prac probs

• fungus


  Ringworm is a disease caused by

  a Bacteria

  B. Fungus

  C. Tape worm

  D. Roundworm
• C. Candida albicans


  Which of the following is an opportunistic pathogen that can cause disease in immunocompromised patients?

  A Trichomonas vaginalis

  B. Neisseria gonorrhea

  C. Candida albicans

  D. Herpes simplex virus
• B. Ultimate analysis


  Assay of atropine in Belladona is an example of

  a Proximate analysis

  B. Ultimate analysis
• Volumetric solutions


  Standard solutions are also known as
• An organic compound that changes from one color to another at a certain pH is called:

  Indicator
• Endpoint that is shown by a change in color of the solution being titrated

  Practical endpoint
• Components of a blank used in the assay of a substance include the following except

  a Solvent C. Indicator B. Reagent D. Analyte
• In titrimetry, a glass stopcock is usually used and preferred when the primary standard is a/an


  Acid
• What is the method of analysis in the assay of aspirin capsules?

  Residual alkalimetry
• The following are indicators used for acid-base titrations, except


  Ferric alum
• The indicator used in the assay of weak acid reacting with a strong base


  Phenolphthalein
• The gram molecular weight of sulfuric acid is 98. A 49g/L solution is


  0.5M
• If 1 mL of HCl is equivalent to 1.5 mL of 0.5N NaOH, then the volume of the alkali that would be consumed by 30 mL of acid is:


  45 mL
• The formula weight of NaOH is 40. How many grams of NaOH pellets are needed to make 500mL of 1.5N solution?


  30
• In the assay of ZnO (MW = 81.38), each mL of 1N of H2SO4 is equivalent to _ of ZnO


  40.69mg
• Calculate the MgO (40g/mol) content of milk of magnesia, 12.32g of which was dissolved in 50mL of 1.034N sulfuric acid producing a mixture that required 24.6 mL of 1.1255N sodium hydroxide


  3.90%
• Precipitation method using K chromate TS as indicator and Ag nitrate as standard solution


  Mohr
• A change in the valence of reacting substances is seen in which type of analysis?


  Reduction/Oxidation
• lodometry indirectly assesses

  Oxidizing agents
• A process wherein the sample is made to liberate iodine, which is then titrated with a standard solution of sodium thiosulfate:


  Iodometry
• A sample of 0.1350g of As203 was assayed iodimetrically using 23.4ml of 0.1055N lodine solution. (As = 74.92) The percentage purity of the sample is:

  90.45
• Permanganate titration necessitates the use of which acid?


  Sulfuric acid
• In the assay of sulfonamides, the method used is


  Diazotization
• The assay of Menadione sodium uses this method of analysis


  Redox method
• The type of ligand where EDTA belongs


  Hexadentate
• The primary standard used to standardize Karl-Fischer reagent


  Na tartrate
• The indicator used for the titration of calcium using EDTA

  Hydroxynaphthol blue
• A term in complexometry that pertains to the determination of a metal in the presence of another metal


  Masking
• Inactivates Hg and Cu, to allow titration of Zn at pH 6


  Thioglycol
• The specific method for water content determination official in the USP/NF, except WA


  Dew Point Process
• In azeotropic method for water analysis, the solvent that canbe used is


  Toluene and Benzene
• A polarimeter is used to determine whether a substance is

  • Dextrorotatory
  • Optically Active
  • Levorotatory
  • All of the above
• Substances that have the power of rotating the plane polarized light are said to be


  Optically active
• This refers to the functional group which absorbs the radiant energy


  Chromophore
• number cycles per time

  Frequency
• length of wave or cycle “peak to peak”


  Wavelength
• reciprocal of wavelength

  Wave number
• The unit of wavelength in spectrometry, except


  Millimeter
• Beer's plot in spectrometry is prepared to determine:


  Concentration of the sample
• A solution with a concentration of 0.14M is measured to have an absorbance of 0.43. Another solution of the same chemical is measured under the same conditions and has an absorbance of 0.37. What is its concentration?

  0.12 M