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1st Year Chemistry Short Questions (Chapter 2)

  If you are in 1st year class 


And searching for important short questions for your exams preparation than read it out 


Here is some short questions from chapter 2 of 1st year



INTRODUCTION 


1. Define analytical chemistry?


2. Differentiate qualitative and quantitative analysis?


3. What steps are involved in quantitative analysis?


4 . Mention various experimental techniques used for the purification of the substance.


FILTRATION


5.What is filtration. Which factors dictate the choice of filter media?


6.Write four precautions of filtration through filter paper (what should be the size of funnel used for filtration)?


7. How filter paper is folded?


8. how rate of filtration through conical funnel can be increased (what is fluted filter paper)?


9. What is Gooch crucible. How does it increase the rate of filtration?


10. Write advantages of Gooch crucible (Conc. HCl and KMnO cannot be filtered by paper)?


11. What is sintered glass crucible Why it is preferred over Gooch crucible? 


CRYSTALLIZATION 


12. Define crystallization & write its basic principle


13. Name the steps involved in crystallization


14. Write main features of an ideal solvent


15. Give examples of solvent used in crystallization 


16. How crystals are dried by filter paper (Wnte two methods to dry the crystals)


17.How crystals are dried in vacuum desicator. What chemicals are used as drying agents in it 


18.How undesirable colors are removed from crystals?


SUBLIMATION


19. Define sublimation and give four examples of sublime compounds


20. How mixture of NH4Cl and NaCl can be separated? (How punification is carried out by sublimation)


 SOLVENT EXTRACTION


 21. What is solvent extraction. How it is done?


22.What is ether extraction?


23. State distribution law or partition law.


24. Write experimental evidence of solvent extraction (lodine is more soluble in water in the presence of Kl Discuss)  


CHROMATOGRAPHY 


25.Define chromatography Write its meaning


26 Differentiate b/w stationary and mobile phase.


27. What is distribution coefficient? 


28. Differentiate adsorption and partition chromatography. 


29. Define retardation factor (Rf). Why it has no unit.


30 Write uses of chromatography ?




REGARDS : TALHA 

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