Day 1- Flashcards
Ozone is important to mankind because it
A. Releases hydrogen in the atmosphere
B. Creates a protective coverage against ultraviolet rays
C. maintains the temperature of the earth
D. releases oxygen in the air
B. Creates a protective coverage against ultraviolet rays
Ozone is all of the following except
A. Bleaching agent
B. Oxidizing agent
C. less soluble in water than oxygen
D. disinfectant
C. less soluble in water than oxygen
The hardness of water is expressed as g/L of ?
A. CaO
B. MgO
C. CaCO3
D. MgCO
C. CaCO3
The international Standards on Quality Management and Quality Service is
A. ISO 9000
B. ISO 18000
C. ISO 14000
D. ISO 100
A. ISO 9000
A coastal and marine water primary used for commercial and sustenance fishing
A. Class A
B. Class SA
C. Class SB
D. Class SC
C. Class SB
A surface water intended for waters having watersheds which are uninhabited and protected
A. Class AA
B. Class A
C. Class B
D. Class
A. Class AA
A coastal water for coral reef packs and reserves as designated by law and concerned authorities.
A. Class AA
B. Class SA
C. Class SB
D. Class
B. Class SA
In the Deacon process for the manufacture of chlorine, HCl and O2 react to form Cl2 and water. Sufficient air is fed to provide 25% excess O2, and the fractional conversion of HCl is 70% . On the basis of 100 moles of HCl fed, the amount of air in moles fed into process is
A. 53.12
B. 136.78
C. 200
D. 149
D. 149
From the data in problem #8, the mole fraction of Cl2 gas in the product stream is
A. 0.214
B. 0.127
C. 0.151
D. 0.172
C. 0.151
Alcoholic fermentation is caused by the interaction of
A. Sugar and acids
B. Sugar and carbon dioxide
C. sugar and yeasts
D. yeast and pectin
C. sugar and yeasts
The part of a cell that contains the chromosome is the
A. Polysomes
B. nucleolus
C. mitochondrion
D. nucleus
D. nucleus
Enzymes which catalyze the breaking or making of double bonds are called
A. Transferases
B. ligases
C. isomerases
D. lyases
D. lyases
A plant cell differs from an animal cell because it has
A. Nucleus
B. vacuoles
C. cellulose cell wall
D. definite shape
C. cellulose cell wall
Vitamin E is also known as
A. Calciferol
B. axerophthol
C. ascorbic acid
D. tocopherol
D. tocopherol
The complementary strand of m-RNA formed over the single stranded DNA of sequence 5’ – A – T – C – A – G – T – 3’ is
A. 5’ – T – G – A – C – T – A – 3’
B. 5’ – A – C – U – G – A – U – 3’
C. 5’ – A – C – T – G – A – T – 3’
D. 5’ – U – A – G – U – C – A – 3’
B. 5’ – A – C – U – G – A – U – 3’
A study was made to evaluate the constants so that the Michaelis-Menten relationship could be used to describe waste utilization by bacteria. It was that one gram of bacteria could decompose the waste at a maximum rate of 20 grams per day when the waste concentration was high. Also, it was found that this same quantity of bacteria would decompose waste at a rate of 10 gram per day when the waste concentration surrounding the bacteria is 15 mg/L. The
rate of waste decomposition by 2 grams of bacteria if the waste concentration were maintained at 5 mg/L is
A. 10 g/day
B. 20 g/day
C. 5 g/day
D.15 g/day
A. 10 g/day
Matter has .
A. No mass but occupies space
B. Mass and occupies space
C. mass but occupies no space
D. no mass and occupies no space
B. Mass and occupies space
In gases, particles vibrate .
A. About their mean position
B. About a horizontal axis
C. about a vertical axis
D. in any direction
A. About their mean position
A property not possessed by a fluid is .
A. It can flow
B. It has a definite shape
C. it has mass
D. can be perceived by our senses
B. It has a definite shape
A solid the sublimes on heating is .
A. Sodium chloride
B. copper sulphate
C. ammonium chloride
D. lead sulphate
C. ammonium chloride
Temperature is a measure of:
A. Total kinetic energy of molecules
B. Total potential energy of molecules
C. average kinetic energy of the molecules
D. average potential energy of the molecules
A. Total kinetic energy of molecules
Carbon-12 atom has:
A. 6 electrons, 6 protons,6 neutrons
B. 12 electrons, 6 protons,6 neutrons
C. 6 electrons, 12 protons,6 neutrons
D. 18 electrons, 6 protons,6 neutrons
A. 6 electrons, 6 protons,6 neutrons
Formation of lead and bromide from lead bromide is an example of:
A. Decomposition reaction
B. Displacement reaction
C. synthesis reaction
D. neutralization reaction
A. Decomposition reaction
The main cause of rancidity in foods is:
A. Bacteria
B. Antioxidants
C. Proteins
D. Oxidation of fatty acid molecules
D. Oxidation of fatty acid molecules