A black metal oxide `XO_(2)` is used as catalyst in the preparation of oxygen gas from potassium chlorate. The oxide `XO_(2) ` is also used in ordinary dry cells. The metal oxide `XO_(2)` cannot be reduced satisfactorily with carbon to form metal X. (a) Name the metal X. (b) Name the metal oxide `XO_(2)` (c) Which reducing agent can be used to reduce `XO_(2)` to obtain metal X? (d) Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.

A black metal oxide `XO_(2)` is used as catalyst in the preparation of

1.	A black metal oxide `XO_(2)` is used as catalyst in the preparation of oxygen gas from potassium chlorate. The oxide `XO_(2) ` is also used in ordinary dry cells. The metal oxide `XO_(2)` cannot be reduced satisfactorily with carbon to form metal X. (a) Name the metal X. (b) Name the metal oxide `XO_(2)` (c) Which reducing agent can be used to reduce `XO_(2)` to obtain metal X? (d) Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
Answer» (a) Manganese (b) Manganese dioxde (c) Aluminium (d). Chromium

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