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🇵🇰 BS Nursing Entry Test · flashcards
BS Nursing Entry Test Chemistry Flashcards
50 question-and-answer cards covering Chemistry as it is examined in BS Nursing Entry Test. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Chemistry deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
What is ionic (electrovalent) bonding?
A bond formed by the complete transfer of electrons from a metal to a non-metal, producing oppositely charged ions held together by electrostatic attraction.
Give a typical example of an ionic compound and the ions formed.
Sodium chloride (NaCl): Na loses one electron to form Na⁺, and Cl gains one electron to form Cl⁻.
List two characteristic properties of ionic compounds.
High melting and boiling points; conduct electricity when molten or dissolved in water (not when solid).
What is covalent bonding?
A bond formed by the mutual sharing of electron pairs between two non-metal atoms.
Distinguish between a single, double, and triple covalent bond.
Single bond = 1 shared pair (2 electrons), double = 2 shared pairs (4 electrons), triple = 3 shared pairs (6 electrons).
What is the difference between polar and non-polar covalent bonds?
Polar covalent bonds form between atoms of different electronegativities (unequal sharing); non-polar covalent bonds form between atoms of equal/similar electronegativity (equal sharing).
What is a coordinate (dative) covalent bond?
A covalent bond in which both shared electrons are donated by a single atom (e.g., NH₄⁺, H₃O⁺).
What is hydrogen bonding?
A relatively strong intermolecular attraction between a hydrogen atom bonded to a highly electronegative atom (N, O, or F) and a lone pair on another electronegative atom.
Why does water have an unusually high boiling point compared to other Group 16 hydrides?
Because of extensive hydrogen bonding between water molecules, which requires extra energy to break.
What does VSEPR theory predict?
The shape (geometry) of a molecule based on the repulsion between electron pairs around the central atom, which arrange themselves as far apart as possible.
What are the shapes and bond angles of CH₄ (methane) and H₂O (water)?
CH₄ is tetrahedral (109.5°). H₂O is bent/angular (about 104.5°) due to two lone pairs.
What are the shapes of CO₂ and NH₃?
CO₂ is linear (180°); NH₃ is trigonal pyramidal (about 107°).
State the postulates of the Kinetic Molecular Theory for an ideal gas (any two).
Gas particles are in constant random motion; their volume is negligible compared to container volume; collisions are perfectly elastic; there are no intermolecular forces; average kinetic energy is proportional to absolute temperature.
State Boyle's Law and its equation.
At constant temperature, the volume of a fixed mass of gas is inversely proportional to its pressure. P₁V₁ = P₂V₂.
State Charles's Law and its equation.
At constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute temperature. V₁/T₁ = V₂/T₂.
Write the ideal gas equation and identify each term.
PV = nRT, where P = pressure, V = volume, n = number of moles, R = gas constant, T = absolute temperature (Kelvin).
List two characteristic properties of the liquid state.
Definite volume but no definite shape (takes the shape of its container); particles are close together but can move/slide past one another.
What is evaporation, and how does it differ from boiling?
Evaporation is the change from liquid to vapor occurring only at the surface at any temperature; boiling occurs throughout the liquid at a fixed boiling point when vapor pressure equals atmospheric pressure.
Compare the two types of solids: crystalline vs amorphous.
Crystalline solids have a regular, ordered arrangement of particles and sharp melting points (e.g., NaCl, diamond); amorphous solids have irregular arrangement and no sharp melting point (e.g., glass, plastic).
Define enthalpy change (ΔH) of a reaction.
The heat energy absorbed or released by a reaction at constant pressure. ΔH = H(products) - H(reactants).
State Hess's Law.
The total enthalpy change for a reaction is the same regardless of the route taken, provided the initial and final conditions are the same (energy is conserved/a state function).
Distinguish between exothermic and endothermic reactions by their ΔH sign and energy flow.
Exothermic reactions release heat to the surroundings and have a negative ΔH. Endothermic reactions absorb heat from the surroundings and have a positive ΔH.
What is a reversible reaction, and what is dynamic equilibrium?
A reversible reaction can proceed in both forward and reverse directions. Dynamic equilibrium is reached when the forward and reverse reaction rates are equal, so concentrations remain constant.
State Le Chatelier's Principle and predict the effect of increasing pressure on a gaseous equilibrium.
If a stress (change in concentration, temperature, or pressure) is applied to a system at equilibrium, the equilibrium shifts to counteract that change. Increasing pressure shifts the equilibrium toward the side with fewer gas moles.
What this deck covers
The Chemistry deck follows the BS Nursing Entry Test Chemistry syllabus — 10 chapters and 33 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 5.0 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 143 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.
Chemistry flashcards FAQ
How many Chemistry flashcards are in this BS Nursing Entry Test deck?
50 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these BS Nursing Entry Test flashcards free?
Yes. The preview here is free to read with no signup, and the full 50-card deck is free inside the Examius app.
What do the Chemistry cards cover?
They follow the BS Nursing Entry Test Chemistry syllabus — 10 chapters and 33 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.