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

Total number of electrons that can be accommodated in an orbit is given by __________.

Name an element which has the same number of electrons in its first and second shell.

Write the electronic configuration of K and Cl

For an atom ‘X’, K, L and M shells are completely filled. How many electrons will be present in it?

Oxidising agents are also called as ______ because they remove electrons form other substances.

Identify the following reactions as oxidation or reduction

1. Na → Na+ + e
2. Fe3+ + 2 e- → Fe+

Find the oxidation number of the elements in the following compounds. 

1. C in CO2
2. Mn in MnSO4
3. N in HNO3

Excretory organ of tape worm is ______.

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

Hermaphrodite animals have both male and female sex organs.

Differentiate between flat worms and round worms?

The opening of the stomach into the intestine is called ______.

The longest part of alimentary canal is ______.

How is the small intestine designed to absorb digested food?

Microbes that generally enter the body through nose are likely to affect ______.

Why is it important to conserve water?

The area under velocity time graph represents ______.

The slope of the distance-time curve is steeper/greater is the ______.

The slope of the distance-time graph indicates the speed.

Assertion: The position-time graph of a uniform motion in one dimension of a body can have a negative slope
Reason: When the speed of the body decreases with time then, the position-time graph of the moving body has a negative slope.

Assertion: The slope of the distance-time graph of a body moving with high speed is steeper than the slope of the distance-time graph of a body with low velocity.
Reason: Slope of distance-time graph = speed of the body.