SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions

 The electronic configuration of ‘Cl’ is ______.

Atomic numbers of A and B are 18 and 19 respectively. What is the electronic configuration of A and B?

How will you define the term ‘electronic configuration’?

Explain the electronic configuration of atoms with an illustration.

Write a short note on oxidizing and reducing agents.

What is a redox reaction?

Mention some oxidation reactions that occur in daily life.

The formation of brown colour on the freshly unit surface of vegetables and fruits is because ______ of organic compounds present in them.

The tendency of atoms to have eight electrons in the outer shell is known as ______.

Oxidizing agents are otherwise called ______.

The tarnishing of metals is due to the formation of ______.

The tarnishing of metals is an example of ______ reaction.

The sum of the oxidation number of all atoms in a compound is ______.

______ is a metal that has a high resistance to corrosion.

Choose the odd one out and write the reason:

Choose the odd one out and write the reason:

Identify the following reactions as oxidation/reduction/redox reaction

Zn + CuSO₄ → Cu + ZnSO₄

Identify the following reactions as oxidation/reduction/redox reaction

CuO+H₂ → Cu+H₂O

Identify the following reactions as oxidation/reduction/redox reaction

2Mg +O₂ → 2MgO

What are reducing agents? Give examples.