Mass Transfer Multiple Choice Questions on “Density”.
1. Which one is having highest density?
a) Snow
b) Teflon
c) Soil
d) Sand
Answer: b
Clarification: 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
Answer: c
Clarification: 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
Answer: a
Clarification: 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
Answer: d
Clarification: 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
Answer: b
Clarification: 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
Answer: c
Clarification: 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
Answer: a
Clarification: 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
Answer: d
Clarification: 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
Answer: a
Clarification: 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
Answer: b
Clarification: Oak has spirally arranged leaves, with lobate margins in many species. There are strong molecular forces of attraction between their bonds.