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Determine the volume/volume percent solution made by combining $25 mL$ of ethanol with enough water to produce $200 mL$ of the solution.

Important Questions on Some Basic Concepts of Chemistry

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

A solution is prepared by dissolving

20 g NaOH

1250 mL

of a solvent of density

0.8 g / mL .

Then the molality of the solution is;

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

Dissolving 120 g of a compound of (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/mL. The molarity of the solution is :

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

The mole fraction of a solvent in aqueous solution of a solute is

0.8 .

The molality (in mol

{k g}^{- 1}

) of the aqueous solution is:

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

The mole fraction of glucose

(C_{6} H_{12} O_{6})

in an aqueous binary solution is

0.1 .

The mass percentage of water in it, to the nearest integer, is

\dots \dots \dots

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

The molality of solution containing 15.20 g of urea, (molar mass = 60) dissolved in 150 g of water is

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

In which one of the following reactions, entropy decreases?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

The volume of 0.1 M strong dibasic acid sufficient to neutralize 1g of a base that furnishes 0.04 mole of

O H^{-}

in aqueous solution is :

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

A litre of seawater (which weighs

1030 g

) contains

6 \times 10^{- 3} g

of dissolved oxygen. The concentration of dissolved oxygen in

ppm

is:

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

A solution (5 mL) of an acid X is completely neutralized by y mL of 1M NaOH. The same volume (y mL) of 1M NaOH is required to neutralize 10 mL of 0.6 M

H_{2} S O_{4}

completely. The normality (N) of the acid X is

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

What quantity (in

mL

) of a

45 %

acid solution of a mono-protic strong acid must be mixed with a

20 %

solution of the same acid to produce

800 mL

of a

29.875 %

acid solution?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

Dissolving

120 g

of urea in

1000 g

of water gave a solution of density

1.15 g / mL .

The molarity of the solution is:

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

What is mole fraction of the solute in a

1.00

m aqueous solution?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

Calculate the concentration of the

2 % (w / w) NaCl

solution in terms of molality.

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Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

The standard enthalpies of formation of

H_{2} O (l)

and

{CO}_{2} (g)

are respectively

- 286 kJ {mol}^{- 1}

and

- 394 kJ {mol}^{- 1}

. If the standard heat of combustion of

{CH}_{4} (g)

- 891 kJ {mol}^{- 1},

then the standard enthalpy of formation of

{CH}_{4} (g)

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

A gas mixture contains

25 %

He

and

75 % {CH}_{4}

by volume at a given temperature and pressure. The percentage by mass of methane in the mixture is approximately ___ .

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

The mole fraction of ethanol in water is

0.08

. Its molality is

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

While combusting in air,

4 g

H_{2}

gas was completely converted into water. If

36 μmole

{CO}_{2}

from air is dissolved into that water, what is the concentration of

{CO}_{2}

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

Which of the following is dependent on temperature?

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

If Avogadro's number is

A_{0}

, the number of sulphur atoms present in 200 mL of 1N

H_{2} {SO}_{4}

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Volumetric Calculations

8 g

NaOH

is dissolved in

18 g

H_{2} O

. Mole fraction of

NaOH

in solution and molality (in

mol {kg}^{- 1}

) of the solution respectively are:

Determine the volume/volume percent solution made by combining 25 mL of ethanol with enough water to produce 200 mL of the solution.

Important Questions on Some Basic Concepts of Chemistry

Learn and Prepare for any exam you want !

Determine the volume/volume percent solution made by combining $25 mL$ of ethanol with enough water to produce $200 mL$ of the solution.