Exam Details
| Subject | Basic Analytical chemistry | |
| Paper | ||
| Exam / Course | Post Graduate Diploma in Analytical Chemistry | |
| Department | School of Sciences (SOS) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 4 IMCH-0011
P.G. DIPLOMA IN ANALYTICAL CHEMISTRY
(PGDAC)
Term-End Examination
December, 2016 00674
MCH-OO1 BASIC ANALYTICALCHEMISTRY
Time hours Maximum Marks: 75
Note: Answer any five questions. All questions carry equal marks.
1. Name the commonly used thermal methods of analysis. In which of these do we note the rate of change of weight as a function of temperature? 5
The observed and true values of an analyte are 5.25 g and 5.30 respectively. Find the relative error in parts per thousand. 5
What are the different ways by which humans are directly exposed to chemicals? 5
2. A set of replicate measurements of an analyte are 0.792 0.794 0.813 g and 0.900 g. Calculate the mean, median and range. 5
Is chromatography a single stage or a multistage process Name three types of chromatography. 5
Give one example each of the following: 5
Poisonous gas
Carcinogen
Flammable solid
Flammable liquid
Corrosive substance
3. Write the rate equation in differential form and integrated form for a first order reaction involving a single reactant. What will be the unit of rate constant for a first order reaction 5
Define a Lewis acid and a Lewis base and give one example of each. 3
Identify the base on the left and the conjugate acid on the right in the following: 2
CH3COOH H2O CH3COO^-
NH3 CH3OH CH3O^-
Name one analytical technique based on each of the following: 5
Emission of radiation
Measurement of mass of substance deposited on electrode
Absorption of radiation
Measurement of change in conductivity
Scattering of radiation
4. Draw and explain the titration curve you will obtain when Na2C03 is titrated with HCl. What indicator/indicators will you use and why? 5
Mention any three requirements of primary standards. Which of these are primary standards oxalic acid, potassium permanganate, sodium carbonate, sodium hydroxide? 5
Iodine can be used for estimation of both oxidising and reducing agents. Illustrate with examples. What indicator is used in a titration involving iodine? 5
5. Calculate the electrode potential of a half cell containing aqueous solution of 0.100 M KMn04 and 0.100 M MnCl2 at pH 1.00.
Given E^O MnO4^-I 1.52 V 5
What is the difference between accuracy and precision Explain with help of suitable examples. 5
What are buffers? What are the effects of
addition of acids and bases, and
dilution on pH of a buffer? 5
6. Define masking. You are provided with a solution containing and Mg^2+. Explain how you will estimate both the metals using EDTA as the titrant by using appropriate masking and demasking agents.
What is coprecipitation? How can it be minimized? 5
Derive the integrated rate equation for a first order reaction A P. What are the units of its rate constant? 5
7. Give the ionic reaction for the titration between potassium permanganate and oxalic acid in acidic medium. Why is heating needed in this titration Which indicator will you use? Can you use HCl for acidification Give reason. 5
Give one example of a metallochromic indicator. Give any two requirements that a substance should possess to be used for. this purpose. 5
What is meant by amphiprotic and aprotic solvents? Give one example of each. 5
8. Write short notes on any three of the following: 3x5=15
Precipitation titration using Fajans' method
Determinate errors and their sources
Precipitation from homogenous solutions
Storage of chemicals
Physical and chemical adsorption
P.G. DIPLOMA IN ANALYTICAL CHEMISTRY
(PGDAC)
Term-End Examination
December, 2016 00674
MCH-OO1 BASIC ANALYTICALCHEMISTRY
Time hours Maximum Marks: 75
Note: Answer any five questions. All questions carry equal marks.
1. Name the commonly used thermal methods of analysis. In which of these do we note the rate of change of weight as a function of temperature? 5
The observed and true values of an analyte are 5.25 g and 5.30 respectively. Find the relative error in parts per thousand. 5
What are the different ways by which humans are directly exposed to chemicals? 5
2. A set of replicate measurements of an analyte are 0.792 0.794 0.813 g and 0.900 g. Calculate the mean, median and range. 5
Is chromatography a single stage or a multistage process Name three types of chromatography. 5
Give one example each of the following: 5
Poisonous gas
Carcinogen
Flammable solid
Flammable liquid
Corrosive substance
3. Write the rate equation in differential form and integrated form for a first order reaction involving a single reactant. What will be the unit of rate constant for a first order reaction 5
Define a Lewis acid and a Lewis base and give one example of each. 3
Identify the base on the left and the conjugate acid on the right in the following: 2
CH3COOH H2O CH3COO^-
NH3 CH3OH CH3O^-
Name one analytical technique based on each of the following: 5
Emission of radiation
Measurement of mass of substance deposited on electrode
Absorption of radiation
Measurement of change in conductivity
Scattering of radiation
4. Draw and explain the titration curve you will obtain when Na2C03 is titrated with HCl. What indicator/indicators will you use and why? 5
Mention any three requirements of primary standards. Which of these are primary standards oxalic acid, potassium permanganate, sodium carbonate, sodium hydroxide? 5
Iodine can be used for estimation of both oxidising and reducing agents. Illustrate with examples. What indicator is used in a titration involving iodine? 5
5. Calculate the electrode potential of a half cell containing aqueous solution of 0.100 M KMn04 and 0.100 M MnCl2 at pH 1.00.
Given E^O MnO4^-I 1.52 V 5
What is the difference between accuracy and precision Explain with help of suitable examples. 5
What are buffers? What are the effects of
addition of acids and bases, and
dilution on pH of a buffer? 5
6. Define masking. You are provided with a solution containing and Mg^2+. Explain how you will estimate both the metals using EDTA as the titrant by using appropriate masking and demasking agents.
What is coprecipitation? How can it be minimized? 5
Derive the integrated rate equation for a first order reaction A P. What are the units of its rate constant? 5
7. Give the ionic reaction for the titration between potassium permanganate and oxalic acid in acidic medium. Why is heating needed in this titration Which indicator will you use? Can you use HCl for acidification Give reason. 5
Give one example of a metallochromic indicator. Give any two requirements that a substance should possess to be used for. this purpose. 5
What is meant by amphiprotic and aprotic solvents? Give one example of each. 5
8. Write short notes on any three of the following: 3x5=15
Precipitation titration using Fajans' method
Determinate errors and their sources
Precipitation from homogenous solutions
Storage of chemicals
Physical and chemical adsorption
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Basic Analytical chemistry
- Electro analytical and Other methods
- Separation methods
- Spectroscopic methods