This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Density and specific gravity-III”.
1. A cube of ice is floating on water surface and when it completely melts, the level of water would _______
a) Increase
b) Decrease
c) Remains unchanged
d) None of the mentioned
View Answer
Explanation: There is no change in the volume of the water as the space occupied by the ice inside the water body is filled with it.
2. An object is once immersed in oil and once in water. The loss in weight would be
a) More in water
b) More in oil
c) Equal in both oil and water
d) None of the mentioned
View Answer
Explanation: Density of oil is more than water so there will be more buoyancy force.
3. Volume of the petroleum products changes with temperature so __________ is used to measure specific gravity.
a) Density
b) Specific volume
c) API gravity
d) None of the mentioned
View Answer
Explanation: Volume of the petroleum products changes with temperature so API gravity is used to measure specific gravity.
4. ___________ is measured in Hydrometer scale.
a) API gravity
b) Specific gravity
c) Density
d) None of the mentioned
View Answer
Explanation: API gravity is measured in Hydrometer scale.
5. What is the density of a block with a specific gravity of 2.3?
a) 2.3 gm/cm3
b) 0.256 gm/cm3
c) 2.659 gm/cm3
d) .00568 gm/cm3
View Answer
Explanation: Density = specific gravity × density of water. Since the density of water is 1 gm/cm3, the density of the block = 2.3 gm/cm3.
6. What is the mass of a block with dimensions 6 x 8 x 9 cm and a density of 2.3 gm/cm3?
a) 99.36 Kg
b) 9.996 Kg
c) 0.9936 Kg
d) None of the mentioned
View Answer
Explanation: Volume of the block = 6 × 8 × 9 = 432 cm3. Mass = density × volume = 2.3 gm/cm3 × 432 cm3 = 993.6 gm = 0.9936 kg.
7. A substance has a mass of 20 kg and volume of 40 m3. The specific gravity of the substance is 0.80 kg/cm3. What is the reference density (Kg/m3)?
a) 0.25
b) 0.50
c) 0.75
d) 1.00
View Answer
Explanation: Specific gravity = density of the substance / Reference density.
8. A material have a mass of 2 gms and volume of 4 cm3. The material would _____ on water surface.
a) Completely Float
b) Completely Sink
c) Partially Sink
d) None of the mentioned
View Answer
Explanation: Specific gravity of the material is less than one.
9. What is the density of a liquid with a specific gravity of 20?
a) 10 gm/cm3
b) 20 gm/cm3
c) 30 gm/cm3
d) 40 gm/cm3
View Answer
Explanation: Specific gravity = density of the liquid / density of water. Since the density of water is 1 gm/cm3, the density of the liquid = 20 gm/cm3.
10. What is the radius of a cylinder filled with liquid, given the liquid’s mass is 40 grams, the height of the cylinder is 5 cm, and the liquid’s density is 20 gm/cm3?
a) 0.356 cm
b) 0.459 cm
c) 0.678 cm
d) 0.756 cm
View Answer
Explanation: Volume = mass / density = 40 g / 20 gm/cm3 = 2 cm3. The volume of the cylinder is given by the formula πr2h, so 2 = 3.14×r2×5. Solving for r, we get r≈0.356 cm.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.
