Surname Centre No. Initial(s) Signature Candidate No. Paper Reference(s) 4335/1F Examiner’s use only London Examinations IGCSE Team Leader’s use only Chemistry Paper 1F Foundation Tier Monday 9 May 2005 – Morning Time: 1 hour 30 minutes Materials required for examination Nil Items included with question papers Nil Question Leave Number Blank 1 2 3 4 5 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number and candidate
Premium Carbon dioxide Sulfuric acid Ammonia
Plexiglass™‚ and Mylar™ are all examples of commercially available synthetic polymers. Polymers are made up of smaller repeating units‚ called monomers‚ which are linked together by covalent bonds. The polymerization processes by which polymers are synthesized fall into two categories. Addition polymers are formed by addition reactions that link together monomers containing multiple bonds. One example of this process is the polymerization of styrene to form polystyrene. styrene HC styrene
Premium Polymer
DESIGN CANVAS 2.1 General Design canvas is of five types. Each type may be in varying numbers depending on the case under research. Empathy summary in describe the top 5 problem on the basis of desirability‚ feasibility & viability‚ and finally choose exact problem from five possibilities. The Ideation Canvas helps in carving out different requirement in-line with attempting/ looking forward to have an idea about addressing a problem. The product must be performing certain functions and have set
Premium Psychology Personality psychology Big Five personality traits
Macromolecule Report Monomer units of biological macromolecules have heads and tails. When they polymerize in a head-to-tail fashion‚ the resulting polymers also have heads and tails. These macromolecules are polar because they are formed by head to tail condensation of polar monomers. Making Glucose: Green plants manufacture glucose through a process that requires light‚ known as photosynthesis. This process takes place in the leaf chloroplasts. Carbon dioxide and water molecules enter a sequence
Premium DNA
the three conventional biopolymers (nucleic acids‚ lipids‚ proteins and carbohydrates)‚ as well as non-polymeric molecules with large molecular mass such as lipids and macrocycles. The individual constituent molecules of macromolecules are called monomers(mono=single‚ meros=part). Usage The term macromolecule was coined by Nobel laureate Hermann Staudinger in the 1920s‚ although his first relevant publication on this field only mentions high molecular compounds (in excess of 1‚000 atoms).At that
Premium Polymer Molecule
Which of the following types of molecules are the major structural components of the cell membrane? A) phospholipids and cellulose B) nucleic acids and proteins C) phospholipids and proteins D) proteins and cellulose E) glycoproteins and cholesterol For the following questions‚ match the labeled component of the cell membrane (Figure 7.1) with its description. [pic] Figure 7.1 5) peripheral protein 6) cholesterol 9) glycolipid 11) The presence of cholesterol in
Free Protein
(Macromolecules) Carbohydrates composed mostly of carbon‚ hydrogen‚ and oxygen (1:2:1) organic molecule having two or more hydroxyl groups along with a carbonyl group sugars may be aldoses or keytoses (depending on the location of the carbonyl group) monomer: monosaccarides – simple sugars (glucose‚
Free Protein DNA Cell
CHAPTER 9 : MANUFACTURED SUBSTANCES IN INDUSTRY NAME: NUR INSYIRAH BTE. AB HAMED CLASS: 4 SAINS GUNAAN (SG) SCHOOL: SMK SERI INDAH CONTENT Content Introduction 9.1 Sulphuric acid 9.1.1 Properties of sulphuric acid 9.1.2 The uses of sulphuric acid 9.1.3 The industrial process in manufacture of sulphuric acid 9.1.4 Environmental pollution by sulphuric acid 9.2 Ammonia and its salt 9.2.1 Properties of ammonia 9.2.2 The uses of ammonia 9.2.3 The industrial process in manufacture of ammonia
Premium Sulfuric acid Ammonia Sulfur dioxide
apart and attach themselves to the ends of shorter polymers. Hydrolysis plays an important role in our lives and in the lives of every living thing on earth. Living organisms rely on digestion (hydrolysis) to convert food energy from polymers into monomers‚ which are easier for our cells to absorb. This study was conducted to show how polysaccharides are broken down by organisms to absorb nutrients through hydrolysis. We used different methods to show how different tests involving heat‚ acid‚ saliva
Premium Starch Carbohydrate Cellulose
establish the type of foams in terms rigidity or flexibility. THEORY Polyurethanes‚ also known as polycarbamates‚ belong to a larger class of compounds called polymers. Polymers are macromolecules made up of smaller‚ repeating units known as monomers. Generally‚ they consist of a primary long-chain backbone molecule with attached side groups. The preparation of polyurethanes is a process of polymerisation whereby a diisocyanate and a dihydroxyl compound react together. Polyurethanes by definition
Premium Polyurethane Functional group