Study of the first element – Hydrogen. Answer the following questions:- 1. Give a reason why hydrogen can be placed in group 1[IA] and group 17[vIIA] of the periodic table. 2. What similarities does it show with group 1[IA] and group 17[VIIA]. With special reference to valency electrons and ion formaton and examples. 3. How does hydrogen occur in the free and combined state? 4. Which metals react with cold‚steam and boiling water to form their respected oxides and hydroxides ? Give examples and
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normal delta rocket except it will be covered in solar panels. It will have a tank of water and a giant battery and a tube running from that tank to the fuel container. There it will be burnt into fuel and we will collect the water and perform electrolysis again. once it lands‚ it will unfold into a house-like building that humans will live in for a few months. 4. Explain the data you will want to collect on your mission‚ and list the instruments you’ll need so that you can collect and store samples
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IMPORTANT TOPICS OF CHEMISTRY 2009 Chap No.1 Q.1- Define chemistry & branches of chemistry any three? Q.2-Lrean about history of chemistry for short question and fill in the blanks? Q.3 what is scientific method? Define hypothesis and theory? CHAP NO.2 Q.1-Learns about any three laws of chemical combination only statement and example? Q.2-Define chemical reaction and types of chemical reaction with one example for each with the help of chemical equation? Q.3-Define MOLE‚ Atomic no
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hydrochloric acid solution Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid slowly and observe the reaction. Next‚ place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. 4. Electrolysis of water Use a U-tube with electrodes at each end‚ connected to a battery. Fill the U-tube with water. Turning on the battery‚ observe the results at each electrode. Next‚ test for hydrogen and oxygen gas produced at each end of the tube.
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UNIT 5 – ELECTROCHEMISTRY Chapter 9 – Electric Cells 9.1 – Oxidation and Reduction * The term reduction came to be associated with producing metals from their compounds. * Ex. Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2 * Another substance‚ called a reducing agent causes or promotes the reduction of a metal compound to an elemental metal. In this example‚ it is CO. * Corrosion‚ including the rusting of metals‚ is now understood
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Smooth skin‚ sans hair‚ is essential for days at the beach or the shorts you wear the rest of the summer. Many people get by with waxing‚ shaving and electrolysis‚ but these methods need to be constantly repeated if you want to have gorgeous skin all summer. Laser hair removal permanently reduces the hair anywhere on your body‚ except around the eyes. However‚ it may take a few sessions to become hair-free‚ which is why it’s recommended to start the treatments in the fall or winter. Laser hair
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strike the enemy! Submarine batteries are nothing but electrochemical cells! That’s why electrochemistry is so important and everyone should try it!! 6 Inside a space craft: How do people get oxygen inside a space craft? 7 Electrolysis is an important aspect of electrochemistry! 8 So there are plenty of reasons why we should learn electrochemistry! From submarines to space crafts to our daily life‚ electrochemistry is involved in many forms! We would study the following
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Magnesium metal and hydrochloric acid solution 10. Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid slowly and observe the reaction. Next‚ place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. 11. 12. 13. Electrolysis of water 14. Use a Utube with electrodes at each end‚ connected to a battery. Fill the Utube with water. Turning on the battery‚ observe the results at each electrode. Next‚ test for hydrogen and oxygen gas produced at each end of the tube
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in Sports Drinks Drinks are full of many substances that make up the taste‚ color‚ and uses of the beverages. One very important part of a sports drink are electrolytes. An electrolyte is a liquid gel that contains ions and can be decomposed by electrolysis‚ it is present in a battery. This substance is in many of the everyday drinks we use. From the orange juice we drink in the morning to the many sports drinks we use when we exercise. What do these electrolytes do to help us in our active everyday
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Hong Kong Diploma of Secondary Education Examination Integrated Science School-based Assessment Sample Tasks Teachers may use the sample tasks for non-profit making educational and research purposes with proper acknowledgement. © 2009 Hong Kong Examinations and Assessment Authority All Rights Reserved 2009 TABLE OF CONTENT Task C1 C2 C4 C5 C6 C7 C8 E3 Title Osmosis in Living Tissue Catalytic Activity of Enzyme Action of Electricity on Substances Encountered in Daily Life Do
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