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, 2016 | |
| City, State | new delhi, |
Question Paper
1. Fill in the blanks with appropriate words chosen from those given in the brackets alongside. Answer any ten parts.
is a metal slab with an electric heating coil in it. (Hot plate, Heating mantle)
A volumetric flask is used to prepare a definite of a solution of precisely known concentration. (mass, volume)
Traces of grease or oil may be removed by rinsing with small amount of (acetone, hydrochloric acid)
indicators have to be added into the reaction solution. (Internal, Self)
Chromatography is essentially a technique. (separation, distillation)
The conductance is defined as the reciprocal of resistance)
The pH of an acidic solution is 7. (less than, more than)
The technique which determines the mass of precipitate produced in a particular chemical reaction is known as (gravimetric analysis, volumetric analysis)
The boiling point of a liquid at a pressure of 760 mm of mercury is called (normal boiling point, standard boiling point)
Two liquids are called completely when they mix completely with each other in all proportions. (miscible, immiscible)
Scales from still water may be removed with (hydrochloric acid, citric acid)
The fixed medium ill chromatograph is ca1led (mobile phase, stationary phase)
Natural gas and LP gas have calorific values. (high, low)
The dissolved substance in a solution is known as (solute, solvent)
2. Attempt any five of the following questions:
Write any two characteristics of a primary standard.
What precautions should be taken while preparing dilute sulphuric acid solution from concentrated sulphuric acid?
Describe briefly how tap water is deionized.
What is the use of desiccators? Name any one commonly used desiccant.
Draw a conductometric titration curve for strong acid -strong base titration.
Calculate the amount of CuSO4. 5H20 required 249·5 g to prepare 500 ml of 1 M standard solution.
What is recrystallisation
3. Answer any five of the following questions:
What are the applications of TLC
Name two methods of estimating hardness of water.
Give examples of pairs of liquids which are
completely miscible and
partially miscible.
What is a colloidal solution Give one example.
Describe briefly the storage techniques for the storage of glass apparatus.
Briefly describe the importance of annealing in glass working.
What do you mean by bench reagents? Give any two examples.
Draw a labelled diagram of a semi-micro technique for boiling point determination.
OR
Draw a labelled diagram of a Boiling Tube Assembly for melting point determination.
Discuss the use of mixed melting point method.
OR
What are the factors influencing the Rf
values in chromatography?
5. Answer any five of the following questions:
What is the use of water bath in the laboratory
What is an ashless filter paper?
Write the principle of paper chromatography.
What is deionized water? How is its purity determined
What is the pH of a solution having hydrogen ion concentration of mol
Define the temporary hardness of water.
What is molarity?
is a metal slab with an electric heating coil in it. (Hot plate, Heating mantle)
A volumetric flask is used to prepare a definite of a solution of precisely known concentration. (mass, volume)
Traces of grease or oil may be removed by rinsing with small amount of (acetone, hydrochloric acid)
indicators have to be added into the reaction solution. (Internal, Self)
Chromatography is essentially a technique. (separation, distillation)
The conductance is defined as the reciprocal of resistance)
The pH of an acidic solution is 7. (less than, more than)
The technique which determines the mass of precipitate produced in a particular chemical reaction is known as (gravimetric analysis, volumetric analysis)
The boiling point of a liquid at a pressure of 760 mm of mercury is called (normal boiling point, standard boiling point)
Two liquids are called completely when they mix completely with each other in all proportions. (miscible, immiscible)
Scales from still water may be removed with (hydrochloric acid, citric acid)
The fixed medium ill chromatograph is ca1led (mobile phase, stationary phase)
Natural gas and LP gas have calorific values. (high, low)
The dissolved substance in a solution is known as (solute, solvent)
2. Attempt any five of the following questions:
Write any two characteristics of a primary standard.
What precautions should be taken while preparing dilute sulphuric acid solution from concentrated sulphuric acid?
Describe briefly how tap water is deionized.
What is the use of desiccators? Name any one commonly used desiccant.
Draw a conductometric titration curve for strong acid -strong base titration.
Calculate the amount of CuSO4. 5H20 required 249·5 g to prepare 500 ml of 1 M standard solution.
What is recrystallisation
3. Answer any five of the following questions:
What are the applications of TLC
Name two methods of estimating hardness of water.
Give examples of pairs of liquids which are
completely miscible and
partially miscible.
What is a colloidal solution Give one example.
Describe briefly the storage techniques for the storage of glass apparatus.
Briefly describe the importance of annealing in glass working.
What do you mean by bench reagents? Give any two examples.
Draw a labelled diagram of a semi-micro technique for boiling point determination.
OR
Draw a labelled diagram of a Boiling Tube Assembly for melting point determination.
Discuss the use of mixed melting point method.
OR
What are the factors influencing the Rf
values in chromatography?
5. Answer any five of the following questions:
What is the use of water bath in the laboratory
What is an ashless filter paper?
Write the principle of paper chromatography.
What is deionized water? How is its purity determined
What is the pH of a solution having hydrogen ion concentration of mol
Define the temporary hardness of water.
What is molarity?
Other Question Papers
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Subjects
- Good Laboratory Practices
- Laboratory Techniques in Biology
- Laboratory Techniques in Chemistry
- Laboratory Techniques in Physics