ESAT Chemistry Flashcards
6 cards from real ESAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ESAT Chemistry flashcards as text
What does Le Chatelier's Principle state in chemical equilibrium?
Answer: A system at equilibrium will shift to oppose any imposed change
Le Chatelier's Principle states that a system at equilibrium responds to a stress by shifting to minimise that stress.
In ESAT Chemistry, what is the first ionisation energy?
Answer: Energy to remove one electron from a gaseous atom
First ionisation energy is the energy needed to remove one mole of electrons from one mole of gaseous atoms.
What shape does a molecule with 4 bonding pairs and no lone pairs adopt?
Answer: Tetrahedral
VSEPR theory predicts a tetrahedral geometry for 4 bonding pairs with no lone pairs (e.g., CH₄).
Which functional group characterises an alcohol?
Answer: -OH (hydroxyl)
Alcohols contain the -OH (hydroxyl) functional group attached to a carbon atom.
What is Avogadro's constant?
Answer: 6.022 × 10²³ mol⁻¹
Avogadro's constant is 6.022 × 10²³ mol⁻¹, the number of particles in one mole.
What type of reaction converts alkenes to alkanes using hydrogen gas?
Answer: Hydrogenation
Hydrogenation adds H₂ across the double bond of an alkene, converting it to an alkane.