ESAT ESAT Chemistry

Question 1

What is the molar mass of water (H₂O)?

Accepted Answer

18 g/mol

Answer

16 g/mol

Answer

20 g/mol

Answer

34 g/mol

Question 2

In ESAT Chemistry, what does a higher activation energy indicate?

Accepted Answer

Slower reaction rate

Answer

Faster reaction rate

Answer

Higher product yield

Answer

Exothermic reaction

Question 3

What type of bonding involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bonding

Answer

Ionic bonding

Answer

Metallic bonding

Answer

Hydrogen bonding

Question 4

Which of the following is an example of an oxidation reaction?

Accepted Answer

Mg → Mg²⁺ + 2e⁻

Answer

Fe³⁺ + e⁻ → Fe²⁺

Answer

Cu²⁺ + 2e⁻ → Cu

Answer

Cl₂ + 2e⁻ → 2Cl⁻

Question 5

What is the pH of a solution with [H⁺] = 1 × 10⁻³ mol/L?

Accepted Answer

3

Answer

7

Answer

11

Answer

-3

Question 6

How many moles of NaCl are in 117 g? (Molar mass NaCl = 58.5 g/mol)

Accepted Answer

2 mol

Answer

1 mol

Answer

0.5 mol

Answer

58.5 mol