The table shows the melting points and boiling points of six elements P, Q, R, S, T and U. These elements represent consecutive members of periods 3 and 4 of the periodic table. 0.2 mol of the chloride of element U reacts with excess of silver nitrate to form 57.4 g of silver chloride. The formula of chloride is (Given : Atomic mass of N = 14 u, O = 16 u, CI = 35.5 u, Ag = 108 u)
A
Ucl
B
`U Cl_2`
C
`U Cl_3`
D
`U Cl_5`
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The correct Answer is:
B
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