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

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.

Clean and Fresh water is essential for every human activity.

Nicobar island is one of the biodiversity hotspots in India.

Point out the importance of water conservation.

What is grey water?

What are all the strategies used to support water conservation?

Two spheres have mass and volume in the ratio 2:1. The ratio of their density is ______.

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

One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K.

Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.

Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.

The area under velocity – time graph represents the ______

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

The velocity – time graph of a particle falling freely under gravity would be a straight line parallel to the x axis.

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

If the velocity – time graph of a particle is a straight line inclined to X-axis then its displacement – time graph will be a straight line.

Numerical Problem.

The density of water is 1 g cm–3. What is its density in S.I. units?