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NEET UG Physical Chemistry Flashcards
52 question-and-answer cards covering Physical Chemistry as it is examined in NEET UG. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Physical Chemistry deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
State the third law of thermodynamics.
The entropy of a perfect crystalline substance is zero at absolute zero (0 K).
State Hess's law of constant heat summation.
The total enthalpy change of a reaction is the same whether it occurs in one step or several steps; enthalpy is a state function.
Define enthalpy of combustion.
The enthalpy change when one mole of a substance is completely burnt in excess oxygen; it is always negative (exothermic).
Define enthalpy of formation.
The enthalpy change when one mole of a compound is formed from its elements in their standard states.
Write the relation between Kp and Kc for a gaseous equilibrium.
Kp = Kc (RT)^(delta n_g), where delta n_g = moles of gaseous products minus moles of gaseous reactants.
State Le Chatelier's principle.
If a system at equilibrium is disturbed by a change in concentration, pressure or temperature, the equilibrium shifts to counteract the change.
Define pH and give the formula.
pH = -log[H+]; it measures the acidity of a solution. Neutral pH = 7 at 25 C.
What is the ionic product of water (Kw) at 25 C?
Kw = [H+][OH-] = 1.0 x 10^-14 at 25 C.
State the common ion effect.
The suppression of ionization of a weak electrolyte by adding a strong electrolyte that shares a common ion.
Write the Henderson-Hasselbalch equation for an acidic buffer.
pH = pKa + log([salt]/[acid]).
State Raoult's law for a solution of two volatile liquids.
The partial vapour pressure of each component is proportional to its mole fraction: P_total = P_A x_A + P_B x_B.
Name the four colligative properties.
Relative lowering of vapour pressure, elevation of boiling point, depression of freezing point, and osmotic pressure.
Write the formula for osmotic pressure.
pi = CRT = (n/V)RT, where C is molar concentration of solute.
State Henry's law for gas solubility.
The solubility (mole fraction) of a gas in a liquid is directly proportional to its partial pressure: p = K_H x.
What is the van't Hoff factor (i) and what does i > 1 indicate?
i = observed colligative property / calculated value; i > 1 indicates dissociation of the solute.
What is the difference between physisorption and chemisorption?
Physisorption involves weak van der Waals forces, is reversible and low-enthalpy; chemisorption involves chemical bonds, is irreversible and high-enthalpy.
What is the Tyndall effect?
The scattering of light by colloidal particles, making the path of a light beam visible through a colloid.
Define an emulsion and give an example.
A colloidal dispersion of one liquid in another immiscible liquid; e.g. milk (oil/fat in water).
Write the Nernst equation for an electrode at 298 K.
E = E° - (0.059/n) log Q, where n is the number of electrons transferred and Q is the reaction quotient.
State Faraday's first law of electrolysis.
The mass of substance deposited at an electrode is directly proportional to the quantity of electricity (charge) passed through the electrolyte.
How is the EMF of a cell calculated from electrode potentials?
E°cell = E°cathode - E°anode (both as reduction potentials).
What is the integrated rate equation for a first-order reaction?
k = (2.303/t) log([A0]/[A]); the half-life t(1/2) = 0.693/k is independent of initial concentration.
State the Arrhenius equation relating rate constant to temperature.
k = A e^(-Ea/RT), where A is the pre-exponential factor and Ea is the activation energy.
What is the n-factor and oxidation number change for an oxidizing agent in a redox reaction?
An oxidizing agent gains electrons and is reduced; its oxidation number decreases. The n-factor equals the number of electrons gained per molecule.
What this deck covers
The Physical Chemistry deck follows the NEET UG Physical Chemistry syllabus — 8 chapters and 97 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 6.5 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 101 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Physical Chemistry flashcards FAQ
How many Physical Chemistry flashcards are in this NEET UG deck?
52 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these NEET UG flashcards free?
Yes. The preview here is free to read with no signup, and the full 52-card deck is free inside the Examius app.
What do the Physical Chemistry cards cover?
They follow the NEET UG Physical Chemistry syllabus — 8 chapters and 97 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.