Free tnpsc model questions Online Test - MeritNotes

No. of Questions :10

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1. Number of valence electrons in carbon is

2. Total number of electrons in the M shell is

3. Atoms of different elements with the same number of electrons are called

4. Fr, Sr, Ba, Ra which of the elements are radioactive?

5. Modern periodic law states that the physical and chemical properties of elements are the periodic functions of their

6. Which resin commonly called as Thermocol?

7. One Nanometre is

8. The separation of denser particles from lighter particles done by rotation at high speed is called

9. A phenomenon in which an element exists in different modification in same physical state is called

10. In which separation method, a substance changes directly solid to gaseous state when heated?

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