Chemistry Extra Credit Assignment 11-21-12
*It’s the beginning of the 2nd marking period and I want all of you to have a chance to improve your semester grade. You must complete these trivia questions and have them submitted before the end of the hour today. The assignment is worth 10 pts like a normal assignment. However if you get 80% or better of the questions correct you will get an additional 20 pts added to your point total this semester for a total of 30 EC points. Time is of the essence my budding chemists!!! Now GO….seek thee thine extra credit!! J
1. This chemical compound occurs naturally in tea and coffee and is a popular additive to soft drinks.
2. I want to bake a cake and go to my cupboard to get some sucrose. What ingredient am I looking for?
3. I have almost finished the batter for my cake, but there's one more thing I have to add: I get a teaspoon and add some sodium bicarbonate to my batter. What have I just added?
4. My cake is now happily baking in the oven, but I am already hungry. I decide to go to the shop around the corner for some hot chips. When I bring them home, I sprinkle some dilute acetic acid on them before I eat them. What did I just put on my chips?
5. I am chopping some vegetables for dinner. This particular vegetable is making my eyes all teary due to the propanthial S-oxide it contains. Which vegetable am I chopping?
6. Looking through my cupboards, I see that I am almost out of sodium chloride. What will I need to buy next time I go shopping?
7. This popular comfort food has an active ingredient called phenylethylamine. What is it?
8. I'm peeling a fruit and the beautiful aroma of limonene wafts up to my nose. What fruit am I peeling?
9. Having had enough of crying over my chopping board, I move on to chopping another vegetable. I can't resist tasting a little bit of what I've chopped and the taste of capsaicin explodes in my mouth. Which vegetable am I chopping?
10. I'm slicing one last vegetable for dinner - this one is stunningly-colored due to the beta-carotene it contains. Which vegetable is it?
11. Methylated spirits is a very common household chemical - but what is its main component?
12. Most people have used superglue at one stage or another, but what is its major chemical component?
13. Bleach is another useful household chemical. It is often referred to as "chlorine bleach", but this is a misnomer. What is the main component of household bleach?
14. Nail polish remover is something that us girls just can't do without. Which of the following has been used as the active ingredient in nail polish remover?
15. If you've been in the unfortunate situation of having to use a fire extinguisher to fight a fire , you've probably noticed that there are lots of different types. One of these types is the "dry ice" extinguisher. What is dry ice?
16. The humble pencil is something found in just about every household. Often called "lead pencils", the substance in the middle of the pencil that does the writing actually isn't lead at all; what is it?
17. Another common adhesive used around the home is woodworking glue, also known as PVA glue, Aquadhere and many other names. What is the major component of this adhesive?
18. Aspirin can be found in many household medicine cabinets. But what is it chemically?
19. "Antifreeze" is used in car radiators to stop the liquid that cools the engine from, well, freezing when it gets cold outside. Water is one component of antifreeze; what is the other main component?
20. If you wanted to lighten your hair at home, what is the active ingredient in the dye preparation that will lighten your hair?
21. Which gas, finally isolated in 1866, is pale yellow in colour, and is both highly toxic and corrosive?
22. Which of the "noble" gases, discovered in 1898, is characterized by its bright orange and green spectral lines?
23. This gas becomes liquid at -196C. It is essential to life, and is a component of all proteins.
24. This gas is the second most abundant element in the universe, and has the lowest melting point of any element.
25. Care must be taken when handling this radioactive gas. Long term exposure to even minute quantities, can cause lung cancer.
26. This gas is used with helium in making gas lasers, but is no doubt better known for its use in lighting.
27. This gas is used as a protective atmosphere for growing silicon and germanium crystals.
28. This gas is used as a protective atmosphere for growing silicon and germanium crystals.
29. As we all are aware, lasers have become a part of our lives. From surgeries to supermarkets, they are everywhere. In the most common laserbeam, which two gases are combined to form the laser?
30. Anode rays and protons were discovered by which chemist?
31. The word "Plumber" is derived from the name of which element?
32. Which chemical element is named after the creator of dynamite?
33. What is the chemical formula for "Milk of Magnesia"?
34. What does pH stand for?
35. This metal oxide is often added to paint to make it bright white.
36. Henna has been used since ancient times to dye hair. But what is the compound present in henna that creates the red color?
37. What is the name of the pigment present in hair that gives it a dark colour?
38. This dye can be obtained from the woad plant and has been used for centuries as a blue colorant.
39. What is the name of the pigment that gives tomatoes their red color?
40. This expensive spice has a beautiful yellow colour and is used not only in food, but also as a dye.