Question

State the following:

1. A gaseous reducing agent which is basic in nature.

2. A metal which cannot be used for the preparation of hydrogen using dilute acids.

3. A solution which absorbs the impurity H2S.

4. A gas which can be removed by using KOH

5. A metal below iron but above copper in the activity series of metals which has no reaction with water.
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Answer 1

Answer:

1.A gaseous reducing agent which is basic in nature.

==> NH3  - Ammonia is basic in nature as it has a lone pair and also it can act as a reducing agent as nitrogen is the lowest oxidation state thus nitrogen can be oxidized thus reducing the other substance. Thus it acts as both a reducing agent as well as a base.

2. A metal which cannot be used for the preparation of hydrogen using dilute acids.

==>Metals which lie below hydrogen in the activity series i.e. Cu, Ag, Au cannot displace hydrogen from dilute acids, because they are less reactive than hydrogen. 8.