TMA3 CHM391 PRACTICAL CHEMISTRY V- INORGANIC AND ANALYTICAL

TMA3 CHM391 PRACTICAL CHEMISTRY V- INORGANIC AND ANALYTICAL

  1. ____ helps to remove impurity from a precipitate
  2. Re-precipitation
  3. Occlusion
  4. Co-precipitation
  5. Digestion

The answer is A. Re-precipitation

  1. _____ is the second step involved in gravimetric analysis
  2. Digestion
  3. Precipitation
  4. Washing
  5. Filtration

The answer is B. Precipitation

  1. Calculate the mineral acidity of 100ml of a water sample titrated with 0.2m of 0.80mg/l of NaOH
  2. 4mg/l
  3. 16mg/l
  4. 20mg/l
  5. 8mg/l

The answer is B. 16mg/l

  1. Which of the following analytical techniques is used for the separation of the weight of element in a given sample?
  2. Precipitation gravimetry
  3. Atomic absorption spectroscopy
  4. Qualitative and quantitative analysis of cation
  5. Colorimetry

The answer is A. Precipitation gravimetry

  1. All of the following are experimental preliminaries involved in determination of the concentration of elements by AAS, except___
  2. Precipitation of standard solution of the element
  3. Precipitation of sample solution
  4. Sourcing of sample
  5. Preparation of calibration curve

The answer is C. Sourcing of sample

  1. Due to corrosive nature of _____ make it an important parameter to determine in water analysis
  2. Hard water
  3. Water containing nitrate
  4. Acidified water
  5. Water containing nitrate

The answer is C. Acidified water

  1. ____ is used particularly for determining the concentration of metal ion in solution?
  2. UV-Visible spectroscopy
  3. Infrared spectroscopy
  4. Colorimetry
  5. Atomic absorption spectroscopy

The answer is D. Atomic absorption spectroscopy

  1. It is important to determine and control alkalinity in water because _____?
  2. It causes cancer
  3. Alkaline water corrode pipes and boilers
  4. It forms precipitate which foul pipes
  5. It causes tooth decay

The answer is C. It forms precipitate which foul pipes

  1. _____ is used for the precipitation of calibration graph in spectroscopic method of analysis
  2. Standard solution of the compound being determined
  3. Colourless solution of the compound being determined
  4. Concentration solution of the compound being determined
  5. Coloured solution of the compound being determined
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The answer is A. Standard solution of the compound being determined

  1. The reagent added to an analyte in solution which then forms an insoluble precipitation is known as _____?
  2. Titrant
  3. Supernatant
  4. Titrant
  5. Precipitant

The answer is D. Precipitant

 

 

 

 

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