Metals and Non-Metals — Science STD 10 — Question

The elements A, B and C belong to groups 1, 14 and 17 respectively of the periodic table.

1. Which two elements will form a covalent compound?
2. Which two elements will form an ionic compound?

Express the following facts in the form of a balanced chemical equation:

“When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed”.

What is a chemical equation? Explain with the help of an example.

Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?

What are the raw materials required for making soap in a laboratory (or at home)?

Write the balanced chemical equations for the following reaction.
Sodium carbonate on reaction with hydrochloric acid in equal molar concentrations gives sodium chloride and sodium hydrogencarbonate.

Give one example, with equation, of the displacement of hydrogen by a metal from an acid.

Zinc oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reaction. Name:

1. Oxidising agent, and
2. Reducing agent, in this reaction.

Write the product by giving balanced chemical equation.
When phosphorus reacts with conc. sulphuric acid.