Chemistry Quiz 47 (20 MCQs)

Quiz Instructions

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1. The total number of electrons in a neutral atom equals the number of

Correct Answer: C) Protons in its nucleus.

2. Organic molecules come from ..... things and always contain at least ..... and .....

Correct Answer: D) Living, Carbon, Hydrogen.

3. H+ ions are usually found in ..... solutions.

Correct Answer: A) Acidic.

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

Correct Answer: C) Electron.

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

Correct Answer: B) Hydrogen.

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

Correct Answer: B) Protons & neutrons.

7. What is the nucleus of an atom?

Correct Answer: B) The center of an atom.

8. Valence electrons are found

Correct Answer: C) In the outermost energy level.

9. Natural rubber is a polymer derived from?

Correct Answer: A) Isoprene.

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

Correct Answer: B) 92.

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

Correct Answer: C) Lipids.

12. What is Calcium sulphate?

Correct Answer: C) Gypsum salt.

13. All atoms of the same element have the same

Correct Answer: D) Atomic number.

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

Correct Answer: A) Boiling.

15. Air is

Correct Answer: C) A mixture.

16. A solution with very little solvent

Correct Answer: A) Concentrate.

17. The symbol for Sodium

Correct Answer: C) Na.

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

Correct Answer: B) Hydrolysis.

19. What is a metalloid?

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

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

Correct Answer: A) Silver iodide.