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

What is the amount of heat required to raise the temperature of 5 kg of iron from 30°C to 130°C? Specific heat capacity of iron = 483 Jkg^-1C^-1.

A metal ball of heat capacity 50J/°C loses 2000 J of heat. By how much will its temperature fall?

The time is taken by the sun to complete one revolution around the milky way ______.

Satellites move around the planets due to ______ and ______ force.

Assertion: The period of revolution of a satellite around a planet is directly proportional to the radius of the orbit of the satellite.
Reason: Artificial satellites do not follow Kepler’s Laws of motion.

Mention the factors responsible for the motion of the satellite.

What is a cosmic year?

Name the two phases in the separation of the mixtures in chromatography.

Which block of the periodic table contains metals, non-metals, and metalloids?

The outermost shell of an atom cannot accommodate electrons more than ______.

The electronic configuration of an atom is 2,8,3. The valency of the atom is ______.

The maximum No. of electrons that can be accommodated in the M shell is ______.

 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.