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

What are redox reactions? Give examples.

What is rancidity?

Define oxidation number.

Find the oxidation number of the element in the following compound.

Zn in ZnSO₄

Find the oxidation number of the element in the following compound.

Ca in CaH₂

Find the oxidation number of the element in the following compound.

Mg in MgO

Find the oxidation number of the element in the following compound.

N in NH₃

Find the oxidation number of the element in the following compound.

A1 in AlCl₃

Describe the tests used to determine acids and bases.

Phenolphthalein and methyl Orange are ______.

Choose the odd one out & give a reason:

Choose the odd one out & give a reason:

The antimalarial drug obtained from Cinchona bark is ______.

______ is used as an additive with other antimalarial drugs. 

______ is due to an imbalance in the acidity in the stomach. 

Name the components of xylem and phloem.

Finger-like projections enhance the absorbing capacity of the small intestine.

Define the following:

Toxin 

Differentiate Exotoxins and Endotoxins.

Which of the following is one of the strategies to conserve water?