Metallurgy — Chemistry STD 10 — Question

Draw the electron dot diagram and structure of:
magnesium chloride

Ethyl alcohol to Ethane.

Give an equation for preparation of HCl gas by synthesis. State two conditions involved in its synthesis.

You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

(a) Concentrated sulphuric acid should be kept in air-tight bottles. Why?
(b) Write a balanced equation for the preparation of sulphur dioxide by the action of hot conc. sulphuric acid on sulphur.

Copy and complete the following table :

	Name of the products	Name of the catalyst	Approximate ternperature	Approximate pressure
Habers Process

Write the equation for the action of heat on Ammonium nitrate.
State whether the reaction is an example of thermal decomposition or thermal dissociation.

Calculate the weight/mass of: `10^22` atoms of carbon

Explain why dry hydrogen chloride gas does not affect a dry strip of blue litmus paper but it turns red in the presence of a drop of water.