Stoichiometry MCQ Questions & Answers

51

Osmotic pressure of the solution can be increased by

A) Decreasing its temperature B) Increasing the volume of the vessel containing the solution C) Diluting the solution D) None of these

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Answer & Solution

Answer: Option D

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52

The net heat evolved or absorbed in a chemical process, i.e. total change in the enthalpy of the system is independent of the

A) Temperature & pressure B) Number of intermediate chemical reactions involved C) State of aggregation & the state of combination at the beginning & the end of the reaction D) None of these

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Answer & Solution

Answer: Option B

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53

Pick out the wrong statement.

A) To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg B) 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25 C) A gas bubble at a pressure of P_g is passed through a solvent with a saturation vapour pressure of P_s. If the time of passage of the bubble is long and air is insoluble in the solvent, the mole fraction of solvent in the bubble will be equal to $$\frac{{{{\text{P}}_{\text{s}}}}}{{{{\text{P}}_{\text{g}}}}}$$ D) A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility of the solute is C₁. The output rate of solids from an efficient crystalliser is (C + C₁)V

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Answer & Solution

Answer: Option D

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54

The unit of dynamic viscosity is

A) Stoke B) Poise C) Gm/cm sec D) Both B & C

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Answer & Solution

Answer: Option D

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55

A gas mixture contains 6 moles of H₂ and 2 moles of N₂. If the total pressure of the gaseous mixture is 4 kgf/cm²; then the partial pressure of N₂ in the mixture will be __________ kgf/cm².

A) 1 B) 2 C) 4 D) 8

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Answer & Solution

Answer: Option A

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56

The heat capacity of a substance is

A) Greater for liquid state than for solid state B) Lower for liquid state than for gaseous state C) Higher for solid state than for liquid state D) Equal for solid and liquid states below melting point

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Answer & Solution

Answer: Option A

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57

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be C_p = 29.1 J/mole.°C and, C_v = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is

A) 13728 J B) 19206 J C) 4576 J D) 12712 J

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Answer & Solution

Answer: Option B

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58

__________ kg of CaCO₃ on heating will give 56 kg of CaO.

A) 56 B) 100 C) 144 D) 1000

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Answer & Solution

Answer: Option B

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59

The temperature at which real gases obey the ideal gas law over a wide range of pressure is called the __________ temperature.

A) Reduced B) Boyle C) Critical D) Inversion

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Answer & Solution

Answer: Option D

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60

The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be

A) Basic B) More acidic C) Neutral D) Of the same acidity

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Answer & Solution

Answer: Option A

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Stoichiometry MCQ Questions & Answers | Chemical Engineering