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

Spot the error:

There are 5 periods and 17 groups in the modern periodic table.

An element has the atomic number 12.

1. Write the electric configuration.
2. To which group and period does it belong.

Explain the position of hydrogen in the periodic table.

______ acid is used in aerated drinks.

What are organic acids? Given examples.

How are acids classified based on ionization? Give examples.

Acetic acid (CH₃COOH) is a mono-basic acid.

Match the following:

Choose the odd one out & give a reason:

Choose the odd one out & give a reason:

Explain the classification of acids based on their basicity.

______ is the first organic compound synthesized in the laboratory. 

______ is the Father of Modem Organic Chemistry.

The inorganic carbon compound that takes past in photosynthesis is ______.

Assertion (A): The number of carbon compounds alone is more than the number of compounds of all the elements taken together.
Reason (R): Carbon has some unique properties such as

1. Catenation
2. Tetravalency
3. Multiple bonds
4. Allotropy
5. Isomerism.

Assertion (A): There are various classes of carbon compounds formed.
Reason (R): The property of Isomerism is the main reason.

How did the ancients obtain charcoal?

Name two inorganic carbon compounds which are used as an antacid?

Name the primary factor that determines the physical and chemical properties of compounds.