front 1 What are all the metric measurements composed of? A. Metric prefix and a basic unit of measure B. A significand and a metric prefix C. A metric prefix and a coefficient D. A coefficient a d a significand | back 1 A. |
front 2 What is the most commonly used temperature scale in the scientific community? A. Fahrenheit B. Celsius and Centigrade C. Kelvin D. English temperature method | back 2 B. |
front 3 The nucleus of an atom contains or is made up of which of the following? A. Protons and electrons B. Protons only C. Protons and neutrons D. Neutrons and electrons | back 3 C. |
front 4 What is an atom that has a positive charge called A. A cathode B. A cation C. An anode D. An anion | back 4 B. |
front 5 In the periodic table, what are the rows called? A. Groups B. Moles C. Columns D. Periods | back 5 D. |
front 6 What is the atomic number? A. Number of neutrons B. Number of protons C. Number of electrons D. Number of isotopes | back 6 B. |
front 7 Which if the following describes the atomic mass? A. Mass of protons and electrons B. Mass of neutrons and electrons C. Average mass of that elements isotopes D. Number of moles in a solution | back 7 C. |
front 8 Chemical equations are written in which manner? A. Product - - > Reactants B. Reactants - - > Products C. Reactants - - > Reactants D. Products - - > Reactants | back 8 B. |
front 9 What is the charge on potassium in the compound KCI? A. - 1 B. +1 C. - 2 D. +2 | back 9 B. |
front 10 A catalyst is a substance that accelerates a reaction by which of the following? A. Adding energy to the overall reaction B. Increasing the amount of energy ended for the reaction to occur C. Finding an alternate pathway for a reaction that requires less energy D. Speeding up the overall reaction process | back 10 C. |
front 11 Percent concentration of a solution is expressed as which of the following? A. 100 parts per 100 dL B. Parts per 100 parts C. Parts of moles D. Moles per 100 parts | back 11 B. |
front 12 What will one liter of a one molar solution of any element contain? A. The atomic mass in grams of that element B. The atomic number in grams of that element C. The atomic mass in liters of that element D. The atomic number in liters of that element | back 12 A. |
front 13 Chemical bonding is the bonding if which of the following? A. One atom to another atom B. One mole to another mole C. A proton to an electron D. One cation to another cation | back 13 A. |
front 14 Which of the following describes an ionic bond? A. It shares electrons B. It does not share electrons C. It is sometimes called a covalent bond D. It is the strongest of all chemical binds | back 14 B. |
front 15 The reaction 2C2H6 + 7O2 —> 4CO2 + 6H2O has a ratio of 2 parts ethane (C2H6) and 7 parts oxygen (O2). How many parts of ethane (C 2 H 6 ) will be needed to react with 21 parts of oxygen? A. 3 parts of ethane (C 2 H 6 ) B. 6 parts if ethane (C 2 H 6 ) C. 9 parts if ethane (C 2 H 6 ) D. 14 parts of ethane (C 2 H 6 ) | back 15 B. |
front 16 What is the concentration of 58.5 g of NaC1 in 2 L of solution (atomic weights of each element are as follows: Na = 23 g/mol, C1 = 35.5 mol)? A. 0.5 NaC1 B. 0.75 mol NaC1 C. 1 mol NaC1 D. 2 mol NaC1 | back 16 A. |
front 17 In a redox reactions, which of the following describes reduction? A. It is the loss of electrons B. It is the gain of protons C. It is the loss of neutrons D. It is the gain of electrons | back 17 D. |
front 18 What are acids? A. Hydrogen acceptors B. Solution of high pH C. Hydrogen donors D. Amphoteric | back 18 C. |
front 19 What is a benefit of waters ability to make hydrogen bonds? A. Lack of cohesiveness B. Low surface tension C. Use as a nonpolar solvent D. High specific heat | back 19 D. |
front 20 What are bases or alkaline solutions? A. Hydrogen acceptors B. Solutions of low pH C. Hydrogen donors D. Amphoteric | back 20 A. |
front 21 Chemical reactions in living systems proceed along catabolic pathways, and there tends to be an increase in which of the following? A. Entropy B. Enthalpy C. Glucose D. Glycogen | back 21 A. |
front 22 What is a pH of 7? A. Acidic B. Basic C. Neutral D. Positive | back 22 C. |
front 23 Which is the correct way to write Iodine (I) with an atomic mass of 131? A. I131 B. I131 C. 131I D. 131I | back 23 C. |
front 24 What is the correct formula for magnesium? A. MgC12 B. MgC1 C. Mg2C1 D. Mg2C12 | back 24 A. |
front 25 What is the weakest of all the intermolecular forces? A. Dispersion B. Dipole interactions C. Hydrogen bonding D. Covalent bonding | back 25 A. |
front 26 Beta radiation is the emission of which of the following? A. Large numbers of helium ions B. An electron C. High energy electromagnetic radiation D. A product of the decomposition of a proton | back 26 B. |
front 27 Which of the following describes carbohydrates? A. They serve as fuel for the body B. They are present in the DNA but not in RNA C. They are the least abundant biomolecule D. They cannot be stored in the body | back 27 A. |
front 28 What are monosaccharides? A. The simplest form of carbohydrates B. The most complex for of carbohydrates C. One form of a very complex fat D. Artifical sweeteners such as saccharin | back 28 A. |
front 29 Disaccharides are the joining together of which of the following? A. Three to six monosaccharides B. Two monosaccharides C. A number of monosaccharides D. A fat and a monosaccharide | back 29 B. |
front 30 Glycolysis is one of the body's chemical pathways for which of the following? A. Manufacturing glycogen B. Building proteins C. Producing fat D. Metabolizing glucose | back 30 D. |
front 31 Amino acids are the building blocks for which of the following? A. Nucleic acids B. Carbohydrates C. Proteins D. Lipids | back 31 C. |
front 32 What is the union if two amino acids using a peptide bond called? A. A dipeptide B. A peptide C. A monopeptide D. A polypeptide | back 32 A. |
front 33 Which of the following describes lipids? A. They are a major source of fuel for the body immediately after a meal B. They are stored for a source of fuel after carbohydrate depletion C. They are comprised of glycerol and three fatty acids D. They are metabolized by a pathway called glycolysis | back 33 B. |
front 34 Which of the following describes DNA? A. It is made of two strands of a ribose sugar-phosphate chain B. It consists of one strand of deoxyribose sugar-phosphate chain C. It consists of one strand of a ribosome sugar-phosphate chain D. It is located solely in the mitochondria of the individual cell | back 34 B. |
front 35 Use of the periodic table allows prediction of which of the following? A. The properties of each of the elements B. The charge of polyatomic ions C. The number of isotopes in each element D. The potential for discovery of new elemens | back 35 A. |
front 36 How could water be boiled at room temperature? A. By lowering the pressure B. By increasing the pressure C. By decreasing the volume D. By raising the boiling point | back 36 A. |
front 37 What is a combustion reaction? A. It is endothermic B. It substitutes one element for another C. It always shares electrons D. It is a reaction that involves oxygen | back 37 D. |
front 38 What is KCI --> K + CI2 an example of? A. Synthesis B. Decomposition C. Single replacement D. Double replacement | back 38 B. |
front 39 Iodine and carbon dioxide undergo sublimation at room temperature and atmospheric pressure. What is this process? A. Changing from a gas to a liquid B. Changing from a liquid to a gas C. Changing from a solid to a liquid D. Changing from a solid to a gas | back 39 D. |
front 40 An experiment is performed to measure the temperature of boiling water at sea level. The actual boiling point is 104.6 C, 104.5 C, and 104.4 C. What term best describes this data? A. Accurate B. Precise C. Variable D. Equivalent | back 40 B. |