BasicsStoichiometry #Elements161Choose the best answerWhich statement correctly describes an element?AIt contains only one type of atomBIt can be broken into simpler substances by ordinary chemical reactionsCIt must always exist as moleculesDIt is always a metal Like 0 Discuss 0Share
UHS MDCAT 2024 Chemistry#Boiling Point#Liquids162Choose the best answerBoiling point of a liquid is a temperature at which:ASurface tension is greater than the atmospheric pressureBViscosity is less than the atmospheric pressureCVapour pressure equals the atmospheric pressureDViscosity equals the atmospheric pressure Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryFunctional Groups163Choose the best answerWhich matching of functional groups with their classes is correct? (1) R–X (2) R–O–R (3) R–NH₂ (4) R–SHA1–Haloalkane, 2–Ether, 3–Amine, 4–ThiolB1–Ether, 2–Haloalkane, 3–Thiol, 4–AmineC1–Amine, 2–Ether, 3–Haloalkane, 4–ThiolD1–Haloalkane, 2–Thiol, 3–Amine, 4–Ether Like 0 Discuss 0Share
Periodic TableAtomic Radius Trend164Choose the best answerAcross a period, atomic radius generally:AIncreasesBRemains unchangedCDecreasesDFirst increases and then always doubles Like 0 Discuss 0Share
Carboxylic AcidsAcidic Character and Inductive Effect165Choose the best answerThe correct decreasing order of acid strength is:AFCH₂COOH > ClCH₂COOH > BrCH₂COOHBFCH₂COOH > BrCH₂COOH > ClCH₂COOHCFCH₂COOH < ClCH₂COOH < BrCH₂COOHDBrCH₂COOH > FCH₂COOH > ClCH₂COOH Like 0 Discuss 0Share