Neet 2005 PYQ Free Mock Test

Assertion : ${\text{B}}_2$ molecule is diamagnetic.Reason : The highest occupied molecular orbital is of $\sigma$ type.

Assertion : Rate of hydrolysis of methyl chloride to methanol is higher in $\text{DMF}$ than in water.Reason : Hydrolysis of methyl chloride follows second order kinetics.

Assertion : Galvanised iron does not rust.Reason : Zinc has a more negative electrode potential than iron.

Assertion : Extraction of iron metal from iron oxide ore is carried out by heating with coke.Reason : The reaction ${\text{Fe}}_2{\text{O}}_{3(s)}\to {\text{Fe}}_{(s)}+3/2{\text{O}}_{2(g)}$ is a spontaneous process.

Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.Reason : $\text{C}-\text{H}$ bond is stronger than $\text{C}-\text{D}$ bond.