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Chemistry
Which gas is released during photosynthesis?
A
Methian
B
Hydrogen
C
Oxygen
D
Nitrogen
Correct Answer
C
Chemistry
NaCl is commonly known as:
A
Baking soda
B
Common salt
C
Washing soda
D
Lime
Correct Answer
B
Chemistry
The nucleus of an atom contains:
A
Neutrons and electrons
B
Electrons only
C
Protons and neutrons
D
Protons
Correct Answer
C
Chemistry
Which element has the symbol Fe?
A
Fluorine
B
Iron
C
Francium
D
Zink
Correct Answer
B
Chemistry
Which is a noble gas?
A
Chlorine
B
Oxygen
C
Helium
D
Hydrogen
Correct Answer
C
Chemistry
The atomic number represents the number of
A
Shells
B
Neutron
C
Protons
D
Molecules
Correct Answer
C
Chemistry
Which acid is found in lemons
A
Citric acid
B
Acetic acid
C
Sulfuric acid
D
Carbonic acid
Correct Answer
A
Chemistry
CO? is called:
A
Carbon monoxide
B
Carbon dioxide
C
Calcium oxide
D
Cobalt oxide
Correct Answer
B
Chemistry
Which particle has a negative charge?
A
Proton
B
Nucleus
C
Neutron
D
Electron
Correct Answer
D
Chemistry
The process of losing electrons is called:
A
Hydrolysis
B
Oxidation
C
Reduction
D
Neutralization
Correct Answer
B