Carbon and its Compounds — Science STD 10 — Question

A substance X which is used as an antacid reacts with dilute hydrochloric acid to produce a gas Y which is used in one type of fire-extinguisher. Name the substance X and gas Y. Write a balanced equation for the chemical reaction which takes place.

What is meant by an addition reaction? Give an example (with equation) of an addition reaction of an alkene.

In nature, metal A is found in a free state while metal B is found in the form of its compounds. Which of these two will be nearer to the top of the activity series of metals?

What is meant by the ‘concentration of ore’?

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.

Write a balanced chemical equation for each of the following reaction and also classify them.
Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

What is meant by a chemical reaction? Explain with the help of an example.

Why are vegetable oils healthy as compared to vegetable ghee? How are vegetable oils converted into vegetable ghee? Name the process.

What is the nature of the oxide SO? What happens when it is dissolved in water ? Write the chemical equation of the reaction involved.

What happens when an acid reacts with a metal oxide? Explain with the help of an example. Write a balanced equation for the reaction involved.