Which of the following pairs of transition metals shows anomalously low melting points in their series?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Manganese (Mn) and technetium (Tc)
NCERT (2026-27 edition):
4.3.1 Physical Properties – “… The high melting points of these metals are attributed to the involvement of greater number of electrons from (n-1)d in addition to the ns electrons in the interatomic metallic bonding. In any row the melting points of these metals rise to a maximum at d5 except for anomalous values of Mn and Tc and fall regularly as the atomic number increases.”