Chemistry Basics - Practice Set 1
Cybersecurity • 12 Questions
1
What is the chemical symbol for water?
A.
H₂O
B.
CO₂
C.
NaCl
D.
O₂
2
What is the atomic number of carbon?
A.
4
B.
6
C.
8
D.
12
3
What is the pH of pure water?
A.
5
B.
6
C.
7
D.
8
4
What is the most abundant gas in Earth's atmosphere?
A.
Oxygen
B.
Carbon dioxide
C.
Nitrogen
D.
Argon
5
What is the formula for table salt?
A.
NaCl
B.
KCl
C.
CaCl₂
D.
MgCl₂
6
What is the process of a liquid turning into a gas called?
A.
Condensation
B.
Evaporation
C.
Sublimation
D.
Freezing
7
What is the valency of oxygen?
A.
1
B.
2
C.
3
D.
4
8
What type of bond is formed when electrons are shared?
A.
Ionic
B.
Covalent
C.
Metallic
D.
Hydrogen
9
What is the molecular formula for methane?
A.
CH₃
B.
CH₄
C.
C₂H₆
D.
C₃H₈
10
What is Avogadro's number?
A.
6.02 × 10²²
B.
6.02 × 10²³
C.
6.02 × 10²⁴
D.
6.02 × 10²⁵
11
What is the chemical symbol for gold?
A.
Go
B.
Gd
C.
Au
D.
Ag
12
What is the atomic number of hydrogen?
A.
0
B.
1
C.
2
D.
3