Exam Details
| Subject | Laboratory Techniques in Chemistry | |
| Paper | ||
| Exam / Course | Certificate Programme in Laboratory Techniques | |
| Department | School of Sciences (SOS) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
1. Fill in the blanks with appropriate words chosen from those given in the brackets alongside for the following. Answer any ten.
Camphor is a (sublimate, nitrate)
Starch forms a with water. (solution, suspension)
Washing soda is sodium (bicarbonate, carbonate)
H2S gas is prepared in apparatus. Thiele's)
Etheris than water. (heavier, lighter)
Impurities will the boiling point of a liquid. (increase, decrease)
Soda glass is in colour. (green, blue)
Bromine is a coloured gas. (violet, brown)
Vinegar is a dilute solution of (acetic acid, formic:; acid)
In TLC, is used as an adsorbent. (silica gel, polyacrylamide)
Sodium metal is kept in (kerosene, alcohol)
Potash alum is a salt. (double, complex)
Borosilicate glass is for strong heating. (suitable, unsuitable)
2. Draw a labelled diagram of anyone of the following:
A distillation assembly used for distilling a liquid with boiling point above 180°C.
A set-up depicting column chromatography.
3. Answer any five of the following:
Name the two types of forced air burners.
Discuss briefly the procedure of recrystallization.
What is EDTA and where is it used
Calculate the Rf value for a solute which has travelled 8 cm and the solvent front is 12 cm.
Calculate the molarity of a solution which contains 6.00 g NaC1 58.44) in 200 cm^3 solution.
How will you prepare 120 cm3 1 M HC1 from given 12 M HCl
4. Write short notes on any two of the following:
Melting point determination
Thin layer chromatography
The chemical nature of water
Types of heating devices in a lab
5. Answer any four of the following questions:
Draw the sketches (any
A Buchner funnel
A burette
A volumetric standard flask
A liquid decomposes at its boiling point. Suggest a method to distil it without decomposition.
Name any two chemicals which are kept in dark bottles and explain why.
How will you prepare the following reagents in the lab:
Aqua regia
Lime water
Discuss azeotropic mixtures giving an example.
Camphor is a (sublimate, nitrate)
Starch forms a with water. (solution, suspension)
Washing soda is sodium (bicarbonate, carbonate)
H2S gas is prepared in apparatus. Thiele's)
Etheris than water. (heavier, lighter)
Impurities will the boiling point of a liquid. (increase, decrease)
Soda glass is in colour. (green, blue)
Bromine is a coloured gas. (violet, brown)
Vinegar is a dilute solution of (acetic acid, formic:; acid)
In TLC, is used as an adsorbent. (silica gel, polyacrylamide)
Sodium metal is kept in (kerosene, alcohol)
Potash alum is a salt. (double, complex)
Borosilicate glass is for strong heating. (suitable, unsuitable)
2. Draw a labelled diagram of anyone of the following:
A distillation assembly used for distilling a liquid with boiling point above 180°C.
A set-up depicting column chromatography.
3. Answer any five of the following:
Name the two types of forced air burners.
Discuss briefly the procedure of recrystallization.
What is EDTA and where is it used
Calculate the Rf value for a solute which has travelled 8 cm and the solvent front is 12 cm.
Calculate the molarity of a solution which contains 6.00 g NaC1 58.44) in 200 cm^3 solution.
How will you prepare 120 cm3 1 M HC1 from given 12 M HCl
4. Write short notes on any two of the following:
Melting point determination
Thin layer chromatography
The chemical nature of water
Types of heating devices in a lab
5. Answer any four of the following questions:
Draw the sketches (any
A Buchner funnel
A burette
A volumetric standard flask
A liquid decomposes at its boiling point. Suggest a method to distil it without decomposition.
Name any two chemicals which are kept in dark bottles and explain why.
How will you prepare the following reagents in the lab:
Aqua regia
Lime water
Discuss azeotropic mixtures giving an example.
Other Question Papers
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Subjects
- Good Laboratory Practices
- Laboratory Techniques in Biology
- Laboratory Techniques in Chemistry
- Laboratory Techniques in Physics