SSLC (English Medium) इयत्ता ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Consider the statement given below and choose the correct option.

Assertion: A system can be converted from one state to another state.

Reason: It takes place when the temperature of the system is constant.

Numerical Problems.

An iron ball requires 1000 J of heat to raise its temperature by 20°C. Calculate the heat capacity of the ball.

Match the following.

Give a reason for the following.

When a comb is rubbed with dry hair it attracts small bits of paper.

How charges are produced by friction?

The pictorial symbol for water given by the alchemists was

Symbol of mercury is

The symbol of tungsten is _______.

Write the constituent elements and their symbols for the following compounds.

1. Carbon monoxide
2. Washing soda

Write the symbols for the following elements.

1. Oxygen
2. Gold
3. Calcium
4. Cadmium
5. Iron

What does a chemical symbol represent?

Define Alchemy.

Name the elements with the following symbols.

1. Na
2. W
3. Ba
4. Al
5. U

Loading speeds up the process of ________.

Sea water is suitable for irrigation as it contains dissolved salts.

The density of water will not change at all temperature?

Give a reason for the following.

Sea water is unfit for drinking.

Define the following.

Potable water

What is a neutralization reaction?

The term petroleum means ________