1. Tools that do not need to be brought when sampling is… a. thermometer b. Hygrometer c. PH meter d. DO meter
Q: O The job of splitter in GC is taking part of the sample. O Column in GC should be placed in a…
A: Introduction Splitter as the name suggests splits the sample. It controls the amount of sample that…
Q: J A positive result for Fohl's test is the formation of a black precipitate in the form of lead. O A…
A: Fohl's Tests - This test is performed to detect the presence of amino acids containing sulfur. The…
Q: Why are we using this materials and centrifuging at 15000 rpm? Lipid peroxidation experiment:…
A: The oxidative degeneration of lipids refers to lipid peroxidation, where the electrons from the…
Q: Which of the following is not a stage in purification of drinking water?a. filtration b.…
A: Sewage or waste water is the water which is polluted by the human population by the action of…
Q: CITRATE UTILIZATION TEST WAS PERFORMED IN A CULTURE MEDIA WHICH CONTAIN A STRONG BUFFER. AND EVEN A…
A: In this test citrate agar is used, where citrate is carbon source and NH4and ability of organism to…
Q: What precautions should we follow when conducting experiment in Environmental lab?
A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…
Q: 1. On a spot plate, put a pH paper on each well. Place 2 drops of liquid samples on different wells.…
A: pH, (pH=-log [H+]) is the quantitative measure of the acidity or basicity of aqueous or other…
Q: Explain why the following steps are essential during subculturing:a. Flaming the inoculating…
A: A microbial culture made by transferring the cells from the previous/old culture medium into a fresh…
Q: Three water samples namely river water, untreated sewage water and secondary effluent discharged…
A: BOD or biological oxygen demand refers to amount of oxygen that is required by microorganisms in…
Q: A fuel is fired with a coal with the following proximate analysis: 5% M, 60% FC, 25% VCM, 10% ash.…
A:
Q: 1. One mL of sludge was added to a 99 mL dilution blank. Three 1/10 dilutions were then made. From…
A: CFU/ml represents the number of colony-forming units in the sample. It gives us the estimation of…
Q: Which of the following is TRUE about the Nitrate Reduction test? Question 1 options: A Nitrate…
A: According to the question, we have to mention Which of the following is TRUE about the Nitrate…
Q: Explain the reason for each of the following rules regarding micropipettes. a) Always set the…
A: A micropipette is a laboratory Instrument used to transfer precise and accurate volumes of…
Q: Directions: Suspend 28.0 grams in the 1000 mL distilled water. Heat to boiling to dissolve the…
A: An agar plate is a petri dish used to cultivate microorganisms that is made out of a growth media…
Q: A 0.897 g sample containing the chloride ion is treated with excess lead(II) nitrate. The…
A: Lead(II) Chloride (PbCl2) is an organic compound which is a white solid under ambient conditions. It…
Q: Which objective should always be in place at the beginning of observing a specimen? O A) low (4X) B)…
A: An objective lens is one of the lenses present in a compound microscope. The objective lens are…
Q: You want to pipette 250uL of a sample in the lab. Which pipetter do you use? O p20 O p200 Op2 O…
A: Pipetter It is a laboratory tool commonly used in chemistry, biology and medicine to transport a…
Q: Which statement(s) describe(s) a microplate reader? A. It is spectrophotometer B. It can read the…
A: Introduction : microplate reader is used to detect biological, chemical and physical events of…
Q: Explain this example of the following water quality serial dilution. Note the dilution factors and…
A: Given information TNTC - Too many to count in plate 1:1 TNTC- in plate 1:10 10 cfu's= 1:100 1 cfu's…
Q: The blood sprayed on the surface of liquid nitrogen is .A appealing method .B Thin wall method .c…
A: Cryosurgery is a type of surgery where there is rapid freezing of tissues or freezing of tissues by…
Q: Which of the following is FALSE about the Nitrate Reductaion Test, procedure and interpretation?…
A: Among the many biochemical tests conducted on unknown bacterial isolates to identify them, nitrate…
Q: Which of the following is considered chemical control? O a. None O b. Heat, alcohols, ethylene oxide…
A: Chemical control is way to restricting the growth of pathogens. It is based on substances that are…
Q: To achieve a hundred fold dilution you would add _____ microliters of sample to the appropriate…
A: The dilution method is used to achieve the desired concentration of the sample in a tube or a…
Q: feeding formulas
A: Tube feeding formula is a formula that is designed for children or adults in order to provide…
Q: .C The liquid-in-glass thermometers
A:
Q: Electrostatic precipitators or wet scrubbers can be used to reduce pollution. O particulate matter…
A: Pollution caused by industrial activities and combustion is of great concern Various abatement…
Q: a. Always hold a loaded micropipette in a vertical position e. Always release the plunger slowly f.…
A: Micropippet is a pipette used to transfer or injust very small or minute volumes of liquid. These…
Q: 1. List the glassware/s and equipment you needed to measure 3.0915 grams of ZnCl 2 and dissolve it…
A: Introduction To conduct an experiment with precision and accuracy, the right apparatus and types of…
Q: Sludge that has been completely combined with water is recycled activated sludge. What are the…
A: ACTIVATED SLUDEGE BASICS- The activated sludge process is a biological wastewater treatment process…
Q: Justifythe importance to have full characteristics test off water sample before proceed with the…
A: Water has great importance in perspective of biological system.it act as an universal solvent many…
Q: A test procedure calls for 5 mL of undiluted specimen. 2 mL of a 1:50 dilution is used. The answer…
A: Dilution is a procedure of reducing the concentration of a sample. This is usually performed by…
Q: A physician request 2.5 L of a35% solution the pharmacy has 12.5% and 45% solution in stock what…
A: The dilution is the process of decreasing the concentration of a solute in a solution, usually…
Q: A sample of pond water is tested using the most probable number method. There are 3 positive tubes…
A: Given , 10 mL - 3 positive tube 1 mL - 1 positive tube 0.1 mL - 1 positive tube
Q: Suggest one reason why syringes are used in vitamin C content of food and drink investigation…
A: A surgical instrument that allows to administer or remove the fluid. A medicinal syringe is made up…
Q: The methods of heat therapy are...? * O Conductive heating All the above O Ultrasonic wave heating
A: Heat therapy is also known as thermotherapy. It involves the application of heat for getting relief…
Q: 7. A thermometer reading 75°F is taken out where the temperature is 20°F. The reading is 30°F, 4…
A: The thermodynamic temperature (also called average kinetic energy) measures the average energy of…
Q: metal control agents and describe their most common applications.
A: Heavy metals can be used as antimicrobial agents. many samples of significant metals are silver,…
Q: The clarity of a urine sample should be determined a. After warming up the sample to 45°C b.…
A: The normal color of urine is pale to dark yellow and it is usually clear with no visible particles.…
Q: How many grams of media would be required to prepare 350 plates assuming 20 mL per plate? O 72 O 112…
A: The preparation of mentioned Escherichia coli culture media contain 36 grams per litre deionized…
Q: A new analytical method to detect pollutants (D) in water is being tested. This new method of…
A: Pollutants are harmful contaminants that get introduced into the environment. Pollutants harm living…
Q: . Explain the reason for the following rules: a. Always set the micropipette within its designated…
A: A centrifuge is used to separate different components of a solution via centrifugation force.
Q: Clinical thermometer can be sterilized by boiling. a) True b) False
A: A clinical thermometer is a device that is used to measure the human body temperature. It is made up…
Q: actors that affects the efficiency of the disinfectant
A: Disinfection is a kind of process of elimination of pathogens or microorganisms and decreasing them…
Q: I. Give one(1) alternative testing method for one (1) of the ten parameters tested in a urine…
A: Introduction A dipstick test or basic urine strip test is a standard diagnosis of various components…
Q: 3. Formation and Composition of Film from Milk a. Place 10 mL of fresh milk in an evaporating dish.…
A: Milk is defined as a fluid or liquid which is secreted by the mammary glands present in the females…
Q: 4. How can you avoid cross-contamination of samples? A. Use different sized micropipettors for…
A: Micropipette are precision instruments that are designed to accurately and precisely transfer…
1. Tools that do not need to be brought when sampling is…
a. thermometer
b. Hygrometer
c. PH meter
d. DO meter
2. In the deposition method, one of the conditions that must be met is…
a. The precipitate has a high solubility or solubility product
b. The precipitate formed must be quite difficult to dissolve
c. The precipitate formed does not have to be quite pure
d. Free precipitate form
Step by step
Solved in 2 steps
- What is the best method to filter the precipitate from it's reaction mixture? a Gravity filtering is accomplished by folding the filter paper into a cone and placing it in a long stem funnel. b Vacuum filtering using a Buchner funnel with filter paper. c Using a filtering crucible that can be dried and ignited at red heat. d All of the above, just depends on the precipitate.Design a serial dilution of a sample to achieve a A) Final dilution of 10-4 using 9.0 mL blanks B) Final dilution of 10-6 using 99 mL blanks C) Final dilution of 10-6 using 9.0 mL blanksClinical thermometer can be sterilized by boiling. a) True b) False
- In sterilization, which among the supplies, instruments, glassware, etc. under the list of materials can be sterilized using either or both equipment below? List them down under the category: a) For “autoclaving” only, B) For Dry heat oven sterilization ,And C) Can be sterilized with either. Materials: 200-ml Erlenmeyer flask Stove 500-ml Erlenmeyer flask Autoclave 10-mL graduated cylinder Analytical balance 100-ml graduated cylinder pH meter Spatula Stirring rod 100-mL beaker Test tubes Distilled water Petri dish Stirring rod Alcohol lamp Glass dropper1. List the glassware/s and equipment you needed to measure 3.0915 grams of ZnCl 2 and dissolve it at exactly 50.00 mL using water as the solvent 2.List the glassware/s and equipment you needed in this procedure:Exactly 3.00 mL of Liquid A and Liquid B must be mixed and heated evenly1. What would be the effect of the following errors in chromatographic work? a. The solvent level in the developing chamber is higher than the spotted sample. b. Too much sample is applied to the paper. c. The paper is allowed to remain in the chamber after the solvent front has reached the top of the plate.
- 11. ● Possible methods for the quantitative determination of sodium bicarbonate for injection are: A) Acidimetry B) Alkalimetry C) Complexometry D) Iodometry E) Refractometry ● Calcium chloride is available in dosage forms: A) Powder for preparation of injections B) Solution for injection 10% in ampoules C) Tablets of 0.3 g D) Solution for injection 25% in ampoules E) Dry dosed powderWhich of the following is FALSE about the Nitrate Reductaion Test, procedure and interpretation? Question 2 options: A Nitrate medium contains 0.1% potassium nitrate as a substrate B Reagent A and B are used to determine the presence of nitrite C When zinc is added, it will react with any nitrate and turn red D A tube with red after zinc is a positive test for nitrate reduction E A tube that turns red after reagent A and B is a positive testTo achieve a hundred fold dilution you would add _____ microliters of sample to the appropriate amount of broth for a final volume of 1 mL.
- When a SBIA021 student measured the pH of 1.0M HCI, the student obtained a pH meter and failed to neither check the condition nor the manner of usage of the instrument. The pH meter reading timed out (Did not give a reading) Which of the following problem explanations is most correct? A)The sample in the glass beaker was being swirled vigourously while the electrode was submerged in it for a reading. B)The electrode got submerged much deeper into the solution than it should have. C)All of the above are correct problem explanations O D)The electrode had long direct contact with the environment and the glass membrane got dry.Prepare 50 plates of Sheep's Blood Agar using 100mm petri dish. Add 10% of blood to the media. (Manufacturer's instructions: Suspend 38 g of blood agar base dehydrated powder in 1 liter of distilled or deionized water.) Pour 25 mL of prepared medium per plate. Express answer to the nearest whole number. How many grams of the dehydrated powder should be weighed? Answer: What is the volume of distilled water that should be used in the preparation? Answer: What is the volume of sheep's blood that should be added to the sterilized and cooled blood agar base? Answer:Can you explain on your own words why the thermometer should not be shaken rigorously to lower the reading to zero before using it?
