Q1:
Which of the following is not an example of qualitative chemical analysis?
- A Determining the concentration of a compound in a solution
- B Identifying the cationic groups in a compound
- C Identifying the anionic groups in a compound
- D Identifying the functional group in a molecule
- E Determining the elemental composition of a molecule
Q2:
Chemical analysis can be split into two types: qualitative and quantitative. Which statement best describes the difference between them?
- A Qualitative analysis aims to identify the composition of a substance, whereas quantitative analysis aims to determine the mass, percentage composition, or concentration of a substance.
- B Qualitative analysis can be used to identify the cation in a compound, whereas quantitative analysis can be used to identify the anion in a compound.
- C Qualitative analysis is used when the sample is a solid, whereas quantitative analysis is used when the sample is an aqueous solution.
- D Qualitative analysis aims to identify the chemical properties of a substance, whereas quantitative analysis aims to identify the physical properties.
- E Qualitative analysis aims to determine the mass, percentage composition, or concentration of a substance, whereas quantitative analysis aims to identify the composition of a substance.
Q3:
Which of the following represents the importance of chemical quantitative analysis in the medical field?
- A Identifying the harmful pollutants in food
- B Estimating the percentage of effective ingredients in drugs
- C Knowing the nature of the functions of hormones and enzymes
- D Determining the functional group of the newly synthesized drugs
- E None of the above
Q4:
is the chemical analysis used to identify the constituents of a substance and whether it is pure or a mixture of several substances.
- A Purification analysis
- B Qualitative analysis
- C Functional analysis
- D Quantitative analysis
Q5:
Which of the following fields is important in determining the harmony of ores and other products with and their conformity to standard specifications?
- A The industrial field
- B The agricultural field
- C The environmental field
- D The medical field
- E None of the above
Q6:
Which of the following terms best describes the identification of an unknown substance and the determination of its chemical composition?
- A Chemical analysis
- B Quantitative analysis only
- C Functional analysis
- D Physical analysis
- E Qualitative analysis only
Q7:
Which of the following choices represents the types of precipitation reactions in the chemical analysis technique?
- A Flame tests and volumetric methods
- B Spot tests and gravimetric methods
- C Flame tests and gravimetric methods
- D Spot tests and volumetric methods
- E Gravimetric methods and volumetric methods
Q8:
Chemical analysis can be used to determine the amount of cholesterol present in a person. In which scientific field is this analysis important?
- A Environmental
- B Agricultural
- C Industrial
- D Food chemistry
- E Medical
Q9:
Which of the following physical properties can help in the qualitative analysis and the identification of pure substances?
- A Boiling point
- B Melting point
- C Molar mass
- D All of the above
Q10:
There are various types of volumetric analysis (titration) that depend on the type of reaction. Which of the following can describe the type of titration in which a ion of an acidic solution combines with a ion of a basic solution to form a molecule of water and salt and whose end point can be determined by a suitable indicator?
- A Oxidation–reduction titration
- B Precipitation titration
- C Hydration titration
- D Neutralisation titration
Q11:
Fill in the blank: The separation technique in the gravimetric method to calculate the mass of a substance is carried out by of chemical analysis.
- A the volumetric and precipitation methods
- B only the volumetric method
- C only the precipitation method
- D the volatilization and precipitation methods
- E only the volatilization method
Q12:
is a series of certain reactions performed to identify the main component of a substance based on the changes that occur in these reactions.
- A Volumetric analysis
- B Gravimetric analysis
- C Quantitative analysis
- D Qualitative analysis
Q13:
Which of the following can be discovered by chemical analysis in order to improve soil properties and crops?
- A Whether the soil is acidic or basic
- B The fertilisers suitable for the soil
- C The kind and percentage of elements in the soil
- D All of the answers
Q14:
There are specific types of volumetric analysis that depend on the type of reaction, such as , which are the reactions of combining ions (except and ) that produce sparingly soluble products.
- A oxidation reactions
- B precipitation reactions
- C neutralisation reactions
- D reduction reactions
Q15:
The following data shows the quantity of the main ingredients of a cola drink in a specific soft drinks company:
| Component | Mass | Concentration |
|---|---|---|
| Carbohydrates (sugars) | 44 g | |
| Fats | 4 g | |
| Caffeine | 1.5 g | |
| Sodium | 0.5 g |
The chemists at the quality control unit of the company must have performed a analysis on random samples to ensure that the concentration of the ingredients is similar to the above data.
- A quantitative
- B biological
- C qualitative
- D physical
Q16:
The following is an incomplete table. It shows the scientific observations that are made when silver nitrate is combined with different halide ions.
| Halide Ion | Fluoride | Iodide | Bromide | Chloride |
|---|---|---|---|---|
| Observation | No precipitate | Yellow precipitate | Cream precipitate |
What term should be entered into the empty cell of the observation column?
- A Orange precipitate
- B White precipitate
- C Red precipitate
- D Blue precipitate
- E Green precipitate
Q17:
The determination of the molecular formula of a hydrated salt could be achieved through .
- A gravimetric analysis using the volatilisation method
- B volumetric analysis using the precipitation method
- C gravimetric analysis using the precipitation method
- D volumetric analysis using the volatilisation method
Q18:
Chemical analysis plays an important role in the medical field in estimating the percentage of sugar, albumin, urea, and cholesterol in blood and urine, such as in a complete blood count (CBC) test and urine analysis. This makes it easier for doctors to accurately diagnose and treat different diseases. Which of the following choices shows the type (or types) of chemical analysis used in these tests to provide a detailed description of the pure constituents and their concentrations?
- A Purification analysis only
- B Qualitative and quantitative analyses
- C Quantitative analysis only
- D Qualitative analysis only
Q19:
What is the process of determining the concentration of an acidic, or basic, solution by knowing the volume that is required to neutralise another basic, or acidic, solution of known volume and concentration?
- A Titration
- B Sublimation
- C Precipitation
- D Volatilisation
Q20:
Assume that we want to estimate the concentration of a sample and the first analysis we conduct tells us that is the main component. Which of the following analyses was carried out first and which should be carried next?
- A Qualitative analysis was carried out first, and quantitative analysis (volumetric analysis) should be carried out next to estimate the concentration in the sample.
- B Quantitative analysis was carried out first, and qualitative analysis (gravimetric analysis) should be carried out next to estimate the concentration in the sample.
- C Quantitative analysis was carried out first, and qualitative analysis (volumetric analysis) should be carried out next to estimate the concentration in the sample.
- D Qualitative analysis was carried out first, and quantitative analysis (volatilization analysis) should be carried out next to estimate the concentration in the sample.
Q21:
The identification and measurement of the harmful environmental pollutants content in water and food are considered as the integration of chemical analysis and .
- A the industrial field
- B the environmental field
- C the medical field
- D the agricultural field
Q22:
Fill in the blank: Gravimetric methods play an important role in chemical analysis especially in .
- A determining the amount of analyte through qualitative analysis
- B identifying the type of metal precipitated through qualitative analysis
- C determining the amount of analyte through quantitative analysis
- D identifying the type of metal precipitated through quantitative analysis
- E determining the concentration of acid or base by qualitative analysis
Q23:
Which of the following chemical analyses can be employed to determine the concentration of a certain analyte using a certain procedure in which a digital balance is used to determine the mass of the analyte?
- A Volumetric analysis
- B Qualitative analysis
- C Gravimetric analysis
- D All of the answers are correct.
Q24:
The qualitative analysis of inorganic compounds involves the detection of ions that form the inorganic compounds, such as simple salt ions; it includes the detection of .
- A acid radicals only
- B acid radicals and basic radicals
- C basic radicals only
- D free radicals
Q25:
Which of the following procedures can be employed for the determination of the percentage of the water of crystallisation?
- A Titration
- B Volatilisation gravimetry
- C Precipitation gravimetry
- D All of the answers are correct.
