11.4 Alkynes — Chemistry STD 10 — Question

Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?

Answer the following question with respect by hydrogen :
Explain why powdered coke is sprinkled over than electrolytic mixture.

Draw the electron dot diagram and structure of :
methane

(a) Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?
(b) Name the other ion formed when ammonia dissolves in water.
(c) Give one test that can be used to detect the presence of the ion produced in (b).

Name the oxide of sulphur which reacts water to give sulphuric acid.
In the contact process, the direct reaction between oxide of sulphur and water is avoided. In this process what does the oxide of sulphur react with instead of water, and what is the name of the product?

What is the difference between :
A polar covalent compound and a non-polar covalent compound?

Write the equation for the following reactions which result in the formation of ammonia.
(i) A mixture of ammonium chloride and slaked lime is heated.
(ii) Aluminium nitride and water.

One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state no visible reaction.
Sodium chloride solution and sodium nitrate solution.

Explain the following:
Cold water has no action on aluminium.