Ncert Exercises & Solutions

Match the properties given in Column I with uses given in Column II

Column I-(Property)		Column II-(Metal)
A.	An element that can show +8 oxidation state	1.	Mn
B	3d block element that can show up to +7	2.	Cr
C	3d block element with the highest melting point	3.	Os
		4.	Fe

	A	B	C
1.	3	1	2
2.	1	2	3
3.	1	4	3
4.	4	2	3

HINT: Osmium is the element that can show +8 oxidation state.

Explanation:

A. Osmium is an element that can show a +8 oxidation state because its electronic configuration is 5d⁶ 6s² and all these electrons take part in the reaction.

B. 3d block element that can show up to +7 oxidation state is manganese because its electronic configuration is 3d⁵ 4s² and all these electrons take part in the reaction.

C. 3d block element with the highest melting point is chromium.

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