Q.

Element X forms a chloride with the formula XCl3 , which is a solid with a high melting point X could most likely to be in the same period of the periodic table as

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a

Al

b

Na

c

Mg

d

Si 

answer is C.

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Detailed Solution

Element X belongs to IIIA group with the help of formula  XCl3  and the element X is Al.  the elements with possible formula XCl3  , which both are present in same period are Al and Cl.  It forms ionic compound ACl3  .

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