TS EAPCET (Engineering) Chemical Equilibrium and Acids-Bases — practice questions
80 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice TS EAPCET (Engineering) Chemical Equilibrium and Acids-Bases in the app →According to Le Chatelier's principle, a system at equilibrium that is disturbed will:Adding a catalyst to a reaction at equilibrium has what effect on the equilibrium composition?What happens to Kc of an exothermic reaction when the temperature is raised?For an endothermic reaction, raising the temperature causes the equilibrium constant to:In N2 + 3H2 ⇌ 2NH3 (ΔH = -92.38 kJ/mol), raising the temperature shifts the equilibrium:Argon is added at constant volume to a gaseous equilibrium mixture. The equilibrium:When an equilibrium gas mixture is compressed, the equilibrium shifts toward the side with:Why is ammonia liquefied and removed during its industrial manufacture?H2 is added to H2 + I2 ⇌ 2HI at equilibrium. Qc becomes less than Kc, so the reaction moves:According to Arrhenius, an acid is a substance that in water gives:A limitation of the Arrhenius concept of acids and bases is that it applies only to:Which substance's basicity cannot be explained by the Arrhenius concept?In the Brönsted-Lowry concept, acids are:Why is a bare proton written as H3O+ in aqueous solution?The hydronium ion H3O+ has which shape?According to Lewis, an acid is a species that:Which species acts as a Lewis acid although it contains no proton?Which species can act as a Lewis base?Which scientist defined acids as electron pair acceptors in 1923?In pure water one molecule gives a proton to another. This shows water is:What is the value of Kw for water at 298 K?Why is [H2O] left out of the expression for the ionic product of water?The product [H+][OH-] in water is called the:What is the pH of a 10^-2 M solution of HCl?At 25 °C a basic solution has a pH that is:A solution at 25 °C has [H+] greater than 10^-7 M. It is:For a conjugate acid-base pair, the product Ka × Kb equals:NH4+ has Ka = 5.6 × 10^-10 and NH3 has Kb = 1.8 × 10^-5. Their product is about:What is Ka of NH4+ (the conjugate acid of NH3), given Kb of NH3 = 1.8 × 10^-5?Which is the strongest acid among the hydrogen halides?Which hydride is the strongest acid in the series CH4, NH3, H2O, HF?Down a group, as the size of A in H-A increases, the acid strength:Acids with more than one ionizable proton per molecule are called:For a polyprotic acid, how do Ka2 and Ka3 compare with Ka1?How many ionization constants does the tribasic acid H3PO4 have?Adding acetate ions to an acetic acid solution will:A salt of a strong acid and a strong base gives a solution with pH:A solution of sodium acetate (CH3COONa) in water has a pH:An aqueous solution of NH4Cl is:Which ion does NOT undergo hydrolysis in water?The pH of a salt of a weak acid and a weak base is given by:The degree of hydrolysis of a weak acid and weak base salt depends on its concentration:Hydrolysis of a salt means the interaction of its ions with:A buffer solution is one that:A mixture of NH4Cl and NH4OH acts as a buffer around pH:For BaSO4(s) ⇌ Ba2+ + SO4^2-, the solubility product Ksp equals:Why does the solid BaSO4 not appear in the Ksp expression?Which salt is so soluble that it is hygroscopic?Solubility of an ionic solid depends mainly on lattice enthalpy and:CO + 3H2 ⇌ CH4 + H2O is compressed to half volume. What follows for Qc and direction?At chemical equilibrium, which statement is true?Equilibrium in a physical process is possible only in a:If Kc is greater than 10^3, the equilibrium mixture contains mostly:When Qc > Kc, the net reaction proceeds:When Qc equals Kc, the system:For 2A ⇌ B + C, Kc = 2 × 10^-3 and [A] = [B] = [C] = 3 × 10^-4 M. The reaction goes:In heterogeneous equilibria, a pure solid or liquid has a concentration that is:At equilibrium the Gibbs energy change ΔG is:ΔG° for glucose phosphorylation is +13.8 kJ/mol at 298 K. Kc is about:Sucrose hydrolysis has Kc = 2 × 10^13 at 300 K. ΔG° is about:Raising the concentration of one ion of a saturated salt solution causes:Precipitation of a salt from solution continues until:At equilibrium, all measurable properties of the system:Chemical equilibrium can be reached:A very large Kc (for example H2 with O2 at 500 K) means the reaction:In a diprotic acid solution, H3O+ comes mainly from the:Across a period, the acidity of H-A rises as A becomes more:Acetic acid has Ka of about:Acetate ion in water hydrolyses to give:Ammonium ions undergo hydrolysis with water to form:Buffers of required pH are prepared by controlling the ratio of:Ammonium hydroxide is a weak base with Kb of about:A weak acid, weak base salt solution has pH above 7 when pKa minus pKb is:At constant temperature, compressing a gas mixture to half its volume makes total pressure:The reaction quotient changes on adding a gas only if the gas is:The extent of dissociation of an acid depends on the strength and what of the H-A bond?Activity of the hydrogen ion is a quantity that:In dilute solutions (below 0.01 M), the activity of H+ equals its:Which change alters the numerical value of Kc?A catalyst affects a reversible reaction by: