Embibe Experts Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 2: Exercise 2

Assuming that petrol is iso-octane $\left({\mathrm{C}}_8{\mathrm{H}}_{18}\right)$ and has a density $0.8 \mathrm{g} {\mathrm{mL}}^{-1}$. What will be the consumption of oxygen on complete combustion of $1.425 \mathrm{L}$ petrol? 

When a mixture of $10$ mole of ${\mathrm{SO}}_2,15$ mole of ${\mathrm{O}}_2$ was passed over catalyst,$8$ mole of ${\mathrm{SO}}_3$ was formed. How many mole of ${\mathrm{SO}}_2$ and ${\mathrm{O}}_2$ did not enter into combination?

$0.5 \mathrm{mole}$ of ${\mathrm{H}}_2{\mathrm{SO}}_4$ is mixed with $0.2 \mathrm{mole}$ of $\mathrm{Ca} (\mathrm{OH}{)}_2$ . The maximum number of moles of ${\mathrm{CaSO}}_4$ formed is

What is the quantity of water that should be added to $16 \mathrm{g}$ methanol to make the mole fraction of methanol as $0.25$?

$0.32 \mathrm{g}$ of a metal on treatment with an acid gave $112 \mathrm{mL}$ of hydrogen at $\mathrm{NTP}$. Calculate the equivalent weight of the metal.

$3.0$ molal $\mathrm{NaOH}$ solution has a density of $1.110 \mathrm{g}/\mathrm{mL}$. The molarity of the solution is :

The equilibrium ${\mathrm{N}}_2 \left(\mathrm{g}\right)+{\mathrm{O}}_2 \left(\mathrm{g}\right)\rightleftharpoons 2\mathrm{NO} \left(\mathrm{g}\right)$ is established in a reaction vessel of $2.5 \mathrm{L}$ capacity. The amounts of ${\mathrm{N}}_2$ and ${\mathrm{O}}_2$ taken at the start were respectively $2$ moles and $4$ moles. Half a mole of nitrogen has been used up at equilibrium. The molar concentration of nitric oxide is:

$5$ moles of ${\mathrm{SO}}_2$ and $5$ moles of ${\mathrm{O}}_2$ are allowed to react to form ${\mathrm{SO}}_3$ in a closed vessel. At the equilibrium stage, $60 \%$ ${\mathrm{SO}}_2$ is used up. The total number of moles of ${\mathrm{SO}}_2$, ${\mathrm{O}}_2$ and ${\mathrm{SO}}_3$ in the vessel now is: