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Introduction to water- engineering chemistry
Around 72 % of an entire body is made up of water and 72 % are our organs all kinds of minerals the vitamins proteins etcetera water is a very important part of body if we do not have water our body will get dehydrated very easily and dehydration is something which leads to illness and sicknesses it leads to loss of energy very quickly. Water is used by living organisms such as human beings animals plants microbes insects etc. need water and where living systems are not involved for example machines for example water was used as a coolant before now we have other types of coolants for example we have air conditioners which help in cooling the computer machines etc but before that me used to put water and store the water at certain parts to make sure that a machine was cool.
£0.50 Preview RemovePlant Immunity
Notes from Year 3 Biochemistry lectures on Plant Immunity, covering Cell and molecular biology of plant-microbe interactions, focal immunity, surface immune recognition in plants, mechanisms of NLR-triggered plant immunity, effector-triggered susceptibility, and the molecular arms race between plants and pathogens.
£2.50 Preview Removeclass 11 chemistry notes
Making effective short notes involves a systematic approach. Begin by skimming the material to identify key points and headings. Use abbreviations, symbols, and keywords to condense information. Organize notes using bullet points or numbered lists.
£25.00 Preview RemoveIonic Bonds Notes
These easy to use, color coded, notes contain all the essential information for ionic bonding
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Full study notes for class 10th science chapter 1 chemistry reaction and Equations
£2.50 Preview RemoveGCSE Chemistry Triple Award General Notes
Handwritten in joined up writing. Scanned into computer. GCSE level. Ionic and Covalent Bonding
£0.60 Preview RemoveOCR 2024 GCSE Chemistry B (Twenty First Century Science) J258/01 Breadth in Chemistry (Foundation Tier) With Marking Scheme Merged
OCR 2024 GCSE Chemistry B (Twenty First Century Science) J258/01 Breadth in Chemistry (Foundation Tier) With Marking Scheme Merged CHEMISTRY B Oxford Cambridge and RSA Friday 17 May 2024 – Morning GCSE (9−1) Chemistry B (Twenty First Century Science) J258/01 Breadth in Chemistry (Foundation Tier) Time allowed: 1 hour 45 minutes You must have: F • a ruler (cm/mm) • the Data Sheet for GCSE (9–1) Chemistry B (inside this document) You can use: • an HB pencil • a scientific or graphical calculator * J 2 5 8 0 1 * Please write clearly in black ink. Do not write in the barcodes. Centre number First name(s) Last name INSTRUCTIONS Candidate number • Use black ink. You can use an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined page at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 90. • The marks for each question are shown in brackets [ ]. • This document has 28 pages. ADVICE • Read each question carefully before you start your answer. 2 1 Fuels such as diesel and petrol are made from hydrocarbons. (a) (i) Hydrocarbons are made from carbon and one other element. What is the other element? Put a ring around the correct option. Chlorine Hydrogen Nitrogen Oxygen [1] (ii) What is the main source of hydrocarbons? ..................................................................................................................................................... [1] (b) Alkanes are hydrocarbons. Which compound is an alkane? Tick (✓) one box. Butanoic acid Ethanol Methane Propene [1] (c) Alkenes are also hydrocarbons. They can be used to make polymers. Which statements about polymers are true and which are false? Tick (✓) one box in each row. True False All polymers are made from alkenes. Polymers are long chain molecules. Polymers can be synthetic or naturally occurring.
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