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

Between which two points of a concave mirror should an object be placed to obtain a magnification of -2?

To obtain an image twice the size of the object, between which two points related to a concave mirror should an object be placed?

Which among the following statements is correct?

1. Meteors are attracted by the gravitational the force of earth.
2. Meteors are traveling at low speeds.
3. Most of the Meteors are burnt by the heat generated by friction in the atmosphere.

The biggest asteroid is ______.

Comets revolve around the Sun in highly spiral orbits.

Assertion: The outer planets are called Terrestrial Planets.
Reason: Outer planets are made up of hydrogen, helium, and other gases in huge amounts and have very dense atmospheres.

Write short notes on Asteroids.

Differentiate Meteors and Meteorites?

Write short notes on Halley’s comet.

d-block elements are otherwise known as ______.

If the electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p¹’then it will
occupy ______ block of the periodic table.

f-block elements are also known as ______.

______ block element is placed at the bottom of the periodic table. 

What are the s-block elements?

What are the p-block elements

Group 1 (except hydrogen) elements are called alkali metals.

d-block elements are called transition elements.

Group 3-12 elements in the modern periodic table are called d block elements.

Assertion (A): Group 2 elements in the modem periodic table are called alkaline earth metals.
Reason (R): The oxides of group 2 elements produce alkaline solutions when they are dissolved in water.

Assertion (A): Noble gases are chemically inert in nature.
Reason (R): Noble gases have stable electronic structures.