10 multiple-choice questions related to chemistry

1,What is the atomic number of carbon?
A) 6 
B) 12 
C) 14 
D) 16 

2,Which of the following is a noble gas?
A) Oxygen 
B) Nitrogen 
C) Argon 
D) Hydrogen 

3,What type of bond involves the sharing of electron pairs between atoms?
A) Ionic bond 
B) Covalent bond 
C) Metallic bond 
D) Hydrogen bond 

4,Which of the following represents a strong acid?
A) HCl 
B) CH₃COOH 
C) NH₃ 
D) H₂CO₃ 

5,What is the pH of a neutral solution at 25°C?
A) 0 
B) 7 
C) 14 
D) 10 

6,Which of the following elements is a transition metal?
A) Sodium 
B) Calcium 
C) Iron 
D) Aluminum 

7,What is the molar mass of water (H₂O)?
A) 16 g/mol 
B) 18 g/mol 
C) 20 g/mol 
D) 22 g/mol 

8,Which of the following reactions is an example of a combustion reaction?
A) H₂ + O₂ → H₂O 
B) C₃H₈ + O₂ → CO₂ + H₂O 
C) Na + Cl₂ → NaCl 
D) CaCO₃ → CaO + CO₂ 

9,What is the primary intermolecular force in hydrogen fluoride (HF)?
A) London dispersion forces 
B) Dipole-dipole interactions 
C) Hydrogen bonding 
D) Ionic bonding 

10, Which of the following compounds is an example of a salt?
A) NaCl 
B) H₂O 
C) CH₄ 
D) C₆H₁₂O₆ 

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