9.2 Nitric Acid — Chemistry STD 10 — Question

Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.

Which metal occurs as: A sulphide also give the name of their respective ore.

Name a non-metallic element which forms acidic and neutral oxides

State the position of the following in the periodic table:
Alkali metals

Name the following:
or
With reference to the physical propertie of metals and non-metals, state the following exception.
A metal which is liquid at room temperature.

One metal which forms more than one type of positive ions.

Basic anhydride of calcium hydroxide.

To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.

Name the Following:
Product obtained by the catalytic oxidation of ammonia.