Consider the following chemical reaction –Fe₂O₃(s) + 3CO (g) ⟶ 2Fe (s) + 3CO₂(g)

Solution

CO is reducing agent because it readily accepts oxygen to form CO₂. CO is used as reducing agent to reduce many metallic oxides into metals in metallurgy.

The inert pair effect is most prominent in –

Solution

The inert pair effect is most prominent in the heavier members of the group. Inert pair effect increases as we move the group down the group.

In silica (SiO₂), each silicon atom is bonded to

Pb reacts with dilute HNO₃ and produces

White lead is

Carborundum is

In the manufacture of glass addition of MnO₂ gives :

Solution

Manganese salts are violet or purple coloured. So MnO2 gives violet colour to the glass. Fe³⁺ gives yellow colour mixture of Fe³⁺ & Fe²⁺ gives green colour. CO²⁺ gives deep blue and colloidal particle of Cu gives ruby-red colour.

In laboratory silicon can be prepared by heating

Silicon dioxide is formed by the reaction of

Red lead is:

Solution

Red lead is Pb₃O₄. It is a mixed oxide of Pb (II) and Pb (IV). It acts as a powerful oxidising agent.

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