Multiple Choice Question
1. What is the atomic number of Carbon?
A) 12
B) 6
C) 14
D) 8
Answer: B) 6
2. Which of the following is a noble gas?
A) Oxygen
B) Nitrogen
C) Argon
D) Chlorine
Answer: C) Argon
3. The molecular formula of water is:
A) H2O
B) H2O2
C) H2SO4
D) HO
Answer: A) H2O
4. Avogadro’s number is:
A) (6.022 \times 10^{23})
B) (6.022 \times 10^{22})
C) (6.022 \times 10^{24})
D) (6.022 \times 10^{21})
Answer: A) (6.022 \times 10^{23})
5. Which element has the highest electronegativity?
A) Oxygen
B) Fluorine
C) Nitrogen
D) Chlorine
Answer: B) Fluorine
6. What is the chemical symbol for Potassium?
A) P
B) Pt
C) K
D) Po
Answer: C) K
7. Which type of bond involves the sharing of electrons?
A) Ionic
B) Covalent
C) Metallic
D) Hydrogen
Answer: B) Covalent
8. The pH of a neutral solution at 25°C is:
A) 7
B) 14
C) 1
D) 0
Answer: A) 7
9. Which gas is commonly known as laughing gas?
A) CO2
B) N2O
C) NO
D) NH3
Answer: B) N2O
10. In which state of matter are molecules closest together?
A) Solid
B) Liquid
C) Gas
D) Plasma
Answer: A) Solid