SSLC (English Medium) कक्षा ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Write the reaction of oxygen with non–metals.

Write a note on the rusting process.

Atoms of all metals will have ______ electrons in their outermost orbit.

All non–metals will have ______ electrons in the outermost orbit of their atoms.

The maximum number of electrons that can be present in the N shell is ______.

Anode rays travel in straight lines.

The relative charge of an electron is – 1. 

In a television tube, Cathode rays are deflected by magnetic fields.

An atom has a number of orbits and each orbit has protons.

Helium has two electrons in the outermost orbit and so it is chemically inert.

When an atom gains an electron it has more electrons and thus it carries a positive charge.

Assertion: Helium has four electrons in the outermost orbit.
Reason: Neon has eight electrons in the outermost orbit.

Which one of the following has the highest latent heat of vaporization?

Pure water is ______ and it shows no action towards litmus paper.

______ does not react with water at any temperature.

Write a short note on the catalytic nature of water.

Write the chemical equation for the production of water when zinc reacts with sulphuric acid.

Write a note on coke.

______ is a unicellular fungus.

The study of fungi is called ______.