[OBJECTIVE]
Subject: Analytical Chemistry
Time Allowed: 15 Minutes
Maximum Marks: 10
NOTE: Attempt this Paper on this Question Sheet only. Please encircle the correct option. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.
Part-I Encircle the right answer, cutting and overwriting is not allowed. (10)
1. _________ test is also known as Dixon’s test.
a) F-test
(b) t-test
(c) Q-test
(d) X-test
2. Components which have small value of K have affinity for
(a) mobile phase
(b) stationary phase
(c) no phase
(d) solution
3. Number of significant figures in 800.0 is ________.
(a) one
(b) two
(c) four
(d) six
4. The identification of elements, species and/or compounds present in a sample is known as ________.
(a) Quantitative analysis
(b) Qualitative analysis
(c) Structural analysis
(d) Both a & b
5. The rounding off form of 9.47 is ________.
(a) 9.4
(b) 9.5
(c) 9.47
(d) All
6. Aqueous slurry of adsorbent powder is mixed ________ with binder to help it to adhere the plate in TLC. (
(a) Plaster of Paris
(b) Gypsum
(c) Polyvinyl alcohol
(d) All
7. The cellulose filter paper used in paper chromatography is ______.
a) Hydrophobic
(b) colored
(c) hydrophilic
(d) none of the above
8. The range of vacuum ultraviolet region is ________.
(a) 800 – 400nm
(b) 490 -200nm
(c) 200 – 50 nm
(d) None
9. log(ln/1)= ECl where E is called as
a) Molar extinction coefficient
(b) Molar absorption coefficient
c) Molar absorptivity
(d) All
10. Shifting of max towards the shorter wavelength is called
(a) hathochromic shill
(b) hypsochromic shift
(c) hyperchromic shift
(d) hypochromic shift
[SUBJECTIVE]
Subject: Analytical Chemistry
Time Allowed: 2 Hour and 45 Minutes
Maximum Marks: 50
NOTE: ATTEMPT THIS (SUBJECTIVE) ON THE SEPARATE ANSWER SHEET PROVIDED.
Part-II Give Short answers, Each question carries equal marks. (20)
Q#1: A concentrated solution of 37% FICI having density 1.19g/ml is provided. What is the molarity of HCI?
Q#2: What is the difference between precision and accuracy? Give example.
Q#3: What is the main function of hinder in TLC?
Q#4: Define standard deviation? Give its formula.?
Q#5: Define confidence limit and give its formula?
Q#6: What are the advantages of double beam spectrophotometer over single beam spectrophotometer?
Q#7: Define Beer- Lambert’s law.
Q#8: What is the difference between partition and adsorption chromatography?
Q#9: Write down 2 limitations of TLC
Q#10: What is kieselguhr? Where is it used?
Part-III Give detailed answers, Each question carries equal marks. (30)
Q#1: (a) What is the difference between systematic and random errors? Explain with examples.
(b) Define student t-test? What are the applications of F-test?
Q#2: (a) Discuss the methods for the detection of colorless spots in TLC?
(b) What are the different types of adsorbents used in column chromatography?
Q#3: (a) How do electromagnetic radiations interact with matter? Explain.
(b) How does photomultiplier tube work in UV/V is spectrophotometers?
[OBJECTIVE]
Subject: Analytical Chemistry
Time Allowed: 15 Minutes
Maximum Marks: 10
NOTE: Attempt this Paper on this Question Sheet only. Please encircle the correct option. Division of marks is given in front of each question. This Paper will be collected back after expiry of time limit mentioned above.
Part-I Encircle the right answer, cutting and overwriting are not allowed. (10)
1. Which of the following is not application of flame emission photometer?
a) Analysis of biological fluid
b) Determination of sodium and potassium ions in soil analysis
c) Determination of metal
d) Analysis of complex mixture
2. Solvent extraction is controlled by
a) Distribution law
b) Dilution law
c) Particle size
d) All
3. Ether layer is used to separate
a) Fiber
b) Inorganic impurity
c) Organic impurity
d) Gases
4. Absorbed wavelength is AAS appear as
a) Dark background
b) Dark lines
c) Light background
d) None
5. In flame emission photometer, the measurement of ________ is used for qualitative analysis
a) Color
b) Intensity
c) Velocity
d) Frequency
6. Laminar flow burner, used in flame photometer is known as
a) Turbulent burner
b) Premix burner
c) Total consumption burner
d) Nozzle mix burner
7. In Gel electrophoresis, how do we make DNA migrate through the gel
a) Gravity
b) Place a positive electrode away from wells
c) Large fragments drift to end of the gel
d) Place a negative electrode away from wells
8. Ion exchange resin is
a) Linear
b) Low molecule weight
c) Organic polymer with porous structure
d) Soluble
9. Which of the following is not component of emission system in flame photometer?
a) Burner
b) Atomizer
c) Fuel gases
d) Chopper
10. The pH at which the net charge in the amino acid is zero
a) Isoelectric point
b) Isoelectric focusing
c) Capillary point
d) None
[SUBJECTIVE]
Subject: Analytical Chemistry
Time Allowed: 2 Hours 45 Minutes
Maximum Marks: 50
NOTE: ATTEMPT THIS (SUBJECTIVE) ON THE SEPARATE ANSWER SHEET PROVIDED.
Part-II Give short notes on following, each question carries equal marks. (20)
Q#1: What is isoelectric point?
Q#2: Differentiate between Flame photometry and atomic absorption spectroscopy.
Q#3: Write examples of strong acid cationic resins.
Q#4: What do you mean by percent extraction?
Q#5: Write principle of atomic absorption of spectroscopy.
Q#6: Describe significance of Gel chromatography.
Q#7: What do you know about electro osmotic flow?
Q#8: How does ion exchange chromatography help in softening of hard water?
Q#9: What is solid phase extraction?
Q#10: What is the role of complexing agents in metal extraction?
Part-III Give detailed answers, each question carries equal marks. (30)
Q#1: Explain all steps involved in flow injection analysis.
Q#2: Discuss different types of resins
Q#3: How are metals extracted by solvent extraction? Explain.
Q#4: Write applications of flame emission spectroscopy.
Q#5: Describe hydride generation in flameless method in AAS.
Q#6: Discuss factors affecting ion exchange chromatography.
