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

Number of vibrations produced in one second is ______.

Vibration of object produces ______.

Match the following.

Through which medium sound travels faster, iron or water? Give reason.

How does the sound produced by a vibrating object in a medium reach your ears?

Describe with diagram, how compressions and rarefactions are produced.

State whether true or false. If false, correct the statement.

Oil and water are immiscible with each other.

Diffentiate between absorption and adsorption.

The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.

Example for liquid metal is ______.

State whether true or false. If false, correct the statement.

Metals can gain electrons.

Number of valence electrons in carbon is ______.

Sodium having atomic number 11, is ready to ______ electron/ electrons to attain the nearest noble gas electronic configuration.

The element that would form anion by gaining electrons in a chemical reaction is ______.

Elements with stable electronic configurations have eight electrons in their valence shell. They are ______.

How do atoms attain Noble gas electronic configuration?

Explain Octet rule with an example.

Complete the table give below.

Draw the electron distribution diagram for the formation of Carbon di oxide (CO2 ) molecule.

An atom X with atomic number 20 combines with atom Y with atomic number 8. Draw the dot structure for the formation of the molecule XY.