Hydrocarbons
Hydrogen flouride
Hydrogen sulphides
Nitrogen dioxide
✅ The correct answer is option B.
Chemical Engineering MCQs
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.
35
75
95
105
✅ The correct answer is option B.
Which of the following is the most detrimental for water used in high pressure boiler?
Silica
Turbidity
Phenol
Dissolved oxygen
✅ The correct answer is option A.
TLV of NO₂ & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO₂ causes
Skin disorder
Bronchitis
Bone disease
Cancer
✅ The correct answer is option B.
Which is the most widely used coagulant for the treatment of turbid water?
Alum (aluminium sulphate)
Lime
Ferric chloride
Sodium aluminate
✅ The correct answer is option A.
Radioactive solid nuclear wastes are disposed off by
High temperature incineration
Pathological incineration
Pyrolysis
Underground burial in concrete containers
✅ The correct answer is option D.
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
1000 to 2000
3000 to 6000
6000 to 9000
10000 to 100000
✅ The correct answer is option D.
Salt content in sea water is about __________ percent.
0.5
1
3.5
10
✅ The correct answer is option C.
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
10²
10⁵
10⁹
10¹⁵
✅ The correct answer is option B.
Persons working in cement plants and limestone quarries are more prone to disease like
Cancer
Asthma
Silicosis
Flourosis (bone disease)
✅ The correct answer is option C.