Pulung Santol G7

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Republic of the Philippines Department of Education Region III – Central Luzon PULUNG SANTOL NATIONAL HIGH SCHOOL Porac, Pampanaga SCIENCE QUIZ BEE QUESTIONS QUARTER 1 EASY 1. It is the metal oxides dissolves in water to form bases, it also means “base without water”. a. Acid aldehydes b. Base aldehydes c. Acid anhydrides d. Base anhydrides Correct answer: D. Base anhydrides AVERAGE 1. Which of the following is an example of a fair test? a. To test the effect of water on plants, you use two similar setups (Setup A and Setup B) and water the plants only in Setup A. b. To test the effect of light on the growth of plants, you expose Setup A (mung beans) to light and keep setup B (potato spuds) in a dark room. c. To test the effect of light on the growth of mung beans, you expose Setup A and Setup B to the same amount of light but you introduce water to Setup A. d. To test the effect of fertilizers on the growth of plants, you introduce fertilizers to Setup A (mung beans) and do not introduce fertilizers in Setup B (potato spuds). Correct Answer: A. To test the effect of water on plants, you use two similar setups (Setup A and Setup B) and water the plants only in Setup A. DIFFICULT 1. A classmate states, “All compounds containing H atoms are acids, and all compounds containing OH groups are bases.” Do you agree? Justify your answer. Correct Answer: YES, because according to Arrhenius, acid are molecular compounds with ionizable hydrogen atoms in aqueous solution while the base are molecular compound which ionizes to yield hydroxide ions in aqueous solution. CLINCHER 1. If the two phases are at the same initial pressure there is a net transfer of solvent across the membrane into the solution, what is this process? a. Diffusion b. Elevation c. Osmosis d. Dialysis

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