Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 207

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The ${pK}_{a}$ for acetylsalicylic acid (aspirin) is $3.5 .$ The $pH$ of gastric juice in the human stomach is about $2 - 3$ and the $pH$ in the small intestine is about $8$ . Aspirin will be:

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Important Questions on Miscellaneous Objective Questions

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 208

The degree of dissociation of an electrolyte does not depend on

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 209

From the given plot between $Z$ and $p$ for a real gas, the correct relation is:

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 210

The van der Waals equation for

1

mole of gas is

(p + \frac{a}{V^{2}}) (V - b) = RT

, where,

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 211

A mixture of

H_{2}

and

O_{2}

taken in a bulb in

2 : 1

mole ratio is allowed to diffuse through a fine hole. The composition of the gases (mole ratio) coming out initially will be:

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 212

For a dilute solution,

lowering of vapour pressure \propto mole fraction of the solute

or,

lowering

of vapour pressure = K \times mole fraction of the solute

, where

K

is:

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 213

For ideal binary solution,

$P_{T} = X_{A} P_{A} ° + X_{B} P_{B} °$

This equation reflects

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 214

Dry air is passed through a solution and then through its solvent and finally through

{CaCl}_{2}

. The ratio of weight loss in the solvent to the weight gain in

{CaCl}_{2}

gives

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Modern Approach to Chemical Calculations>Chapter 22 - Miscellaneous Objective Questions>Exercise 1>Q 215

The relative lowering of vapour pressure of an aqueous solution of urea is

0.018

. If

K_{b}

for

H_{2} O

is

0.54 ° C m^{- 1},

the elevation in boiling point will be: