

It is an active form of lead

It decomposes into Pb and CO₂

Its molecular formula is Pb₂O₃

It decomposes into PbO and O₂

Hg₂Cl₂

HgCl₂

FeCl₂

PbCl₂

Transition metal compounds are coloured due to only d−d transition of e⁻

Spectra of lanthanides are sharp due to f−f transition

Most characteristic oxidation state of lanthanides is +3

Ce⁴⁺ is a strong oxidising agent

KF

KCl

KBr

KI