Practice session

01Easy88×since 2002Q2037

The amount of sugar (C₁₂H₂₂O₁₁) required to prepare 2L of its 0.1 M aqueous solution is :

02Hard88×since 2002Q2038

A solution of two components containing n₁ moles of the 1^st component and n₂ moles of the 2^nd component is prepared. M₁ and M₂ are the molecular weights of component 1 and 2 respectively. If d is the density of the solution in g mL^–1, C₂ is the molarity and x₂ is the mole fraction of the 2^nd component, then C₂ can be expressed as :

03Medium88×since 2002Q2039

The strengths of 5.6 volume hydrogen peroxide (of density 1 g/mL) in terms of mass percentage and molarity (M), respectively, are: (Take molar mass of hydrogen peroxide as 34 g/mol)

04Hard88×since 2002Q2040

The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H₃PO₃ solution and 100 mL of 2 M H₃PO₂ solution, respectively, are :

05Easy88×since 2002Q2041

A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is: (Atomic mass : Cl = 35.5 amu, H = 1 amu)

06Medium88×since 2002Q2042

\mathrm{SO}_{2} \mathrm{Cl}_{2}

on reaction with excess of water results into acidic mixture

\mathrm{SO}_{2} \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{H}_{2} \mathrm{SO}_{4}+2 \mathrm{HCl}

16 moles of

\mathrm{NaOH}

is required for the complete neutralisation of the resultant acidic mixture. The number of moles of

\mathrm{SO}_{2} \mathrm{Cl}_{2}

used is :

07Medium88×since 2002Q2043

250 \mathrm{~g}

solution of

\mathrm{D}

-glucose in water contains

10.8 \%

of carbon by weight. The molality of the solution is nearest to (Given: Atomic Weights are,

\mathrm{H}, 1 \,\mathrm{u} ; \mathrm{C}, 12 \,\mathrm{u} ; \mathrm{O}, 16 \,\mathrm{u}

)

08Medium88×since 2002Q2044

1 \mathrm{~L}, 0.02 \mathrm{M}

solution of

\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{SO}_{4}\right]

Br is mixed with

1 \mathrm{~L}, 0.02 \mathrm{M}

solution of

\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{SO}_{4}

. The resulting solution is divided into two equal parts

(\mathrm{X})

and treated with excess of

\mathrm{AgNO}_{3}

solution and

\mathrm{BaCl}_{2}

solution respectively as shown below:

1 \mathrm{~L}

Solution

(\mathrm{X})+\mathrm{AgNO}_{3}

solution (excess)

\longrightarrow \mathrm{Y}

1 \mathrm{~L}

Solution

(\mathrm{X})+\mathrm{BaCl}_{2}

solution (excess)

\longrightarrow \mathrm{Z}

The number of moles of

\mathrm{Y}

and

\mathrm{Z}

respectively are

09Easy88×since 2002Q2092

The percentage composition of carbon by mole in methane is :

10Medium88×since 2002Q2045

What is the mass ratio of ethylene glycol (

\mathrm{C_2H_6O_2}

, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molar aqueous solution?

01Easy88×since 2002Q2037

The amount of sugar (C₁₂H₂₂O₁₁) required to prepare 2L of its 0.1 M aqueous solution is :

02Hard88×since 2002Q2038

03Medium88×since 2002Q2039

The strengths of 5.6 volume hydrogen peroxide (of density 1 g/mL) in terms of mass percentage and molarity (M), respectively, are: (Take molar mass of hydrogen peroxide as 34 g/mol)

04Hard88×since 2002Q2040

The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H₃PO₃ solution and 100 mL of 2 M H₃PO₂ solution, respectively, are :

05Easy88×since 2002Q2041

A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is: (Atomic mass : Cl = 35.5 amu, H = 1 amu)

06Medium88×since 2002Q2042

\mathrm{SO}_{2} \mathrm{Cl}_{2}

on reaction with excess of water results into acidic mixture

\mathrm{SO}_{2} \mathrm{Cl}_{2}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{H}_{2} \mathrm{SO}_{4}+2 \mathrm{HCl}

16 moles of

\mathrm{NaOH}

is required for the complete neutralisation of the resultant acidic mixture. The number of moles of

\mathrm{SO}_{2} \mathrm{Cl}_{2}

used is :

07Medium88×since 2002Q2043

250 \mathrm{~g}

solution of

\mathrm{D}

-glucose in water contains

10.8 \%

of carbon by weight. The molality of the solution is nearest to (Given: Atomic Weights are,

\mathrm{H}, 1 \,\mathrm{u} ; \mathrm{C}, 12 \,\mathrm{u} ; \mathrm{O}, 16 \,\mathrm{u}

)

08Medium88×since 2002Q2044

1 \mathrm{~L}, 0.02 \mathrm{M}

solution of

\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{SO}_{4}\right]

Br is mixed with

1 \mathrm{~L}, 0.02 \mathrm{M}

solution of

\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{SO}_{4}

. The resulting solution is divided into two equal parts

(\mathrm{X})

and treated with excess of

\mathrm{AgNO}_{3}

solution and

\mathrm{BaCl}_{2}

solution respectively as shown below:

1 \mathrm{~L}

Solution

(\mathrm{X})+\mathrm{AgNO}_{3}

solution (excess)

\longrightarrow \mathrm{Y}

1 \mathrm{~L}

Solution

(\mathrm{X})+\mathrm{BaCl}_{2}

solution (excess)

\longrightarrow \mathrm{Z}

The number of moles of

\mathrm{Y}

and

\mathrm{Z}

respectively are

09Easy88×since 2002Q2092

The percentage composition of carbon by mole in methane is :

10Medium88×since 2002Q2045

What is the mass ratio of ethylene glycol (

\mathrm{C_2H_6O_2}

, molar mass = 62 g/mol) required for making 500 g of 0.25 molal aqueous solution and 250 mL of 0.25 molar aqueous solution?

Some Basic Concepts of Chemistry

Some Basic Concepts of Chemistry