Q: 116 (IAS/2008)
question_subject:
Science
question_exam:
IAS
stats:
0,40,34,20,40,6,8
keywords:
{'lightest metal': [0, 0, 1, 0], 'heaviest metal': [0, 0, 1, 0], 'metals': [1, 2, 2, 7], 'mercury': [0, 0, 2, 2], 'aluminium': [1, 0, 3, 2], 'osmium': [0, 0, 1, 0], 'lithium': [0, 0, 3, 6]}
Option 1: Lithium and Mercury - Lithium is indeed the lightest metal, but Mercury is not the heaviest. Hence this option is not correct.
Option 2: Lithium and Osmium - This is the correct answer. Lithium is the lightest metal on the periodic table. Osmium, on the other hand, is the heaviest metal. Therefore, the pair that constitutes the lightest and the heaviest metal, respectively, is lithium and osmium.
Option 3: Aluminium and Osmium - While Osmium is the heaviest metal, Aluminium is not the lightest. So, this answer isn`t correct.
Option 4: Aluminium and Mercury - Neither Aluminium is the lightest nor is Mercury the heaviest metal. Thus, this option is incorrect.