Chemical Process Calculation Questions and Answers – Density and specific gravity-II

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Density and specific gravity-II”.

1. What is the density (g/cm3) of a solution with a specific gravity of 1.2?
a) 1.2
b) 0.83
c) 12.4
d) 2.5
View Answer

Answer: a
Explanation: Specific gravity is the ratio of the density of a material to the density of water (1 g/cm3 at 4°C). Thus, density = specific gravity × density of water = 1.2 g/cm3.

2. If a solution has a material concentration of 32.2% by weight in water, a specific gravity of 1.2, and flows at a rate of 15.5 L/min, what is the concentration of the material in kg/L?
a) 0.3864
b) 0.2033
c) 4.0673
d) 0.7728
View Answer

Answer: a
Explanation: Concentration in kg/L = (percentage of material by weight) × (density of solution in kg/L). Here, density in kg/L = 1.2 kg/L, so concentration = 0.322 × 1.2 = 0.3864 kg/L.

3. A solution flows at 15.5 L/min with a concentration of 32.2% by weight of a material having a molecular weight of 190. If the density of the solution is 1.2 kg/L, what is the flow rate of the material in kg/min?
a) 0.262
b) 0.252
c) 0.242
d) 0.232
View Answer

Answer: a
Explanation: Flow rate of the material (kg/min) = concentration of material (kg/L) × flow rate of solution (L/min). Thus, 0.3864 kg/L × 15.5 L/min = 0.262 kg/min.
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4. The density of material is 5 kg/cm3. What is its specific volume cm3/kg?
a) 0.2
b) 0.5
c) 5.0
d) 1.0
View Answer

Answer: a
Explanation: Inverse of density is specific volume.

5. The specific weight is also known as ________
a) Specific density
b) Specific volume
c) Weight density
d) None of the mentioned
View Answer

Answer: c
Explanation: The specific weight is also known as weight density.

6. The specific gravity of water is taken as
a) 0.01
b) 0.1
c) 1
d) 10
View Answer

Answer: c
Explanation: While measuring the specific gravity of liquids, it is measured with respect to water.

7. Two statements are given as
I: Specific density is dimensionless.
II: When salt is added to water, density of the solution will increase.
Number of correct statement is
a) 0
b) 1
c) 2
d) None of the mentioned
View Answer

Answer: c
Explanation: Specific density is the ratio of two densities and when salt is added to water, a high density material is added so finally the density rises .
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8. An object has specific gravity greater than 1. When it is kept on the surface of water, the object would
a) Sink
b) Float
c) Half part of the object floats
d) None of the mentioned
View Answer

Answer: a
Explanation: With respect to water, the specific gravity is greater than one so the density of the object is more than that of water.

9. What is the density of a rectangular block that measures 2 x 5 x 8 cm and has a mass of 66 grams?
a) 0.625 gm/cm3
b) 0.825 gm/cm3
c) 1.125 gm/cm3
d) 2.225 gm/cm3
View Answer

Answer: b
Explanation: Density = mass / volume. Volume of the block = 2 × 5 × 8 = 80 cm3. So, density = 66 g / 80 cm3 = 0.825 gm/cm3.
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10. What is the specific gravity of a material with a density of 0.825 gm/cm3?
a) 0.625
b) 0.825
c) 1.125
d) 2.225
View Answer

Answer: b
Explanation: Specific gravity = density of material / density of water (1 gm/cm3). Therefore, specific gravity = 0.825 / 1 = 0.825.

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.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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