What chemical principle is involved in choosing a reducing agent for getting the mètal from its oxide ore? Consider the metal oxides `Al_2 O_3` and `Fe_2 O_3`, and jústify the choice of the reducing agent.

A reducing agent is required to extract the metal from its ore. Why? Explain with example.

In the extraction of Fe from 'Fe_2 O_3' the reducing agent is

Carbon is used as a reducing agent to obtain metals from their ores. It is used in the extraction of : Cu, Ag, Cr, Pb,Zn,Fe

Identify the oxidising and reducing agents in the reaction: Cus +O_2 rarr Cu+SO_2

H_(2)O_(2) act as reducing agent when it reacts with

Which element in 3d-series is a strong reducing agent in its +2 oxidation state ? Ti V Cr Mn

Balance the chemical equation Al +O_2 rarrAl_2O_3

If an element is in its highest possibel oxidation state in a compound, it can act as an oxidising agent. If an element is in its lowest possible oxidation state in a compound, if can act as reducing agent. If an element is in the intermediate oxidation state in a compound, it can serve as both oxidising and reducing agent. Based on the above three guidelines, classify the following compounds into three categories and post them in the table given below. KMnO_4 , H_2O_2 , H_2C_2O_4 , FeSO_4 , HCIO_4 , SO_2 , Na_2S_2O_3 , K_2Cr_2O_7