Chemical Engineering · all questions

Stoichiometry
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Q161

Othmer chart is useful in estimating the heat of

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Q162

In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is

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Q163

In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is

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Q164

What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?

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Q165

Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the 'corresponding states'. At equal reduced conditions i.e., at the corresponding state, the __________ of different gases are nearly the same.

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Q166

If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is __________ times.

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Q167

The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements. This is the statement of

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Q168

In the reaction, represented by Na₂CO₃ + HCl → NaHO₃ + NaCl, the equivalent weight of Na₂CO₃ is

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Q169

One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C; the saturation pressure is 0.943 bar; one kg of water vapour under these conditions has a volume of 1.789 m³. The amount of water vapour condensed (in kg) is

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Q170

Gases having same reduced temperatures and reduced pressures

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Q171

Real gases approach ideal behaviour at

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Q172

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

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Q173

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

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Q174

The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is

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Q175

Roult's law is obeyed by a __________ solution.

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Q176

The quantity of heat required to evaporate 1 kg of a saturated liquid is called

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Q177

Pick out the wrong statement.

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Q178

A car tyre of volume 0.057 m³ is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and C_v for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is

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Q179

The chemical nature of an element is independent of

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Q180

The osmotic pressure of a solution increases, if its __________ is decreased.

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