Today am going to share answer to chemistry practical TMA 4 with you guys so let get started;
Question 1 : If a procedure says weigh accurately about 0.8g, which of these balance will you use?
answer Analytical
Question 2 : Deliquiscent samples should be stored in the _________.
answer
Dessicator
Question 3 : Fractional distillation is used to purify material containing only small amounts of impurities with much higher or lower boiling
answer
That’s true
Question 4 : Which of the heating methods will a boiling flask and condenser attached together?
answer
Steam bath
Question 5 : Most samples are hygroscopic,therefore needs to be protected with a________.
answer
Dessicator
Question 6 : I.Electric II. Mechanical III. Hot plate. Which of this/these stirrer is magnetic?
answer
III only
Question 7 : Which of these stirrers allows stirring to done at constant temperature?
answer
Hot plate
Question 8 : I. Voltage II. Temperature III. Air current IV. Level of vibration. Which of these can affect the weighing balance?
answer
I,II,III,IV
Question 9 : When a reaction is said to be thermally ________ , then _______ is necessary .
answer
labile/cooling
Question 10 : What is the colour change of a Drierite when it becomes ineffective?
answer
Blue to Pink
Question 11 : The viscosity of all liquids varies inversely with temperature.
answer
Correct
Question 12 : What effect does applied force have on viscosity of water?
answer
Remains the same
Question 13 : Soaps,tars, vegetable oils,glue and gels are all examples of ________ liquids.
answer Thixotropic
Question 14 : Safety flame is also as __________ flame in Bunsen burner.
answer Yellow
Question 15 : In which of these liquids is the applied force directly related to viscosity?
answer Dilatant
Question 16 : One of these sources of error cannot easily be detected in the concluding analytical figures.
answer
Weighing
Question 17 : Which of the seperation technique employs the combination of air and gravity pressure?
Filtration
Question 18 : If a substance has finite boiling point, it can be concluded that it (is)
answer
pure
Question 19 : What is/are the factors considered in selecting a heating method?
answer Reaction condition,chemicals and physical material properties
Question 20 : In the laboratory,which of the following scale is employed in measuring mass more accurately?
answer
Digital weighing
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