General Science
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Showing 71–74 of 74 questions
Organ that pumps blood?
Correct Answer:
C. Heart
EXPLANATION
Heart pumps blood.
Chemical formula of water?
Correct Answer:
B. H2O
EXPLANATION
Water = H₂O.
Which celestial phenomenon occurs when the Moon passes between the Earth and the Sun, blocking the Sun's light and casting a shadow on Earth?
Correct Answer:
A. Solar Eclipse
EXPLANATION
A solar eclipse happens when the Moon's orbit places it directly between Earth and the Sun, creating a shadow on Earth's surface.
This is distinct from a lunar eclipse where Earth blocks sunlight from reaching the Moon, and from penumbral or annular eclipses which are specific types with different characteristics.
Which of the following elements has the highest electronegativity value on the Pauling scale?
Correct Answer:
A. Fluorine
EXPLANATION
Fluorine has the highest electronegativity value of 3.98 on the Pauling scale, making it the most electronegative element.
This is because it has the smallest atomic radius and the highest effective nuclear charge among all elements, causing it to attract electrons most strongly in a chemical bond.