Acids, Bases and Salts — Science STD 10 — Question

Write a balanced chemical equation for each of the following reaction and also classify them.
Iron (III) oxide on heating with carbon monoxide gas reacts to form solid iron and liberates carbon dioxide gas.

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?

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

A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemical compound.

Carbon, Group (14) element in the Periodic Table, is known to form compounds with many elements.
Write an example of a compound formed with,

1. Chlorine (Group 17 of Periodic Table)
2. Oxgygen (Group 16 of Periodic Table)

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configurations of these two elements. Which of these will be more electronegative? Why?

Explain why, though aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.

State the law of conservation of mass.

Consider the following organic compounds:
HCHO, C₂H₅OH, C₂H₆, CH₃COOH, C₂H₅Cl
Choose two compounds which can react in the presence of conc. H₂SO₄ to form an ester. Give the name and formula of the ester formed.

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