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Chemistry
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Acids Bases and Salts
23
Biochemistry Introduction
217
Characteristics of Acids Bases and Salts
114
Chemical Industries
66
Environmental Chemistry: Atmosphere
95
Environmental Chemistry: Water
61
Chemical Equilibrium
46
Hydrocarbons
86
Organic Chemistry
92
The Atmosphere
25
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Biochemistry Introduction
Which of the following keeps the cornea moist?
vitamin A
vitamin B
vitamin C
vitamin D
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Hydrocarbons
The molecular formula of ethane is
CH4
C2H6
C3H8
C4H10
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Organic Chemistry
Compounds in which one hydrogen atom of an alkane is substituted by one halogen atom are called
halo alkanes
phenols
ethers
alcohols
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Chemical Industries
The first step of the Solvay process is
preparation of ammonical brine
carbonation
filtration
calcination
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Environmental Chemistry: Atmosphere
The pH of normal rainwater is
4
5
5.6
6.6
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Environmental Chemistry: Atmosphere
Which of the following have an impact on brain development in human beings especially among children?
chlorofluorocarbons (CFCs)
methane
carbon monoxide
lead compounds
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Environmental Chemistry: Atmosphere
Which of the following protects Earth's surface from being hit by most meteoroids?
troposphere
stratosphere
mesosphere
thermosphere
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Biochemistry Introduction
Carbohydrates which form 2 to 9 molecules of simple sugars upon hydrolysis are called
monosaccharides
oligosaccharides
polysaccharides
starch
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The Atmosphere
Solvents used for cleaning electronic circuit boards are
chlorofluorocarbons
carbons
fluorides
grease
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Characteristics of Acids Bases and Salts
Which of the following is used as an acidulant for food?
hydrochloric acid
nitric acid
sulphuric acid
phosphoric acid
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