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Science → Quiz → Chemistry Quiz from 6 to 10. Link to Chemistry Quiz (PDF) is given below. Answers to these questions are given after the 5th quiz.

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6. The best soil pH value for most crops and plants is
(A) 4.5
(B) 5.5
(C) 6.5
(D) 7.5

7. __________ are biological catalysts.
(A) Enzymes
(B) Minerals
(C) Proteins
(D) Vitamins

8. The most abundant constituent in Air is
(A) Oxygen
(B) Hydrogen
(C) Carbondioxide
(D) Nitrogen

9. Isotopes are atoms of the same element with different numbers of
(A) Protons
(B) Electrons
(C) Neutrons
(D) Positron

10. Over __________ of the elements in the Periodic Table are Metals.
(A) 60%
(B) 65%
(C) 70%
(D) 75%

ANSWERS: CHEMISTRY QUIZ
6. (C) 6.5
7. (A) Enzymes
8. (D) Nitrogen
9. (C) Neutrons
10. (D) 75%

Chemistry Quiz (PDF)
Download the Chemistry Quiz in PDF from this page.