Analytical Chemistry - Chemistry II - Chapter 7 - For Class X (2022 and Onward) - SECTION "A" - Multiple Choice Questions, Fill in the blanks

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Chapter No.7: Analytical
For Class X (Science Group)

SECTION A - Multiple Choice QuestionsS (MCQs)

Encircle the correct answer from the following:
1. The Analytical Chemistry deals with instruments and methods to ______, identify and quantify the matter.
a) Mix
b) Separate ✓
c) Differentiate
d) Manipulate

2. The sample may be solid, liquid, gas or a _____ in qualitative analysis.
a) Mixture ✓
b) Compound
c) Substance
d) None of these

3. Analysis deals with the identification of the presence of functional groups in compounds is:
a) Physical qualitative analysis ✓
b) Analytical qualitative analysis
c) Organic qualitative analysis ✓
d) Inorganic qualitative analysis

4. Flame test of copper halide with bluish-green colour identity the presence of:
a) Halogen
b) Hydrogen
c) Copper ✓
d) 'b' and 'c'

5. The physical methods used to measure physical properties are called:
a) Combustion analysis method
b) Atomic emission spectroscopy method ✓
c) Volumetric analysis method
d) Gravimetric analysis method

6. The error caused by improper functioning of an instrument is:
a) Determinant error
b) Indeterminant error
c) Systematic error
d) Both 'a' & 'c' ✓

7. An agreement between a measured value and the accepted true value.
a) Error
b) Accuracy ✓
c) Precision
d) All of these

8. Spectroscopy is the interaction of light with:
a) Liquid
b) Solid
c) Gas
d) Matter ✓

9. The Gas is a mobile phase in:
a) Light chromatography
b) Solid chromatography
c) Gas chromatography ✓
d) None of these

10. It is used to assess the concentration or amount of a given atomic, molecular or ionic chemical.
a) Chromatography
b) Spectroscopy ✓
c) Conductometry
d) Potentiometry

More Multiple Choice QuestionsS (MCQs)

11. The analytical chemistry consists of ____ main types of analysis.
a) Two ✓
b) Three
c) Four
d) Five

12. The identification of elements, ions or compounds present in a sample is called:
a) Quantitative analysis
b) Qualitative analysis ✓
c) Physical analysis
d) Organic analysis

13. Formation of the white precipitate by adding silver nitrate (AgNO₃) in dilute nitric acid (HNO,₃) indicates the presence of:
a) Halide ✓
b) Hydrogen
c) Copper
d) 'b' and 'c'

14. It deals with the identification of elements.
a) Chemical quantitative analysis
b) Organic qualitative analysis
c) Physical qualitative analysis
d) Inorganic qualitative analysis ✓

15. The determination of how much amount or quantity of one or more substances present in a compound or sample is called:
a) Quantitative analysis ✓
b) Qualitative analysis
c) Physical analysis
d) Organic analysis

16. Chemical reactions such as precipitation, oxidation or neutralization are measured by: (i) volumetric analysis, (ii) gravimetric analysis, (iii) combustion analysis
a) only (i)
b) only (ii)
(c) (ii) & (iii)
(d) All of them ✓

17. It is a measurable factor or boundary which define the performance and quality of analytical methods.
a) Quality
b) Quantity
c) Parameter ✓
d) All of these

18. Various parameters of validation of any analytical method are: (i) selectivity & linearity, (ii) range & accuracy (iii) precision & error
a) (i) & (ii)
b) (i) & (iii)
c) (ii) & (iii)
d) All of them ✓

19. In acid—base titration if burette is not properly cleaned or rinsed will cause:
a) random error
b) systematic error ✓
c) Both 'a' & 'b'
d) None of them

20. An indeterminate error caused by variations of the procedure, environmental factors and limitations of instrumentation.
a) Random error ✓
b) Systematic error
c) Both 'a' & 'b'
d) None of them

21. It is not dependent on precisions.
a) Error
b) Accuracy ✓
c) Both 'a' & 'b'
d) None of them

22. The degree of agreement between replicate measurements of the same quantity.
a) Error
b) Accuracy
c) Precision ✓
d) All of these

23. It is the repeatability of a result and is known as the degree of exactness.
a) Precision ✓
b) Error
c) Accuracy
d) Parameter

24. Interaction of matter with radiative energy as a function of wavelength or frequency is called:
a) HPLC
b) Chromatography
c) Conductometry
d) Spectroscopy ✓

25. They are also known as electronic spectroscopy: (i) Ultraviolet spectroscopy, (ii) Infrared spectroscopy, (iii) Visible spectroscopy
a) (i) & (ii)
b) (i) & (Iii) ✓
c) (ii) & (iii)
d) All of them

26. The wavelength range of ultraviolet and visible spectroscopy is:
a) 52 to 700 nm
b) 92 to 80 0nm
c) 192 to 900 nm ✓
d) 212 to 880 nm

27. Infrared spectroscopy is an analytical technique introduced in:
a) 1950 ✓
b) 1960
c) 1970
d) 1976

28. It is used for specification of functional groups in food products, polymers and industries.
a) Ultraviolet spectroscopy
b) Visible spectroscopy
c) Infrared spectroscopy ✓
d) Liquid chromatography

29. It is an effective tool for quality control in different industries.
a) Visible spectroscopy
b) Infrared spectroscopy ✓
c) Liquid chromatography
d) Gas chromatography

30. Electromagnetic radiations lower in energy than visible radiations are called:
a) Infra-red radiation ✓
b) Ultraviolet radiation
c) Visible radiation
d) None of them

31. The ordinary IR region extends from 2.5 pm (wavelength) to:
a) 7 μm
b) 10 μm
c) 12 μm
d) 15 μm ✓

32. It is also known as vibrational spectroscopy.
a) Ultraviolet spectroscopy
b) Visible spectroscopy
c) Infrared spectroscopy ✓
d) Liquid chromatography

33. It is the modern analytical technique which is used for the separation of compounds.
a) Ultraviolet spectroscopy
c) Visible spectroscopy
c) Infrared spectroscopy
d) Chromatography ✓

34. It is a technique used in analytical chemistry for the separation of volatile compounds.
a) Visible spectroscopy
b) Infrared spectroscopy
c) Liquid chromatography
d) Gas chromatography ✓

35. It is a method used in electroanalytical chemistry to find the concentration of solute in solution.
a) Spectroscopy
b) Potentiometry ✓
c) Chromatography
d) Conductometry

36. It is a method used in the analysis of pollutants in water, pharmaceutical and drugs, quality control in the food industry and clinical chemistry.
a) Spectroscopy
b) Potentiometry ✓
c) Chromatography
d) Conductometry

Fill In The Blanks

1. The analysis and separation of sample to detect and estimate its components through various techniques and instruments is known as Analytical Chemistry.
2. The analytical chemistry answer the basic questions of What, Where, How much about material.
3. The Analytical Chemistry is applied in all fields of chemistry such as Medicine, Clinical laborites, industries, Agriculture, food contamination and environmental protection.
4. The Analytical Chemistry is consisting of two types Qualitative Analysis and Quantitative Analysis.
5. Qualitative analysis is concerned with identification of elements, ions or compounds present in sample and only measure quality.
6. Qualitative analysis subdivided in two: inorganic qualitative analysis and organic qualitative analysis.
7. Quantitative analysis is concerned with the estimation of amount of a chemical substance present either alone or in a simple or complex mixture of other substances.
8. Quantitative analysis subdivided in physical quantitative analysis and chemical quantitative analysis.
9. Error is a numerical difference between observed value and true value.
10. Errors are classified as systematic and random errors.
11. The accuracy of analytical method is the closeness of obtained value to the true value of a sample.
12. Precision is defined as the degree of agreement between replicate measurements of the same quantity.
13. The classical methods posses' qualititative as well as quantitative analysis.
14. Chemical and flame tests are qualitative analysis.
15. Titrimatic and gravimetric analysis are quantitative analysis.
16. Instrumental methods includes spectroscopy ,chromatography, electrochemical methods ,ultra violet and visible spectroscopy ,infra red spectroscopy ,HPLC, gas chromatography, potentiomotric and conductometry.

Elements and Compunds With Formulas

Elements With Symbols

• Aluminium = Al
• Bromine = Br
• Chlorine = Cl
• Copper = Cu
• Flourine = F
• Gold = Au
• Iodine = I
• Zinc = Zn

Compounds With Formulas

• Barium Chloride = BaCl₂ (Light Green Flame)
• Benzene = C₆H₆
• Calcium Chloride = CaCl₂ (Orange red Flame)
• Copper Chloride = CuCl₂ (Blue / Green Flame)
• Copper Halide = CuX OR CUX₂
• Copper Sulphate = CuSO₄ (Blue / Green Flame)
• Formaldehyde = CH₂O
• Halides = X (F, Cl, Br, I)
• Hydrochloric acid = HCl
• Lithium Chloride = LiCl (Red Flame)
• Nitric Acid = HNO₃
• Potassium Chloride = KCl (Light Lilac Flame)
• Rubidium chloride = RbCl (Violet Flame)
• Silver Chloride = AgCl
• Silver Nitrate = AgNO₃
• Sodium Hydroxide = NaOH
• Sodium Chloride = NaCl (Yellow Flame)
• Strontium Chloride = SrCl₂ (Red Or Crimson Flame)
• Toluene = C₆H₅CH₃
• Water = H₂O

Xylene = C₈H₁₀ OR (CH₃)₂C₆H₄

Zinc Sulphate = ZnSO₄

Abbreviations

• AES = Atomic Emission Spectroscopy
• EDS = Energy Dispersive X-rays Spectroscopy
• FTIR = Fourier Transform Infrared Spectroscopy
• HPLC = High Performance Liquid Chromatography
• IR = Infrared
• pH = Potential of hydrogen

Densities Of Substances

• Density Of Aluminium = 2.7 g/ml
• Density Of Copper = 8.99 g/ml

Name Of Indicators

• Litmus
• Methyl Orange
• Phenolphthalein