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The elements of 3d transition series are given below : Sc Ti V Cr Mn Fe Co Ni Cu Zn Answer the following questions :
Define transition elements. Write two characteristics of transition elements.
Which of the following has the highest melting point ?
Arrange the following compounds in increasing order of their boiling points:
Assertion (A) : The boiling points of alkyl halides decrease in the order : RI > RBr > RCl > RF. Reason (R) : The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass.
Assertion (A) : The boiling points of alkyl halides decrease in the order RI > RBr > RCl > RF. Reason (R) : The van der Waals forces of attraction decrease in the order RI > RBr > RCl > RF.
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