Physical test IIbest of luck 1 / 50In the Nernst equation, the term "n" represents: a) Gas constant b) Valency of ions c) Faraday's constant d) Temperature 2 / 50Which electrode is NOT used in potentiometry? a) Glass electrode b) Saturated Calomel Electrode c) Platinum electrode d) Spectrophotometer 3 / 50Which of the following is NOT an application of potentiometry? a) Measuring blood glucose b) Determining soil nitrate c) Analyzing water fluoride d) Measuring atmospheric pressure 4 / 50The primary use of potentiometry in clinical chemistry is to measure: a) Blood pressure b) Electrolytes (Na⁺, K⁺, Cl⁻) c) Cholesterol levels d) Hemoglobin content 5 / 50Which of the following is a characteristic of a good salt bridge electrolyte? a) High reactivity b) Inertness c) Low solubility d) Colored 6 / 50The electrode potential of a Standard Hydrogen Electrode (SHE) is: a) +0.2422 V b) 0 V c) -0.762 V d) +1.0 V 7 / 50Which of the following is NOT a reference electrode? a) Standard Hydrogen Electrode (SHE) b) Glass electrode c) Silver-Silver Chloride electrode d) Saturated Calomel Electrode 8 / 50The potential difference in potentiometry arises due to: a) Mixing of two solutions b) Redox reactions at electrodes c) Temperature changes d) Pressure changes 9 / 50Potentiometry is used to determine: a) Color of the solution b) Unknown concentration of solute c) Density of the solution d) Viscosity of the solution 10 / 50What is the primary condition under which potential is measured in potentiometry? a) High current flow b) No current flow c) Alternating current flow d) Constant current flow 11 / 50What does the peak current in cyclic voltammetry depend on Scan rate Temperature pH All 12 / 50Which electrode is used as the working electrode in voltammetry Platinum electrode Glass electrode Calomel electrode Saturated Ag/AgCl electrode 13 / 50 What is voltammetry A technique to measure current as a function of applied potential A method to measure pH of a solution A type of chromatography A spectroscopic technique 14 / 50What is the purpose of a reference electrode in voltammetry? To provide a stable potential for measurement To generate current To act as the counter electrode To measure pH 15 / 50 Which of the following is a limitation of voltammetry Requires high sample volume Limited to conductive solutions Cannot detect trace metals Only works for organic compounds 16 / 50Which of the following is NOT a type of voltammetry? Linear sweep voltammetry Differential pulse voltammetry Atomic absorption voltammetry Square wave voltammetry 17 / 50What is the role of the counter electrode in voltammetry To measure current To provide a reference potential To complete the circuit To control pH 18 / 50What is the Nernst equation used for in voltammetry? Relating potential to concentration Calculating current Measuring pH Determining scan rate 19 / 50Which of the following is NOT a factor affecting voltammetric response? Electrode material Scan rate Solution pH Magnetic field 20 / 50What does a large peak separation in cyclic voltammetry indicate Slow electron transfer kinetics Fast electron transfer kinetics Reversible reaction No reaction 21 / 50The energy released in nuclear reactions comes from Breaking chemical bonds Mass converted to energy (E=mc²) Electron transitions Friction 22 / 50 Which of the following is used in smoke detectors Uranium-235 Cobalt-60 Cobalt-60 Americium-241 23 / 50Which nuclear reaction is used in atomic bombs Nuclear fission Nuclear fusion Radioactive decay alpha decay 24 / 50What is the charge of a beta particle +1 0 -1 -2 25 / 50 The unit of radioactivity is Joule Curie Newton Watt 26 / 50Which of the following is a moderator in nuclear reactors Heavy water (D₂O) U-238 lead cadmium 27 / 50Which type of radiation is deflected towards the negative plate in an electric fieldal alpha beta gamma neutron 28 / 50Which of the following is used as a control rod material in nuclear reactors Uranium Plutonium Cadmium Thorium 29 / 50 Which particle has the least ionizing power? alpha beta gamma neutron 30 / 50Which isotope is commonly used in carbon dating? C-11 C-12 C-14 C-13 31 / 50In nuclear fission, a heavy nucleus splits into smaller nuclei along with the release of electron Neutrons and energy proton Only gamma rays 32 / 50The half-life of a radioactive isotope is the time required for: All nuclei to decay Half of the nuclei to decay The radiation to reduce by half The nucleus to split into two 33 / 50What happens to the atomic number (Z) of a nucleus when it emits a beta particle (β⁻)? Decreases by 1 Increases by 1 remains same Decreases by 2 34 / 50An alpha particle is identical to A proton A helium nucleus (He²⁺) An electron A neutron 35 / 50Which type of radiation has the highest penetrating power alpha beta gamma neutron 36 / 50 What is the process by which an unstable nucleus emits radiation Oxidation Nuclear fission Radioactive decay Nuclear fusion 37 / 50 The emf of a cell depends on Electrode size Nature of electrolyte Concentration of ions All 38 / 50Which metal is used for galvanization to prevent rusting? Cu Ni Al Zn 39 / 50Which of the following is a secondary cell? Mercury cell Nickel-cadmium cell Dry cell Zinc-carbon cell 40 / 50The electrolyte used in a lead-acid battery is: NaOH NaCl H2SO4 KOH 41 / 50The relationship between Gibbs free energy (ΔGΔG) and cell potential (EE) is: ΔG=−nFE ΔG=nFE ΔG=−RTlnK ΔG=RTlnK 42 / 50The process of coating a metal with another metal using electrolysis is called Galvanization Electroplating Anodization Cathodic protection 43 / 50Which of the following is NOT a primary cell? Leclanché cell Daniel cell Lead-acid battery Dry cell 44 / 50During electrolysis of molten NaCl, the product at the cathode is: Cl₂ Na NaOH H₂ 45 / 50The unit of electrochemical equivalent (Z) is g/C C/g mol/L V/A 46 / 50The Nernst equation is given by E=E∘−RT/nFlnQ E=E∘+RT/nFlnQ E=E∘−RT/n lnQ E=E∘−T/nFlnQ 47 / 50The salt bridge in a galvanic cell is used to: Provide electrical connection Prevent polarization Maintain electrical neutrality Increase cell voltage 48 / 50Which of the following is a strong oxidizing agent Li⁺ F₂ Na⁺ K 49 / 50The standard hydrogen electrode (SHE) has a fixed potential of 0 +1 -1 2 50 / 50In a galvanic cell, oxidation occurs at cathode anode Salt bridge electrolyte Your score isThe average score is 70% 0% Restart quiz
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