AIEEE 2009 PYQ Mock Test

Knowing that the Chemistry of lanthanoids (Ln) is dominated by its $+3$ oxidation state, which of the following statements is incorrect?

A liquid was mixed with ethanol and a drop of concentrated ${\text{H}}_2{\text{SO}}_4$ was added. A compound with a fruity smell was formed. The liquid was:

Arrange the carbanions, $({\text{CH}}_3{)}_3{\text{C}}^{-}$, ${\text{CCl}}_3^{-}$, $({\text{CH}}_3{)}_2{\text{CH}}^{-}$, ${\text{C}}_6{\text{H}}_5{\text{CH}}_2^{-}$, in order of their decreasing stability:

The alkene that exhibits geometrical isomerism is:

In which of the following arrangements, the sequence is not strictly according to the property written against it?