MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic ChemistryPeriodic PropertiesPrevious Year Questions

The increasing order of the density of alkali metal is (Kerala CEE 2011)

A.Li < K < Na < Rb < Cs✓ Correct

B.Li < Na < K < Rb < Cs

C.Cs < Rb < Na < K < Li

D.Cs < Rb < K < Na < Li

Explanation

On moving down in a group, density increases but the density of K is somewhat lesser than that of Na. Due to abnormal increases in size of K atom. Thus, the order of density is Li < K < Na < Rb < Cs PERIODIC PROPERTIES 55

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