AIEEE 2010 PYQ Mock Test

Topics Covered

Sample Questions from this Test

1. The standard enthalpy of formation of ${\text{NH}}_3$ is $-46.0{\text{kJ mol}}^{-1}$. If the enthalpy of formation of ${\text{H}}_2$ from its atoms is $-436{\text{kJ mol}}^{-1}$ and that of ${\text{N}}_2$ is $-712{\text{kJ mol}}^{-1}$, the average bond enthalpy of $\text{N}-\text{H}$ bond in ${\text{NH}}_3$ is:
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2. The time for half life period of a certain reaction $\text{A}\to \text{products}$ is $1\text{hour}$. When the initial concentration of the reactant '$\text{A}$ ', is $2.0{\text{mol L}}^{-1}$, how much time does it take for its concentration to come from $0.50$ to $0.25{\text{mol L}}^{-1}$ if it is a zero order reaction?
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3. A solution containing $2.675\text{g}$ of ${\text{CoCl}}_3\cdot 6{\text{NH}}_3$ (molar mass $=267.5{\text{g mol}}^{-1}$) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of ${\text{AgNO}}_3$ to give $4.78\text{g}$ of $\text{AgCl}$ (molar mass $=143.5{\text{g mol}}^{-1}$). The formula of the complex is (At. Mass of $\text{Ag}=108\text{u}$):
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