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Why does adding salt to water increase boiling point?
Boiling point elevation explanation.
Black Holes
Why can’t even light escape a black hole?
What is reverse osmosis?
Concept-based question.
Kepler’s Laws
Why do planets move faster when closer to the Sun?
State Faraday’s first law of electrolysis.
Write the formula with units.
Tides
How does the Moon cause ocean tides on Earth?
Calculate EMF of a cell.
Numerical: (\ce{Zn
Pendulum Time Period
Why does a pendulum swing slower on the Moon?
What are fuel cells?
Explain hydrogen-oxygen fuel cell.
Resonance
How can soldiers crossing a bridge cause it to collapse?
Why is a salt bridge used?
Role in galvanic cells.
Sound Waves
Why do we hear thunder after lightning?
Define rate of reaction.
Conceptual question.
Doppler Effect
Why does an ambulance siren sound different when passing by?
What is activation energy?
Use an analogy.
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