Which of the Following Elements Is the Least Chemically Reactive

question 7

Multiple Choice

Which of the following elements is the least chemically reactive?

• A) N₂
• B) O₂
• C) F₂
• D) Cl₂
• E) P₄

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Definitions:

Gonioscope

An optical instrument used to examine the angle of the anterior chamber of the eye.

Keratometer

An instrument used to measure the curvature of the anterior surface of the cornea, particularly in determining the degree of astigmatism.

Exophthalmometer

An instrument used to measure the degree of forward displacement of the eyeball, as seen in conditions like Graves' disease.

Tonometer

An instrument used to measure the pressure inside the eye, important in glaucoma diagnosis.