1.

      What are the elements which are liquids at room temperature and standard pressure? [CDS] 1.  Helium              2.  Mercury 3.  Chlorine            4.  Bromine Select the correct answer using the codes given below

A. 2 and 3           
B.          2, 3 and 4
C. 2 and 4      
D. 1 and 3
Answer» D. 1 and 3


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