General Chemistry Principles Flashcards
7 cards from real OAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General Chemistry Principles flashcards as text
Which of the following best describes the relationship between Kp and Kc for a gas-phase reaction?
Answer: Kp = Kc(RT)^Δn
The relationship is Kp = Kc(RT)^Δn, where Δn is the change in moles of gas (products minus reactants).
What type of radioactive decay results in an increase in atomic number by 1?
Answer: Beta-minus decay
In beta-minus decay, a neutron is converted to a proton, emitting an electron, which increases the atomic number by 1.
A 1 L solution contains 0.5 mol of HF (Ka = 7.2 × 10⁻⁴). Compared to 0.5 M HCl, the HF solution has:
Answer: A higher pH
HF is a weak acid that only partially dissociates, producing fewer H⁺ ions than strong acid HCl at the same concentration, resulting in a higher pH.
Which of the following has the greatest electronegativity?
Answer: F
Fluorine has the highest electronegativity (3.98 on the Pauling scale) of all elements.
The standard electrode potential (E°) of a cell reaction is +1.10 V. This reaction is:
Answer: Spontaneous, ΔG° < 0
A positive E°cell corresponds to a negative ΔG° (ΔG° = −nFE°), indicating a spontaneous reaction under standard conditions.
Which law states that at constant temperature, the volume of a gas is inversely proportional to its pressure?
Answer: Boyle's Law
Boyle's Law states that P₁V₁ = P₂V₂ at constant temperature, showing an inverse pressure-volume relationship.
Which of the following is a colligative property?
Answer: Osmotic pressure
Osmotic pressure is a colligative property because it depends only on the number of solute particles, not their identity.