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

A salt may be ______.

Solutions of acids conduct ______.

______ change the colour of the indicators.

Which acid is present in milk?

Can we taste acids and bases to identify them?

Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.

Copper or brass cooking vessels are coated with tin metal. Why?

Take a clean test tube with a holder and pour some dilute hydrochloric acid. Add a few pieces of magnesium ribbon pieces slowly. What do you observe? Now show a burning match stick near the mouth of the test tube. Do you hear any sound? The gas burns with a pop sound. From this, it is observed that hydrogen gas has been formed due to the reaction between acid and metal.

Hydrocarbons are present in different ______ and ______.

______ is a blue-green algae.

Polvsiohonia is a ______ alga.

______ is used in space travel.

______ is an edible algae.

Classification of algae was given by ______.

Minute algae floating on the surface of the water are called ______.

______ is an example of symbiosis between algae & fungi.

______ got from algae is used to prepare growth medium in laboratories.

Agar-Agar is extracted from red algae.

The cell wall of algae is made up of a chemical substance called chitin.

What is phytoplankton?