Identify the element with the help of given information:

  1. It was the first element to be discovered with a spectroscope
  2. It remains liquid at room temperature
  3. It reacts violently with water so it is kept under a layer of kerosene or mineral oil
  4. It is the softest known metal on earth

 Select the correct answer from options given below:

Answer: [A] Cesium

All given properties are of Cesium.
Cesium was the first element to be discovered with a spectroscope. Cesium is the softest known metal on earth. It remains liquid at room temperature. Since it reacts violently with water, it is kept under a layer of kerosene or mineral oil.

This question is a part of GKToday's Integrated IAS General Studies Module