SSLC (English Medium) इयत्ता ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

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?

Specific constituents such as nitrogen, phosphorus, suspended solids, and heavy metals found in the wastewater are removed during the ______ treatment of the water recycling process.

World Water Day is celebrated on ______.

Which one of the following is not an advantage of farm ponds?

Floating leaves have long ______ to enable the leaves to move up and down in response to changes in water level.

The theme for World Water Day 2018 is ______.

The microorganism used in file secondary treatment must be separated from treated wastewater by ______.

Match the following:

Sublimation is the conversion of solid into a liquid.