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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
Hydrocarbons
Which of the following is used in oxy-acetylene torches for welding and cutting metals?
Ethyne
ethene
ethane
methane
Author:
rikazzz
Comment
Hydrocarbons
Which of the following is not true about lighter alkanes?
their combustion can be controlled
they produce large amount of heat per gram
they are expensive and rare
they are widely used as fuel
Author:
rikazzz
Comment
Organic Chemistry
Saturated hydrocarbons (alkanes) have
carbon-carbon single bond
carbon-carbon double bond
carbon-carbon triple bond
carbon-carbon quad bond
Author:
rikazzz
Comment
Hydrocarbons
Acetylene is also called
Ethyne
ethene
ethane
methane
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
The water molecule that donates a proton becomes a
negatively charged hydroxide ion
negatively charged oxygen ion
negatively charged hydrogen ion
positively charged hydronium ion
Author:
rikazzz
Comment
Biochemistry Introduction
Which of the following used the word 'vitamin' for the missing factors that were needed to sustain healthy growth?
C. Eijkman
F.G Hopkins
Casmir Funk
Jabar Bin Hayan
Author:
rikazzz
Comment
Organic Chemistry
A mixture of low boiling hydrocarbons is called
coal
petroleum
natural gas
Liquid Petroleum Gas (LPG)
Author:
rikazzz
Comment
Biochemistry Introduction
What happens if fat-soluble vitamins are taken in excess?
they cause harm
they are readily excreted from the body
they don?t causes any harm
they get stored in body
Author:
rikazzz
Comment
Biochemistry Introduction
Considering the structure of DNA, the strands are held together by
oxygen bonds
carbon bonds
hydrogen bonds
none of above
Author:
rikazzz
Comment
Characteristics of Acids Bases and Salts
What is the main component of digestive juice in the stomach?
hydrochloric acid
sulphuric acid
saliva
water
Author:
rikazzz
Comment
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