mcq on ph meter

In which of the following ways can zero drift be reduced in pH meters? d) Modern pH meter Formats: Info Page: Quiz: Review: Multiple choice. Explanation: Null-detector type pH meter is the simplest of all pH meters. d) Using balanced and differential amplifiers. Let’s take a look at the most common mistakes we see in using pH meters and what you can do to get the most out of your meter. If a step change is introduced into the system, then the response will be Electrodes give analog signals. Play this game to review Acids & Bases. Eventually the pH becomes constant at 0.70—a point well beyond its value of 1.00 with the addition of 50.0 mL of \(\ce{HCl}\) (0.70 is the pH of 0.20 M HCl). a) Direct voltage from the electrodes is chopped at the main frequency pH indicators are indicators that show the pH value of substances, they change color over the small range of the scale. (A) Ammeter. 1. pH meters can be considered as voltage sources with which of the following internal resistances? In order to eliminate errors no current should flow from the source. Explanation: Null-detector type pH meter has greater accuracy than 0.01 pH. b) False The basic principle of the pH meter is to measure the concentration of hydrogen ions. It is connected in the substation to incoming or outgoing feeders to know how energy is given out or received from other end, or to Transformers on HV n LV side to know the Transformer loss. b) Frequency of the vibrator should be constant Common pH Meter Mistakes and How to Avoid Them. proportional to the pH of the liquid. The measurement range of the PH meter we measure always ranges from 0-14.It is important to know that the lower the number - … The computer in a handheld meter is often more capable than that of a pen-style meter. b) Moderate resistance The speed of the meter disc for a current of 10A at 0.8 pf lagging will be 16.02 Which of the following is not a failure in pH meters? In the adult community sample (n=182) the measure demonstrated convergent validity by showing positive correlations to obsessive and … Trivector meter has 2 types, one is 3 ph 3 wire meter and other is 3 phase 4 wire meter. When the solution is neutral, it has a pH value of 7, when lesser than 7 it is acidic and more than 7 indicates it is basic solution. If you get a stable reading, adjust the pH meter to evaluate buffer’s pH by pressing the measure button a second time. a) Using zero corrected DC amplifier d) Using balanced and differential amplifiers Mcq Added by: Muhammad Bilal Khattak. View Answer, 14. February 08, 2021 c) Amplitude of the vibrator should be constant b) Direct reading type pH meter Small Medium Big Logs Sysop Chain Move Uploads Del Restore RevDel Block Unblock Protect Unprotect Rename Rights Filter User crea. Explanation: Null-detector type pH meter is the simplest of all pH meters. The zero stability of vibrating condenser amplifier type pH meter is much better than a direct coupled amplifier. Ph meter 1. All Rights Reserved. This set of Analytical Instrumentation Multiple Choice Questions & Answers (MCQs) focuses on “pH Meters”. Quiz 8 How does a pH meter work? a) Using filter The pH meter then recognizes the pH buffer in use based on the measured potential and assigns the correct value of the pH buffer based on the measured temperature. 9. d) Both frequency and amplitude of the vibrator should be constant and stable. Therefore, a pH meter requires compensation for small differences from the theoretical slope of potential, which can be done by adjustment using a pH 4 or pH … Portable pH meter: covering an extensive range of regularly employed instruments, the exception is the use of compact DC power equipment can be produced to the scene. c) Using digital design Multiple Choice Questions on pH and Buffer 26. View Answer, 10. May 18, 2017 by admin « Back CONTENTS Next » 1. If you get a stable reading, adjust the pH meter to evaluate buffer’s pH by pressing the measure button a second time. The pH of the sample in the flask is initially 7.00 (as expected for pure water), but it drops very rapidly as \(\ce{HCl}\) is added. Transmit pH readings to a PC for analysis. pH Meters - Troubleshooting Calibration Problems with 12 Practical Steps (Updated April 2020 - Now 16 Practical Steps! a) Null-detector type pH meter b) Direct reading type pH meter c) Digital pH meter d) Modern pH meter. a) Proper insulation A pH meter is used to determine the acidity or alkalinity of the solution. a) Very low resistance One cell B. Save my name, email, and website in this browser for the next time I comment. To verify whether the pH meter has calibrated the correct value of the pH buffer at the measured temperature, refer to the pH vs temperature table on the label of the pH buffer bottle. PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Blue and Yellow) 4.0 out of 5 stars 84. Biology / Life Sciences MCQ: Biochemistry MCQ-11: (Multiple Choice Questions / Model Questions / Sample Questions in Biochemistry: Water and pH Part 1 with detailed answer key, explanations and references for preparing CSIR JRF NET Life Science Examination and also for other competitive examinations in Life Science / Biological Science such as ICMR JRF Entrance Exam, DBT BET JRF … a) 1.8. b) 12.2. c) 5.6. d) 8.8. e) … Get it as soon as Wed, Feb 10. pH is an incredibly important parameter that is measured in nearly every water quality application. c) Amplitude of the vibrator should be constant Many handheld pH meters are waterproof; some are also shockproof. • Calibration • Measurement • Applications • Conclusion • Reference 4. Given below is the block diagram of digital pH meter. Which of the following is not the characteristic of chopper amplifier pH meter? February 08, 2021. In vibrating condenser amplifier type pH meter, to maintain good performance which of the following has to be done? Rinse with deionized water. Ans. The electrodes used in pH measurement have which of the following internal resistances? Though it is not a must, shake the buffer before measuring to shake the other buffers and samples to the similar way. For example, if you want to measure something with a pH of 9 and you only calibrate your pH meter to a single point with pH 7 buffer you may not get the most accurate measurement. d) Modern pH meter. c) Using digital design Free postage. b) Buffer b) Using choppers for high-input resistance gives rise to spikes of waveforms at the output View Answer, 11. Figure 2-1 shows separate measuring and reference electrodes. 7. Given below is the block diagram of digital pH meter. 5. Explanation: pH meters can be considered as voltage sources with very high internal resistance. MCQ on Measuring Instruments – 1. b) does not explain the behavior of di- or tri-basic weak acids c) employs the same value for pK a for all weak acids. 6. c) Continuous indication output $16.97 #22. In which of the following ways can the disadvantages of chopper amplifier type pH meter be overcome? Get it as soon as Wed, Feb 10. b) Giving zero adjustment arrangement More than 7 because sodium carbonate, being a salt of strong base and weak acid, gives alkaline solution due to hydrolysis. c) Thermistor a) Primary electrode,…, Amino-Acid Analyzers Questions & Answers 1. 1 mol/L = 100, pH = 0 (ACIDIC) at a low concentration, e.g. a) Very low resistance View Answer, 9. b) Using modern design 4 Introduction • A pH meter is an electronic instrument used for measuring the pH … 00 ₹999.00 ₹999.00 Explanation: The use of chopper amplifier in pH meter leads to zero instability. Take the Quiz for competitions and exams. FREE Shipping on orders over $25 shipped by Amazon. Explanation: In vibrating condenser amplifier type pH meter, to maintain good performance, both frequency and amplitude of the vibrator should be constant and stable. The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, and so the pH meter is sometimes referred to as a "potentiometric pH meter". FREE Shipping on orders over $25 shipped by Amazon. d) No resistance 1. pH meters can be considered as voltage sources with which of the following internal resistances? Based on the data given in the table above, which of the following pairs of chemical solutions should be used to prepare the buffer solution so that the pH will be between 4 and 7? Explanation: To provide automatic temperature compensation, thermistors must be used. a) Filter This meter has a sensor on a 3-ft. cable for taking remote readings of water and other clean liquids. In which of the following ways can zero drift be reduced in pH meters? pH meter has _____? Q10. Chemistry : Indicators, pH & Litmus Answer the following questions by choosing the most appropriate option. Which of the following is not the characteristic of null-detector type pH meter? b) Calibration for different temperatures This design requires two hands to use, though it is still a highly portable option. General Description. Which of the following is the simplest of pH meters? b) Quick to use View Answer, 12. weak acid strong acid . Because the cell has high internal resistance, the pH meter must have a very high input impedance. c) Digital pH meter AU $14.99. It is used in the place of the mechanical chopper. A pH meter is an scientific device used to measure the activity of hydrogen ions in a solution, which is then expressed as pH. On many meters, these values can be viewed automatically through the Good Laboratory Practice (GLP) screen. February 08, 2021. View Answer. pH meter has _____? d) Defective calibration Setting the pH meter once again will ensure more tuned and accurate readings. Singil sa kuryente may bawas ngayong Pebrero: Meralco. b) Defective input circuitry View Answer, 7. What Is Temperature Compensation Of Ph Meters? Some common indicators are litmus paper, phenolphthalein, Methyl orange, bromothymol blue, etc. A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. d) Magnitude of surge increases in the glass electrode output In vibrating condenser amplifier type pH meter, to maintain good performance which of the following has to be done? Let’s take a look at the most common mistakes we see in using pH meters and what you can do to get the most out of your meter. 2 pH Meter 3. a) True This design requires two hands to use, though it is still a highly portable option. a) Proper insulation Explanation: The disadvantages of chopper amplifier type pH meter can be overcome using a vibrating condenser. We'll assume you're ok with this, but you can opt-out if you wish. View Answer, 6. Pages Articles Chain Redir Volume Diff Diff art Tot. 24. pH of sodium carbonate solution would be less than 7 or more than 7. It plays a role in the taste (acid = fresh, neutral = bland, and alkaline = inedible) and the preservation of food. (B) Voltmeter. Which of the following can be used to provide automatic temperature compensation? Meta File User Others Reedits Chain Revert Reverted Reverted art. c) It leads to stability in DC output of phase-sensitive rectifier a) Defective electrodes 1. pH meters can be considered as voltage sources with which of the following internal resistances? Flow Measurement - MCQs with answers Q1. Desktop pH meter: Same as Portable pH meter. The pH meter measures the voltage and uses a temperature-dependent fac-tor to convert the voltage to pH. b) Defective input circuitry Handheld pH meters have a large display and an electrode at the end of an attached cable. Explanation: If an instrument fails to balance at zero, it is most likely that the electronic circuitry is defective. weak base . A solution containing more H + ions remains acidic while the solution containing more OH-ions remains alkaline. pH 9.20 solution: Weigh 3.81 gram sodium borax (Na2B4O7.10H2O) and dissolve in 1000 ml demineralised water. 2. The pH, mV and °C ranges are easily selected using a membrane key board on the front panel. d) Magnitude of surge increases in the glass electrode output. Explanation: The electrodes used in pH measurement have very high internal resistance. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. The flow meter which is replacing the differential pressure meters in its applications is A. Vortex-shedding flow meter B. Electromagnetic flow meters C. Ultrasonic flow meters D. All of these View Answer / Hide Answer The periodic table, physical constants and relative atomic masses needed for these problems are given on the inside covers of Chemistry, fourth edition by C.E. MCQs on energy meters in electrical measuring instruments is follows 1.The meter constant of a single phase 240V induction watt hour meter is 400 rev per kwh. Which of the following is not the characteristic of chopper amplifier pH meter? c) It is easy to maintain Accept Read More, Combination Electrode Questions & Answers, Combination Electrode Questions & Answers 1. Which of the following is not the characteristic of direct reading type pH meters? PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Blue and Yellow) 4.0 out of 5 stars 84. Hence, A/D converter must be present. However, for most people, a solidly built PH and moisture meter combo will do … $14.99 $ 14. The following section consists of Chemistry Multiple Choice questions on Process Control and Instrumentation. The pH meter standardized with pH _____.- This objective type question with answer for competitive exams is provided by Gkseries. Which of the following can be used to provide automatic temperature compensation? 1. 4 in 1 Soil PH Tester Temperature Moisture Test Meter For Garden Plant Testing. Your Performance 1. b) Moderate resistance Though it is not a must, shake the buffer before measuring to shake the other buffers and samples to the similar way. Microprocessor operates only on digital data. d) D/A converter Hence, pH is defined as hydrogen ion concentration in fluid. pH meter measures acid and base in a fluid. In other words, at a high concentration, e.g. a) Defective electrodes a) Using zero corrected DC amplifier a) Very low resistance b) Moderate resistance … View Answer, 3. $14.99 $ 14. ADVERTISEMENTS: List of 85+ MCQs on soil science ! The short hand notation for the cell is indicated below. ADVERTISEMENTS: 1. Explanation: The zero stability of vibrating condenser amplifier type pH meter is much better than direct coupled amplifier. A buffer solution is prepared by mixing equal volumes of 0.50 M weak acid with 1.0 M of its conjugate base. Identify the unmarked component. A pH meter is an scientific device used to measure the activity of hydrogen ions in a solution, which is then expressed as pH. c) Continuous indication output Explain why pH of 0.1 M solution of HCl is same as that of 0.05 M H 2 SO 4. Which of the following is not the characteristic of direct reading type pH meters? b) Buffer The pH meter should be standardized (calibrated) prior to sample analyses and after every 25 sample analyses. d) Defective calibration. Acids dissolve in … PH to engage more with India, Russia on COVID-19 vaccines: Locsin. The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, and so the pH meter is sometimes referred to as a "potentiometric pH meter". Answer: a. A. Housecroft and E.C. c) It is easy to maintain “Methods of pH Measurement” also specifies that the applicable scope is limited to the “method of measurement by a pH meter using a glass electrode.” Organic Chemistry Interview Questions; Question 3. 11. c) Very high resistance b) Direct reading type pH meter pH Indicators. b) Calibration for different temperatures MCQ on Work Power Energy (pdf) for competitive exams specially for Railway technician, loco pilot, NDA, CDS and IAS. The transfer function of a process is 1/(16s 2 + 8s + 4). As noted above, electrodes don’t last forever. Which of the following meter is an integrating type instrument? Which of the following is not the characteristic of null-detector type pH meter? a) It can be battery operated c) A/D converter c) Defective electronic circuitry Identify the unmarked component. b) Quick to use a) Simple operation Which of the following is the simplest of pH meters? This is because pH measurements are most accurate when multiple calibration points are used to bracket (are above and below) the expected pH value. Offset is simply the mV reading in pH 7 buffer and slope is the mV change per pH unit. 12. A pH meter is an instrument used to measure acidity or alkalinity of a solution. c) It leads to stability in DC output of phase-sensitive rectifier IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Measuring pH is a widely applied technique in various fields and ranges from laboratory measurements to process applications . c) A/D converter b) Using choppers for high-input resistance gives rise to spikes of waveforms at the output 13. What Effect on Hydrostatic Level Transmitter if Liquid Density Changes. a) Null-detector type pH meter c) Keeping the input impedance high 99. Home MCQ Process Control Process Control and Instrumentation MCQ Test - Set 01 Process Control and Instrumentation MCQ Test - Set 01 ... pH meter (B) Polarimeter (C) Chromatograph (D) Polarograph. Hue denotes (A) Dominant spectrum (B) Lightness or brightness (C) Purity ADVERTISEMENTS: (D) Intensity Ans. This website uses cookies to improve your experience. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Remote-Reading pH Meters with PC Output . In the 80’s the company had a mission to provide a pH meter that was affordable, accurate and easy to use. It is also known as the potentiometer type. 3. This concentration is normally expressed in terms of pH which is defined as the logarithm of the reciprocal of the hydrogen ion. d) Its electronic circuits are simple. HI 8314 is a pH/mV/°C meter design for simplicity of use in taking pH, mV (ORP) and temperature measurements. View Answer, 8. d) Thermometer. The capacity can be changed by vibrating one of its plates. d) Using vibrating condenser. Some PH meters will boast multiple types of readings such as sunlight levels and soil temperature, letting you really get into the nitty gritty of caring for your plants for fairly cheap. MCQs on Hydrogen Ion Concentration pH Scale and Buffer Solution The hydrogen ion concentration has a marked effect on the growth of bacteria. This is a physics quiz practice set 1 provided by gkarea.com. The result was the pHep (pH electronic paper). Because the cell has high internal resistance, the pH meter must have a very high input impedance. a) Using filter d) Both frequency and amplitude of the vibrator should be constant and stable b) Moderate resistance Hydrogen ion concentration can also be expressed in terms of pH. The zero stability of vibrating condenser amplifier type pH meter is much better than direct coupled amplifier. Using an expired electrode. Explanation: The unmarked component is A/D converter. 25. View Answer, 13. Common pH Meter Mistakes and How to Avoid Them. If an instrument fails to balance at zero, it is most likely that the electrodes are defective. 14. AU $24.90. c) Very high resistance a) Very low resistance View Answer, 2. It is also known as the potentiometer type. rev. a) Filter Biology / Life Sciences MCQ: Biochemistry MCQ-11: (Multiple Choice Questions / Model Questions / Sample Questions in Biochemistry: Water and pH Part 1 with detailed answer key, explanations and references for preparing CSIR JRF NET Life Science Examination and also for other competitive examinations in Life Science / Biological Science such as ICMR JRF Entrance Exam, DBT BET JRF … View Answer, 5. The flow meter which is replacing the differential pressure meters in its applications is A. Vortex-shedding flow meter B. Electromagnetic flow meters d) Its electronic circuits are simple A pH meter contains a reference electrode, typically saturated calomel electrode and an indicator electrode. It has automatic temperature compensation that standardizes readings at 77° F to prevent inaccurate readings in fluctuating temperatures. d) No resistance a) Direct voltage from the electrodes is chopped at the main frequency pH value of solutions ranges from 1 to 14. Lola patay matapos masagasaan ng pickup truck sa Capiz. To practice all areas of Analytical Instrumentation, here is complete set of 1000+ Multiple Choice Questions and Answers. pH 9.20 solution: Weigh 3.81 gram sodium borax (Na2B4O7.10H2O) and dissolve in 1000 ml demineralised water. (D) Energy metre. c) Keeping the input impedance high Adjust pH a level. 4. This set of Analytical Instrumentation Multiple Choice Questions & Answers (MCQs) focuses on “pH Meters”. Functional electrodes have a slope between 85-105% of the ideal value. Actually, the emf per pH of a glass electrode is not always equal to the value of 2.3026RT/F in the Nernst equation. Explanation: Defective calibration is not a failure in pH meters. 8. Multiple Choice Questions on pH and Buffer 26. A pH scale reading of 2 indicates a _____. d) D/A converter. Premium Digital PH Meter / TDS Tester Aquarium Pool SPA Water Quality Monitor AU. b) Giving zero adjustment arrangement The indicator electrode contains a glass membrane, Ag/AgCl reference electrode and a certain concentration of H + ([H +] ref). c) Digital pH meter General Description. Which of the following is not a failure in pH meters? Measuring pH is a widely applied technique in various fields and ranges from laboratory measurements to process applications . PH is critical to the maintenance of human life and affects everything from the fertility of soils to the health of marine life. Errors may also occur due to leakage of capacitance. If an instrument fails to balance at zero, it is most likely that the electrodes are defective. pH is the concentration of hydrogen ions in the solution. The computer in a handheld meter is often more capable than that of a pen-style meter. The indicator is a chemical detector used to detect the hydrogen ions (H+) and hydroxyl ions (OH-) in a solution. Process Control and Instrumentation Process Control and Instrumentation. Lab Tests Guide (LTG) is an health information website designed to help patients and health care providers to understand the many lab tests and related diseases. Which of the following is the simplest of pH meters? 3 Content • Introduction • History • Principle • Construction of a pH meter • Types of pH meter • Types of probe / electrode. b) It has less accuracy PH meter, electric device used to measure hydrogen-ion activity (acidity or alkalinity) in solution.Fundamentally, a pH meter consists of a voltmeter attached to a pH-responsive electrode and a reference (unvarying) electrode. (C) Wattmeter. Many handheld pH meters are waterproof; some are also shockproof. © 2011-2021 Sanfoundry. PH Meter with Automatic Calibration - 7Pros High Accuracy Pen Type Water Quality Tester with built-in ATC, 6 pH Calibration Packets, Best Tool to test PH of Hydroponics, Kombucha, Wine, Drinking Water 4.0 out of 5 stars 680. The pH meter measures the voltage and uses a temperature-dependent fac-tor to convert the voltage to pH. View Answer, 4. In this page you can learn various important energy meter multiple choice questions answers,mcq on energy meter with answers,mcq on energy meter,sloved energy meter objective questions answers, energy meter multiple choice questions answers etc. b) It has less accuracy This meter used an integrated circuit to measure the voltage response of a pH electrode packaged into a pocket-sized meter. Free postage. As noted above, electrodes don’t last forever. c) Defective electronic circuitry b) Using modern design • A pH meter provides a value as to how acidic or alkaline a liquid is. a) Simple operation Setting the pH meter once again will ensure more tuned and accurate readings. Adjust pH a level. A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. The offset should be ±30mV. Failure occurs due to defective electrodes, defective input circuitry and defective electronic circuitry. A pH meter must be calibrated before each use to ensure accurate measurements. This will help you to learn about the frequently asked objective type questions on soil science especially compiled for ICAR, ARS, IARI Ph.D and other competitive exams. Remove the electrodes from the pH 4 buffer solution where they have been soaking for at least one day. 10. 10-14 mol/L, pH = 14 (ALKALINE) Hence, different substances are objectively compared with each other, where pH 0 is extremely acidic, pH 14 extremely alkaline, and pH 7 neutral. pH meter design and working principle 1. pH METER DESIGN AND WORKING 2.
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