An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following (a) Mg (b) Na (c) P (d) Ca
ScienceClass 10CBSEAnswered 27 Mar 2026
Answer
Soln:
Answer is (b) Na
Explanation:
Sodium is soft which can be cut with a knife. Sodium reacts with water and air vigorously hence it is kept in kerosene.