CBSE Class 8 Science Nature of Matter Elements, Compounds, and Mixtures (Class 8 NCERT New) Quiz 5

1. If an atom has an atomic number of 11 and a mass number of 22.99, then the number of electrons that the neutral atom will have will be...

A 22.99 B 23 C 12 D 11

2. An ION is an atom that has either...

A lost an electron B gained an electron C become charged D all of the above are correct

3. The elements in the blue area of the periodic table are...

A metals B gases C non-metals D solids

4. The elements in the red area of the periodic table are...

A metals B gases C non-metals D solids

5. Which of the following IS NOT A PROPERTY of metals?

A Is ductile B Is malleable C Is brittle D Is a good conductor

6. Which of the following IS NOT A PROPERTY of zinc?

A Is ductile B Is malleable C Is brittle D Is a good conductor

7. Which of the following IS NOT A PROPERTY of phosphorus?

A Cannot be polished B Has a dull appearance C Is brittle D Is a good conductor

8. The correct number and type of each atom in the formula above is

A 1 x hydrogen, 2 x sulfur, 4 x oxygen B 2 x hydrogen, 1 x sulfur, 4 x oxygen C 2 x hydrogen, 4 x SO D none of the above are correct

9. Which of the statements about this formula is INCORRECT?

A It contains 5 hydrogen atoms B It contains 2 carbon atoms C It contains 1 oxygen atom D It contains 6 hydrogen atoms

10. Which of the following is an example of the formation of a mixture?

A Rust forming on an iron nail. B Sugar crystals dissolving in water. C Sodium and chlorine forming table salt. D Hydrogen and oxygen reacting to produce oxygen.