Stoichiometry MCQ Questions & Answers

51

The OH^- concentration in a solution having pH value 3 is

A) 10^-3 B) 10^-10 C) 10^-11 D) 10^-13

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Answer & Solution

Answer: Option C

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52

The viscosity of water at room temperature may be around one

A) Centipoise B) Poise C) Stoke D) Both B & C

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Answer & Solution

Answer: Option A

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53

A vapor that exists above its critical temperature is termed as a __________ vapor.

A) Saturated B) Unsaturated C) Gaseous D) Sub-cooled

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Answer & Solution

Answer: Option C

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54

A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be

A) 0°C B) 0°K C) -136.5°C D) -136.5°K

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Answer & Solution

Answer: Option C

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55

A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be

A) -136.5°C B) - 136.5°K C) -273°C D) 0°K

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Answer & Solution

Answer: Option A

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56

Which of the following is not a unit of kinematic viscosity?

A) Poise B) Stoke C) Cm²/second D) None of these

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Answer & Solution

Answer: Option A

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57

The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be

A) 2M B) $$\frac{{\text{M}}}{2}$$ C) M D) $$\frac{{\text{M}}}{4}$$

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Answer & Solution

Answer: Option A

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58

Pick out the wrong statement.

A) Heat capacity of a diatomic gas is higher than that of a monoatomic gas B) Equal volumes of Argon and Krypton contain equal number of atoms C) Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 10²³ D) The binary mixture of a particular com-positidn in both vapor and liquid state is known as an azeotropic mixture

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Answer & Solution

Answer: Option B

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59

Ideal solution is formed, when its components have zero

A) Heat of mixing B) Volume change C) Both A & B D) Neither A nor B

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Answer & Solution

Answer: Option C

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60

The heat evolved in the combustion of benzene is represented by the equation:
C₆H₆ + 7.5O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg.mole
The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kg.mole.

A) +816.15 B) +1632.3 C) -1632.3 D) -2448.45

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Answer & Solution

Answer: Option C

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Stoichiometry MCQ Questions & Answers | Chemical Engineering