Stoichiometry - Chemical Engineering Questions and Answers

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In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B

exhibits positive deviation from Raoult's law.

exhibits negative deviation from Raoult's law.

obeys Raoult's law.

may exhibit either positive or negative deviation from Raoult's law.

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Avogadro number is the number of molecules in one __________ of a gas.

gram

kilogram

gm.mole

litre

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Number of gram equivalent of solute dissolved in one litre of solution is called its

normally

molarity

molality

formality

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The number of atoms of oxygen present in 11.2 litres of ozone (O₃) at N.T.P. are

3.01 x 10²²

6.02 x 10²³

9.03 x 10²⁴

1.20 x 10²⁴

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Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.

no change

doubling

l/4th reduction

four fold increase

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Heat of reaction is not influenced by

the route/method through which final products are obtained.

the physical state (e.g., solid, liquid or gaseous) of reactants and products.

whether the reaction is carried out at constant temperature or constant pressure.

none of these.

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Pick out the wrong conversion formula for the conversion of weight units :

1 tonne = 1000 kg = 22.046 lbs

1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton

1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons

none of these

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The elevation in boiling point of a solution is proportional to the __________ of the solution.

molal concentration

reciprocal of the molal concentration

normality

molarity

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Pick out the wrong statement.

One kg-mole of an ideal gas occupies 22.4 m³ at N.T.P.

One lb-mole of an ideal gas occupies 359 ft³ at N.T.P.

One gm-mole of an ideal gas occupies 22.4 litres (i.e., 22400 c.c) at N.T.P.

Density of dry air at N.T.P. is 1 gm/litre.