Additional Science 0.0 / 5 ? ScienceMixedGCSEOCR Created by: fatimahobareyCreated on: 02-04-17 17:14 C3: What will react faster, powdered reactant or a lump of reactant? Powdered Reactant 1 of 23 C3: What is the formula for Sulfuric Acid? H₂SO₄ 2 of 23 C3: How many elements are in sodium hydrogen carbonate, NaHCO3? There are 4 elements 3 of 23 C3: What factors affect the costs of developing and synthesising drugs? Labour Costs, Energy Costs and Research 4 of 23 C3: What is the effect of the rate of a reaction if the reactants surface area is increased? The particles collide with a greater frequency 5 of 23 C3: In chemical reactions, what are reactants turned into? Products 6 of 23 C3: What does the displayed molecular formula show? It shows the numbers and types of atom in a molecule and it shows the bonds in a molecule 7 of 23 C4: Is distillation a viable method of purifying water? It is a colossal waste of industry and distillation could be a viable method on a small scale 8 of 23 C4: What is the other half of the ionic equation ( Cu2+ + 2 OH-) Cu(OH)₂ 9 of 23 C4: What is the defining property of metals? They are Strong and Malleable 10 of 23 C4: What is the element 'Gold' useful for? Gold is an element that is very useful for low reactivity because of it's high attractiveness 11 of 23 C4: What group are transition metals found in? Between Groups 2 & 3 12 of 23 C4: Finish the Equation for Thermal Decomposition - (MnCOз →) MnCOз → MnO + CO₂ 13 of 23 C4: What is the other half of the ionic equation ( Fe3+ + 3OH- →) Fe3+ + 3OH- → Fe(OH)з 14 of 23 C4: What are metals best described as? Metals are best described as a regular arrangement of positive ions surrounded by a sea of delocalised electrons. 15 of 23 C4: How do lead compounds enter the water supply? Water can contain lead compounds. These enter the water supply by old pipes that leach lead into the water. 16 of 23 C4: Why is iron a good metal to build a bridge with? It is a strong and cheap metal, it is good because a lot of metal is needed and the bridge needs a metal that is able to support a lot of weight. 17 of 23 B3: Why do identical twins look the same? Identical twins look the same because they have the same genetic information 18 of 23 B3: What are Genes? Genes are sections of very long DNA molecules that make up chromosomes in the nuclei of cells 19 of 23 B3: When does fertilisation occur? Fertilisation occurs when two gametes fuse to form a zygote 20 of 23 B3: What determines an organisms characteristics? Genes 21 of 23 B3: Watson and Crick built a model of DNA. What did they research and show to prove that DNA does exist? They researched and showed that bases occurred in pairs and (using an x-ray) they proved that two strands were tightly wound together 22 of 23 B3: What information do genes contain? Genes contain information which control all organisms functions, including protein production and a way in which an organism develops 23 of 23
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