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Chemistry-

General

Easy

Question

The RMS velocity of a gas is $3.5 cross times 10 to the power of 4$ cm/sec The most probable velocity of the molecules is

$2.856 \times 10^{4}$ cm/sec
$3.22 \times 10^{4}$ cm/sec
$3.798 \times 10^{4}$ cm/sec
$4.289 \times 10^{4}$ cm/sec

The correct answer is: $2.856 cross times 10 to the power of 4$ cm/sec

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A student forgot to add the reaction mixture to the round bottomed flask at 27°C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake and using a pyrometer he found the temperature of flask was 477°C. The fraction of air that has been expelled out is

A student forgot to add the reaction mixture to the round bottomed flask at 27°C but instead he/she placed the flask on the flame. After a lapse of time, he realized his mistake and using a pyrometer he found the temperature of flask was 477°C. The fraction of air that has been expelled out is

Chemistry-General

Time taken to distribute one Avogadro number of wheat grains, if 1010 grains are distributed in each second is

Time taken to distribute one Avogadro number of wheat grains, if 1010 grains are distributed in each second is

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On a ship sailing in pacific ocean where temperature is 23.4°C, a balloon is filled with 2 L air. The volume of the balloon when the ship reaches Indian ocean at a temperature of 26.1°C is

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Chemistry-General

parallel

3.5 gms of carbon monoxide at 0°C and 760mm pressure contains _______ molecules. [Avogadro number = $6 cross times 10 to the power of 23$ ]

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The value of Boltzman constant, K is

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Which of the following are correct statements.
1) 760 torr is equal to 1 atmosphere
2) 106 dynes/c $straight m squared$ is called 1 bar
3) 105 Newtons / $straight m squared$ is Pascal
4) Atmosphere is $1.013 cross times 10 to the power of 5$ ⁵dynes/ $straight m squared$

Which of the following are correct statements.
1) 760 torr is equal to 1 atmosphere
2) 106 dynes/c $straight m squared$ is called 1 bar
3) 105 Newtons / $straight m squared$ is Pascal
4) Atmosphere is $1.013 cross times 10 to the power of 5$ ⁵dynes/ $straight m squared$

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The preparation of SO₃(g) by $S O subscript 2 end subscript left parenthesis g right parenthesis plus fraction numerator 1 over denominator 2 end fraction O subscript 2 end subscript left parenthesis g right parenthesis J S O subscript 1 end subscript left parenthesis g right parenthesis$ is an exothermic reaction. If the preparation follows the following temperature-pressure relationship for its % yield, then for temperatures T₁ ,T₂ and T₃ . The correct option is

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The ends of hypotenuse of a right angled triangle are (5, 0), (-5, 0) then the locus of third vertex is

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