GK
BASIC GENERAL KNOWLEDGE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which one of the following is the softest?
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Lithium____
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Calcium
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Aluminium
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Iron
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Explanation:
Detailed explanation-1: -* Caesium is the softest metal with the Mohs hardness of 0.2.
Detailed explanation-2: –Therefore two metals that are soft in nature are Na which can be cut with a knife and Cs which is the softest in the group.
Detailed explanation-3: -Cesium is a rare, silver-white, shiny metal with brilliant blue spectral lines; the element’s name comes from “caesius, ‘’ a Latin word meaning “sky blue.” It is the softest metal, with a consistency of wax at room temperature.
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