Chemistry Quiz 47 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Which of the following has the smallest atomic mass?

Correct Answer: C) Electron.

2. Which gas is used to manufacture vanaspati from vegetable oil is

Correct Answer: B) Hydrogen.

3. The atomic mass is the number of ..... in the nucleus.

Correct Answer: B) Protons & neutrons.

4. What is the nucleus of an atom?

Correct Answer: B) The center of an atom.

5. Valence electrons are found

Correct Answer: C) In the outermost energy level.

6. Natural rubber is a polymer derived from?

Correct Answer: A) Isoprene.

7. Uranium-235 has 92 protons. How may neutrons do it have?

Correct Answer: B) 92.

8. Fats, oils, and cholesterol are all types of

Correct Answer: C) Lipids.

9. What is Calcium sulphate?

Correct Answer: C) Gypsum salt.

10. All atoms of the same element have the same

Correct Answer: D) Atomic number.

11. The method that cannot be used for removing permanent hardness of water is

Correct Answer: A) Boiling.

12. Air is

Correct Answer: C) A mixture.

13. A solution with very little solvent

Correct Answer: A) Concentrate.

14. The symbol for Sodium

Correct Answer: C) Na.

15. When disaccharides are changed to monosaccharides, the common chemical process involved is

Correct Answer: B) Hydrolysis.

16. What is a metalloid?

Correct Answer: D) An element that has some properties of a metal and some properties of a nonmetal.

17. What among following is used to produce artificial rain?

Correct Answer: A) Silver iodide.

18. What atom matches this electron configuration? [Xe] 6s25d9

Correct Answer: B) Gold.

19. Which biomolecule has sugars and starches?

Correct Answer: C) Carbohydrates.

20. The breakdown of water into hydrogen and oxygen is

Correct Answer: A) Electrolysis.