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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
Show/Hide Answers
Biochemistry Introduction
Which of the following is important in vision?
vitamin A
vitamin B
vitamin C
vitamin D
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Hydrocarbons
What is formed when methane is reacted with chlorine in direct sunlight?
carbon and HCl
carbon tetrachloride and HCl
chloromethane
dichloromethane
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Biochemistry Introduction
Considering the structure of DNA, each strand is made up of
deoxyribose sugar
phosphate unit
nitrogen base
all of above
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Biochemistry Introduction
Proteins that catalyze specific biological reactions without which life would be impossible are called
gelatin
enzymes
amylase
lactase
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Organic Chemistry
In destructive distillation, coal is converted to
coal gas, coal tar and coke
petrol and methane
natural gas and coke
coal tar and petrol
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Chemical Industries
A solid deposit containing a sufficiently high percentage of a mineral to make extraction of metal economically feasible is called
metal oxide
gangue
ore
none of above
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Biochemistry Introduction
Each nucleotide consists of how many components?
one
two
three
four
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Environmental Chemistry: Water
Temporary hardness of water is caused due to the presence of dissolved
calcium hydrogen carbonates only
magnesium hydrogen carbonates only
Sulphates and chlorides of calcium or magnesium
calcium hydrogen carbonates and magnesium hydrogen carbonates
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Biochemistry Introduction
Which of the following experimentally proved that in addition to carbohydrates, fats, proteins, and minerals, certain missing factors were also required for healthy growth?
C. Eijkman
F.G Hopkins
Casmir funk
J.Watson
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Chemical Industries
Ore of aluminum is called
hematite
chalcopyrite
bauxite
halite
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