Carbon and its Compounds — Science STD 10 — Question

Write names and formulae of hydrocarbons containing a single and a double bond (one example for each). Give one characteristic chemical property of each.

What happens during a wasp sting? What is its remedy?

Write the balanced chemical equations for the following reaction.
Copper sulphate on treatment with potassium iodide precipitates cuprous iodide (Cu₂I₂), liberates iodine gas and also forms potassium sulphate.

Blue litmus solution is added to two test tubes A and B containing dilute HCl and NaOH solution respectively. In which test tube a colour change will be observed? State the colour change and give its reason.

Draw the structures for the following compounds:

1. Ethanal.
2. Propanal.
3. Butanal.
4. Pentanal.

Show the formation of magnesium chloride from magnesium and chlorine by the transfer of electrons.

Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.

What happens when a cold and concentrated solution of sodium chloride reacts with ammonia and carbon dioxide? Write the chemical equation of the reaction which takes place.

Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H₂SO₄.

Name the acids or alkalis used to make,

1. Car batteries.
2. Explosives.
3. Soaps.
4. Fertilisers..