Embibe Experts Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 1: Exercise 1

The maximum $\%$of $\mathrm{N}$ is found in:

How many grams of ${\mathrm{NH}}_3$ can be obtained from hydrolysis of $1$ mol of Aluminium nitride?

The reaction $\mathrm{A} \left(\mathrm{g}\right)+\mathrm{B} \left(\mathrm{g}\right)\rightleftharpoons \mathrm{C} \left(\mathrm{g}\right)+\mathrm{D} \left(\mathrm{g}\right)$ is studied in a one litre vessel at $250 °\mathrm{C}$. The initial concentration of $\mathrm{A}$ was $3\mathrm{n}$ and that of $\mathrm{B}$ was $\mathrm{n}$. When equilibrium was attained, equilibrium concentration of $\mathrm{C}$ was found to the equal to the equilibrium concentration of $\mathrm{B}$. What is the concentration of $\mathrm{D}$ at equilibrium?

For the reaction $2\mathrm{P}+\mathrm{Q}\to \mathrm{R}, 8 \mathrm{mol}$ of $\mathrm{P}$ and $5 \mathrm{mol}$ of $\mathrm{Q}$ will produce:

There are $6 .02\times {10}^{22}$ molecules each of ${\mathrm{N}}_2, {\mathrm{O}}_2 \mathrm{and} {\mathrm{H}}_2$ which are mixed together at $760 \mathrm{mm}$ and $273 \mathrm{K}$. The mass of the mixture in grams is:

How many millilitres of $0.1 \mathrm{N} {\mathrm{H}}_2{\mathrm{SO}}_4$ solution will be required for complete reaction with a solution containing $0.125 \mathrm{g}$ of pure ${\mathrm{Na}}_2{\mathrm{CO}}_3$ :

The temporary hardness is due to the bicarbonates of ${\mathrm{Mg}}^{2+}$ and ${\mathrm{Ca}}^{2+}$. It is removed by the addition of $\mathrm{CaO}$ as follows: $\mathrm{Ca}{\left({\mathrm{HCO}}_3\right)}_2+\mathrm{CaO}⟶2{\mathrm{CaCO}}_3+{\mathrm{H}}_2\mathrm{O}$. The mass of $\mathrm{CaO}$ required to precipitate $2 \mathrm{g} {\mathrm{CaCO}}_3$ is