Asked: I.A.S. (Pre) 2008medium Level
QUESTION STATEMENT:द्विभाषी / Bilingual
निम्नलिखित धातु-युग्मों में से किस एक में क्रमशः सबसे हल्की धातु तथा सबसे भारी धातु है?
Which one of the following pairs of metals contains the lightest and heaviest metal respectively?
SELECT CORRECT OPTION:
A
लिथियम एवं पारा
Lithium and Mercury
B
लिथियम एवं ऑस्मियम
Lithium and Osmium
Correct
C
एल्युमीनियम एवं ऑस्मियम
Aluminium and Osmium
D
एल्युमीनियम एवं पारा
Aluminium and Mercury
Official Solution & Explanation:
Correct Answer: Option B(लिथियम एवं ऑस्मियम)
प्रकृति में सबसे हल्की धातु लिथियम ($Li$, घनत्व लगभग $0.534\text{ g/cm}^3$) है तथा सबसे भारी (सर्वाधिक घनत्व वाली) धातु ऑस्मियम ($Os$, घनत्व $22.61\text{ g/cm}^3$) है।
Lithium is the lightest known metal (density $\approx 0.534\text{ g/cm}^3$), while osmium is the densest (heaviest) naturally occurring metal (density $\approx 22.61\text{ g/cm}^3$).
Subject: General Science•Topic: Metals, Minerals, Ores: Properties and Uses•Subtopic: Metals, Minerals, Ores: Properties and Uses
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