An element ‘X’ is soft and can be cut with a knife.

Question:

An element ‘X’ is soft and can be cut with a knife. This is very reactive to air and cannot be kept in open air. It reacts vigorously with water. Identify the

element from the following

(a) Mg

(b) Na

(c) S

(d) Mg

Solution:

(b). Sodium (Na) gives all the characteristics of the element X.

Leave a comment

Close
faculty

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now