SELECT * FROM question_mgmt as q WHERE id=3618 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=256 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Periodic Classification of Element element x forms a chloride with the formula xcl2

Question:

Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as

     (a) Na     (b) Mg     (c) AI     (d) Si

Answer:

(b) X elements from compound XCl2 which is most likely formed compound as magnesium because of having the same valency whereas the rest of other elements as Na, Al and Si don't match the valence electron to that of X.


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