9.2 Nitric Acid — Chemistry STD 10 — Question

Name the ions furnished by : an acid

With reference to the reduction of copper (II) oxide , iron (II) oxide, lead (II) oxide and magnesium oxide; place the oxides in order of increasing ease of reduction.[i.e. first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.]

Define the term catenation.

The gas obtained when rock salt reacts with conc. sulphuric acid.

A suitable cathode used in the electrorefining of copper.

Write balanced equation for the reaction between iron and dilute sulphuric acid.

Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (II) sulphide

In a group, a particular element has the lowest ionization potential; does it ionize most easily or least easily? Explain with example.

Give reason for the following:
A piece of wood becomes black when concentrated sulphuric acid is poured on it.