# Mass Transfer Questions and Answers – Density

This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Density”.

1. Which one is having highest density?
a) Snow
b) Teflon
c) Soil
d) Sand

Explanation: Teflon, also known as polytetrafluoroethylene has density 2200 kg/m3. It is a thermoplastic polymer, which is a white solid at room temperature. Density of snow, soil and sand are 110 kg/m3, 2050 kg/m3 and 1515 kg/m3 respectively.

2. What is the density of paper in kg/m3?
a) 910
b) 920
c) 930
d) 940

Explanation: Paper density is used in pulp or fabric industry in order to measure of the mass of the product per unit of area for a type of paperboard.

3. Which one is having the least density?
a) Ice
b) Pyrex
c) Paraffin
d) Marble

Explanation: Ice is water. Depending on the presence of impurities such as particles of soil or bubbles of air, it can appear transparent or a more or less opaque bluish-white color.

4. What is the density of sand in kg/m3?
a) 1215
b) 1315
c) 1415
d) 1515

Explanation: Density of sand can vary depending on the grain size and moisture content and how tightly it is compacted.

5. What is the density of snow in kg/m3?
a) 100
b) 110
c) 120
d) 130

Explanation: Snow is precipitation in the form of flakes of crystalline water ice that falls from clouds. It is a granular material, soft, white and fluffy structure.

6. Which one is having least density?
a) Clay
b) Coal
c) Cotton
d) Banana

Explanation: Cotton is a soft, fluffy staple fiber that grows in a boll. The fiber is spun into yarn or thread. Density of cotton is 80 kg/m3 while that of clay, coal and banana are 1460 kg/m3, 1350 kg/m3 and 980 kg/m3.

7. What is the density of limestone in kg/m3?
a) 2320
b) 2430
c) 2530
d) 2630

Explanation: It is also known as calcium hydroxide. It is a colorless crystal which is obtained from calcium oxide.

8. What is the density of granite in kg/m3?
a) 2130
b) 2230
c) 2530
d) 2630

Explanation: It is granular and phaneritic in nature. This mainly consists of feldspar, mica and quartz.

9. Which one is having highest density?
a) Leather
b) Paper
c) Balsa
d) Snow

Explanation: Density of leather is 998 kg/m3 while that of paper, balsa and snow are 930 kg/m3, 140 kg/m3 and 110 kg/m 3.

10. What is the density of oak in kg/m3?
a) 445
b) 545
c) 645
d) 745

Explanation: Oak has spirally arranged leaves, with lobate margins in many species. There are strong molecular forces of attraction between their bonds.

Sanfoundry Global Education & Learning Series – Mass Transfer.

To practice all areas of Mass Transfer, here is complete set of 1000+ Multiple Choice Questions and Answers.