COMPLETE ANSWER TO CHM192: Introductory Chemistry Practical Ii TMA4

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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

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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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