Samir Belhout took on UCD AFC's Chemistry Test.
I decided to study Chemistry after entering UCD through General Sciences. In the first year I studied Chemistry, Biology and Physics. Chemistry was the one that came easiest to me so I decided to major in it. Chemistry is more straightforward than people think, you learn rules and processes that are then applied. I do get a bit of a hard time from the lads for studying Chemistry, with Lediwth and Corry always ready to put the boot in because I'm a geek. It probably doesnt help with my love of all things Star Wars!
Samir's answers are in Bold and the Correct Answer is marked with... CORRECT ANSWER!
Q 1: Dihydrogen monoxide is:
1. A strong acid that will eat through glass.
2. A strong base that reacts vigorously with metal.
3. More explosive than TNT.
4. Safe enough to drink. CORRECT ANSWER!
Q2: TNT is a well-known explosive. TNT stands for:
1. Trinitrotoluene CORRECT ANSWER!
2. Tetranitrotoluene
3. Trinitrotriglycerine
4. Tert nitrotetramine
Q3: You use paper products every day. Paper is made from which natural polymer?
1. Cellulose CORRECT ANSWER!
2. Chitin
3. Keratin
4. Elastin
Q 4: Which of the following is not an element?
1. Copernicium
2. Holmium
3. Kryptonite CORRECT ANSWER!
4. Berkelium
Q 5: Which of these pure elements would be dangerous to hold in the palm of your hand?
1. Sodium CORRECT ANSWER!
2. Zinc
3. Sulphur
4. Gallium
Q 6: A deficiency of vitamin C may result in a medical condition known as scurvy. You can avoid getting scurvy by eating foods rich in vitamin C, such as citrus fruits. Vitamin C is also known as:
1. Niacin
2. Carbonic acid
3. Ascorbic acid CORRECT ANSWER!
4. citric acid
Q 7: The last column in the Periodic Table contains the noble gases. Which of these elements is not a noble gas?
1. Neon
2. Bromine CORRECT ANSWER!
3. Krypton
4. Argon
Q 8: Protium, deuterium and tritium are all forms of which element?
1. Hydrogen CORRECT ANSWER!
2. Helium
3. Carbon
4. Iron
Q 9: Which of the following is an example of a physical change?
1. Burning paper
2. Nuclear decay
3. Mixing salt in water
4. Dissolving sugar in water CORRECT ANSWER!
Q 10: Which metal is light enough to float on water?
1. Beryllium
2. Potassium CORRECT ANSWER!
3. Magnesium
4. Titanium
Q 11: Which of these elements sometimes is considered a nonmetal and other times considered a metal, primarily depending on its state?
1. Hydrogen CORRECT ANSWER!
2. Helium
3. Mercury
4. Iodine
Q 12: Atomic weight or atomic mass is based on the mass of an element's:
1. Protons
2. Neutrons
3. Protons and neutrons CORRECT ANSWER!
4. Protons and electrons
Q 13: The element symbol Au comes from the element name 'aurum', which is more commonly known as:
1. Sulphur
2. Lead
3. Tin
4. Gold CORRECT ANSWER!
Q 14: A solid has:
1. A definite volume, but not a defined shape.
2. A definite shape, but not a defined volume.
3. A definite volume and shape. CORRECT ANSWER!
4. No defined volume or shape.
Q 15: You would be most likely to increase the rate of a chemical reaction by:
1. Increasing the concentration of products.
2. Decreasing concentration of reactants.
3. Decreasing temperature
4. Increasing temperature.CORRECT ANSWER!
Q 16: A catalyst may increase the rate of a chemical reaction. Catalysts work by:
1. Increasing the activation energy of a reaction.
2. Decreasing the activation energy of the reaction. CORRECT ANSWER!
3. Becoming a part of the reaction product.
4. Increasing the temperature of the reaction.
Q 17: An atom with more electrons than protons is called:
1. A molecule
2. An isotope
3. An anion CORRECT ANSWER!
4. A cation
Q 18: Amino acids may join together to form:
1. DNA
2. Lipids
3. Carbohydrates
4. Protein CORRECT ANSWER!
Q 19: The First Law of Thermodynamics is also known as:
1. Dalton's Law
2. Entropy
3. Law of Conservation of Mass
4. Law of Conservation of Energy CORRECT ANSWER!
Q 20: Approximately how many particles are in a mole of a substance?
1. 6.02 x 1023 CORRECT ANSWER!
2. 6.02 x 1019
3.3 x 108
4. 1.602 x 10-19
