ESAT ESAT Chemistry 2

Question 1

What does Le Chatelier's Principle state in chemical equilibrium?

Accepted Answer

A system at equilibrium will shift to oppose any imposed change

Answer

Equilibrium always favours the forward reaction

Answer

Catalysts shift equilibrium to the right

Answer

Temperature has no effect on equilibrium position

Question 2

In ESAT Chemistry, what is the first ionisation energy?

Accepted Answer

Energy to remove one electron from a gaseous atom

Answer

Energy released when one electron is gained

Answer

Energy to break one mole of bonds

Answer

Energy required to melt one mole of a substance

Question 3

What shape does a molecule with 4 bonding pairs and no lone pairs adopt?

Accepted Answer

Tetrahedral

Answer

Trigonal planar

Answer

Linear

Answer

Bent

Question 4

Which functional group characterises an alcohol?

Accepted Answer

-OH (hydroxyl)

Answer

-COOH (carboxyl)

Answer

-NH₂ (amino)

Answer

-CHO (aldehyde)

Question 5

What is Avogadro's constant?

Accepted Answer

6.022 × 10²³ mol⁻¹

Answer

6.022 × 10²² mol⁻¹

Answer

1.38 × 10⁻²³ mol⁻¹

Answer

9.81 × 10²³ mol⁻¹

Question 6

What type of reaction converts alkenes to alkanes using hydrogen gas?

Accepted Answer

Hydrogenation

Answer

Halogenation

Answer

Hydrolysis

Answer

Oxidation