General Science Class 9 MCQS

Name the material of screen which used in Rutherford atomic model?

1. Aluminum foil
2. Zinc sulphide
3. Sodium sulphide
4. Aluminum sulphide

Which rays are used for sterilization of medical instruments?

1. α-rays
2. β-rays
3. γ-rays
4. x-rays

In 1869 Mandeleev put forward his periodic law about :

1. Atomic Number
2. Chemical properties
3. Physical properties
4. Atomic Mass

The periodic table divided into S, P, d, and f block based on :

1. Atomic Radius
2. Electronic Configuration
3. Ionization Energy
4. Electron Affinity

4th and 5th period in periodic table are known as?

1. Short period
2. Long period
3. Normal period
4. Very long period

Which one of the following decreases along the period?

1. Ionization Energy
2. Atomic Radius
3. Electronegativity
4. Electron Affinity

The elements of VIIA group are known as :

1. Lanthanides
2. Actinides
3. Halogens
4. Nobel Gases

According to Mosely the chemical properties of elements are the periodic function of their?

1. Atomic Size
2. Atomic Mass
3. Atomic Radius
4. Atomic Number

The shielding effect across the period :

1. Increases
2. Decrease
3. Moderate
4. Same

The ability to attract shared pair of electron is called :

1. Electron Affinity
2. Electronegativity
3. Ionization Energy
4. Shielding Effect