Q8 of 26 Page 1

Name the reagents used in the following reactions:

(i)


(ii)



(i)


When acetaldehyde reacts with Grignard reagent a secondary alchol called prop-2-ol(isopropyl alcohol) is formed.


(ii)


Explanation:


Phosphorus trichloride (PCl3), Phosphorus pentachloride (PCl5)& Thionyl chloride (SOCl2) are powerful chlorinating agents. –OH group is easily replaced with Cl atom.



As SO2 and HCl can be easily separated from the main product, thionyl chloride is preferred often.


More from this chapter

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6

(i) Write down the IUPAC name of the following complex:

[Cr(en)3]Cl3


(ii) Write the formula for the following complex:


Potassium tri oxalato chromate(III)


 7

What is meant by negative deviation from Raoult’s law? Give an example. What is the sign of ΔmixH for negative deviation?

OR


Define azeotropes. What type of azeotrope is formed by negative deviation from Raoult’s law? Give example.


 9

(a) Following reactions occur at cathode during the electrolysis of aqueous copper(II) chloride solution:


On the basis of their standard reduction electrode potential (E0) values, which reaction is feasible at the cathode and why?


(b) State Kohlrausch law of independent migration of ion. Write its one application.


 10

Why do transition elements show variable oxidation states? In 3d series (Sc to Zn), which element shows the maximum number of oxidation states and why?