Chemistry 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%