Stoichiometry General Knowledge Short Questions & Answers | Stoichiometry General Knowledge Quiz

41 Pick out the correct conversion?

A 1 BTU =453.6 calories

B 1 BTU = 252 calories

C 1 calorie = 252 BTU

D 1 calorie = 453.6 BTU

Answer: 1 BTU = 252 calories

42 Pick out the wrong statement?

A Insulating refractories used in place of regular refractory bricks are usually called light weight refractories, and they have similar composition as heavy bricks

B Graphite refractories are also called plumbago refractories

C Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28

D Calcined magnesite is also called dead burnt magnesite

View Answer

Answer: Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28

43 Pick out the wrong statement?

A Refractories used in muffle furnace should have low thermal conductivity

B The electrical resistivity of refractories drops rapidly with rise in temperature

C For reducing spalling tendency, the refractory should be well fired and its porosity should be more

D Refractoriness under load (RUL) of a refractory is always less than its refractoriness

View Answer

Answer: Refractories used in muffle furnace should have low thermal conductivity

44 The number of H+ in 1 c.c solution of pH 13 is__________________?

A 6.023 × 1013

B 6.023 × 1010

C 6.023 × 107

D 1013

View Answer

Answer: 6.023 × 107

45 If 1.5 moles of oxygen combines with aluminium to form Al2O3, then the weight of aluminium (atomic weight = 27) used in this reaction is __________ gm?

A 27

B 54

C 5.4

D 2.7

View Answer

Answer: 54

46 In physical adsorption, as compared to chemisorption, the________________________?

A Quantity adsorbed per unit mass is higher

B Rate of adsorption is controlled by the resistance to surface reaction

C Activation energy is very high

D Heat of adsorption is very large

View Answer

Answer: Quantity adsorbed per unit mass is higher

47 1 bar is almost equal to __________________________ atmosphere?

A 1

B 10

C 100

D 1000

View Answer

Answer: 1

48 Two solutions A1 and A2 have pH value of 2 and 6 respectively. It implies that the solution_____________________?

A A2 is more alkaline than solution A2

B A1 is highly acidic

C A1 is very slightly acidic

D Both A. & C

View Answer

Answer: Both A. & C

49 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

View Answer

Answer: None of these

50 Pick out the wrong statement about the recycle stream in a process ?

A Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants

B The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio

C Recycling in a process does not help in getting higher extent of reaction

D Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column

View Answer

Answer: Recycling in a process does not help in getting higher extent of reaction

51 Saturated molal absolute humidity of the vapor-gas mixture depends upon the______________________?

A Vapor pressure at dry bulb temperature

B Total pressure

C Both A. and B.

D Neither A. nor B.

View Answer

Answer: Both A. and B.

52 Measurement of the amount of dry gas collected over water from volume of moist gas is based on the___________________?

A Charle’s law

B Dalton’s law of partial pressures

C Avogadro’s hypothesis

D Boyle’s law

View Answer

Answer: Dalton’s law of partial pressures

53 How many phases are present at eutectic point ?

A 2

B 1

C 3

D unpredictable

View Answer

Answer: 3

54 The atomic heat capacities of all solid elements ______________ with decrease in temperature?

A Increases

B Decreases

C Remains unchanged

D Approach zero at 0°C

View Answer

Answer: Decreases

55 The value of the gas-law constant ‘R’ is 1.987 ?

A kcal/kg-mole.°C

B Btu/lb-mole.°R

C kcal/kg-mole.°K

D Both B. & C

View Answer

Answer: Both B. & C

56 Avogadro’s number is equal to__________________?

A 6.023 × 1023 molecules/kg.mole

B 6.023 × 1023 molecules/gm.mole

C 6.023 × 1016 molecules/kg.mole

D 6.023 × 1026 molecules/gm.mole

View Answer

Answer: 6.023 × 1023 molecules/gm.mole

57 The density of a liquid is 1500 kg/m3. Its value in gin/litre will be equal to________________?

A 1.5

B 15

C 150

D 1500

View Answer

Answer: 1500

58 A saturated vapor on being compressed would___________________?

A Condense

B Form wet steam

C Both A. & B

D Neither A. nor B.

View Answer

Answer: Both A. & B

59 A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal______________?

A Kinetic energy

B Intermolecular forces of attraction

C Potential energy

D Total energy

View Answer