Which element must be present for a substance to be classified as organic?
A) Iodine
B) Iron
C) Carbon
D) Calcium
Correct Answer:
Verified
Q12: Which of the following is true of
Q13: Which process refers to the dissociation of
Q14: Which of the following increases the speed
Q15: Which of the following are located in
Q16: The sharing of electrons is referred to
Q18: Which of the following represents bicarbonate,an anion
Q19: [H⁺] refers to
A)an isotope of hydrogen.
B)heavy hydrogen.
C)hydrogen
Q20: Which of the following is an anion?
A)NaCl
B)KCl
C)H₂SO₄
D)HCO₃-
Q21: Iron can be a(n)
A)anion.
B)electrolyte.
C)acid.
D)cation.
Q22: Zinc,selenium,cobalt,and iodine are all
A)trace elements.
B)compounds.
C)radioactive.
D)isotopes of hydrogen.
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