Neet 2005 PYQ Free Mock Test

Assertion : Addition of ${\text{NH}}_4\text{OH}$ to an aqueous solution of ${\text{BaCl}}_2$ in the presence of ${\text{NH}}_4\text{Cl}$ (excess) precipitates $\text{Ba}(\text{OH}{)}_2$.Reason : $\text{Ba}(\text{OH}{)}_2$ is insoluble in water.

Assertion : ${\text{SeCl}}_4$ does not have a tetrahedral structure.Reason : $\text{Se}$ in ${\text{SeCl}}_4$ has two lone pairs.

Assertion : The molecular weight of acetic acid determined by depression in freezing point method in benzene and water was found to be different.Reason : Water is polar and benzene is non-polar.

Assertion : Compressibility factor for hydrogen varies with pressure with positive slope at all pressures.Reason : Even at low pressures, repulsive forces dominate hydrogen gas.

Assertion : First ionization energy for nitrogen is lower than oxygen.Reason : Across a period effective nuclear charge decreases.