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

What is specific heat capacity?

Numerical Problem.

What is the heat in joules required to raise the temperature of 25 grams of water from 0°C to 100°C? What is the heat in Calories? (Specific heat of water = `(4.18"J")/("g"°"C")`

Numerical Problem.

What could be the final temperature of a mixture of 100 g of water at 90 °C and 600g of water at 20°C.

Numerical Problem.

How much heat energy is required to change 2 kg of ice at 0°C into water at 20°C? (Specific latent heat of fusion of water = 3,34,000 J/kg, Specific heat capacity of water = 4200 JKg–1K–1).

India’s first satellite is ______.

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

Satellites nearer to the Earth should have lesser orbital velocity.

Define time period of a satellite.

What is a satellite? What are the two types of satellites?

Name the apparatus that you will use to separate the components of mixtures containing two,

1. miscible liquids,
2. immiscible liquids

Name the components in each of the following mixtures.

1. Ice cream
2. Lemonade
3. Air 
4. Soil

The correct electronic configuration of potassium is ______.

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

The maximum number of electron in L Shell is 10.

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 ______.