Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 44

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Earn 100

$20 mL$ of a mixture of $CO$ and $H_{2}$ were mixed with excess of $O_{2}$ and exploded & cooled. There was a volume contraction of $23 mL .$ All volume measurements corresponds to room temperature $(27 ° C)$ and one atmospheric pressure. Determine the volume ratio $V_{1} : V_{2}$ of $CO$ and $H_{2}$ in the original mixture

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Important Questions on Some Basic Concepts of Chemistry

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 45

The

%

by volume of

C_{4} H_{10}

in a gaseous mixture of

C_{4} H_{10}, {CH}_{4}

and

CO

is

40 .

When

200 ml

of the mixture is burnt in excess of

O_{2} .

Find volume (in

ml

) of

{CO}_{2}

produced.

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 46

An ideal gaseous mixture of ethane

(C_{2} H_{6})

and ethene

(C_{2} H_{4})

occupies

28

litre at

1 atm, 0 ° C .

The mixture reacts completely with

128 gm O_{2}

to produce

{CO}_{2}

and

H_{2} O .

Mole fraction at

C_{2} H_{6}

in the mixture is-

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 47

An isotone of

{}_{32}^{76}{Ge}

is -

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 48

If molecules of the gas are spherical of radius

1 \overset{o}{A}

, the volume occupied by the molecules in

1

mol of a gas is :

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 49

Which of the following relations is incorrect for solutions?

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 50

In the reaction

{CrO}_{5} + H_{2} {SO}_{4} \to {Cr}_{2} {({SO}_{4})}_{3} + H_{2} O + O_{2}

;

2

moles of

{CrO}_{5}

will liberate how many moles of

O_{2} : -

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 51

Temporary hardness is due to ${HCO}_{3}^{-}$ of ${Mg}^{2 +}$ and ${Ca}^{2 +} .$ It is removed by addition of $CaO .$

$Ca {({HCO}_{3})}_{2} + CaO \to 2 {CaCO}_{3} + H_{2} O$

Mass of $CaO$ required to precipitate $2 g {CaCO}_{3}$ is :-

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Beta Question Bank for Engineering: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-1>Q 52

The normality of 4% (mass/vol.) NaOH is: