ICSE Class X Chapter 5 Hydrogen Chloride and Hydrochloric Acid Hydrogen chloride (HCl) : Formula : HCl Nature : Covalent. Molecular Mass : 36·5u [i.e. HCl = 1 + 35·5 = 36·5] Occurrence : (i) Present in gastric juices. (ii) Present in volcanic gases. Laboratory preparation of HCl gas : Hydrogen chloride gas is prepared in laboratory by heating conc. H2SO4 with NaCl. NaCl + H2SO4 Heat → NaCl + NaHSO4 Heat → NaHSO4 + HCl Sodium hydrogen sulphate Na2SO4 + HCl
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then when it is placed in a insoluble solution the DNA can eventually be isolated. DNA is deoxyribonucleic acid. Its a self replacing material present in all living organisms as the main constituent of chromosomes. It is the fundamental and distinctive characteristics of someone or something‚ especially when regarded as unchangeable. DNA extraction is the removal of deoxyribonucleic acid from the cells or viruses in which it normally resides‚ it is useful to biologists. One technique for extracting
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Acid in the human stomach When people refer to acid they usually see it as a corrosive liquid that can dissolve metals or change the color of a substance. So they think of acid as a dangerous matter for the body and believe it can easily dissolve your skin. What I have previously listed are indeed properties of certain acids‚ such as Hydrofluoric Acid which can cause irreversible tissue damage if it comes in contact with skin‚ but not all acids are this strong. As a matter of fact what a lot of
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Flowers and Acid Call them freaks‚ the underground‚ the counterculture‚ flower children‚ or just simply hippies‚ they are all loose labels for the youth culture of the 60’s that transformed life in the West as we knew it‚ introducing the spirit of freedom‚ of hope‚ of happiness‚ of change‚ and of revolution (Miles 9). The years that made up the 1960’s were some of the most exciting and turbulent years in American history. The post World War II baby boomers grew up. A president and
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linguistic system” (p. 76) and then output as posted or reply tweets. Consequently‚ the research is obviously not presented in terms of situated learning and language learner participation in a Community of Practice. However‚ the author does draw conclusions about how the use of Twitter led to the development of community among the students and the other participants involved in the study and how she believed that classroom dynamics were affected positively by Twitter use. The research questions were
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(Fe3+ ) form. Ferric form is not usually absorbed in the body. In the stomach‚ there is low pH of 2 due to presence of gastric acids such as Hydrochloric and Ascorbic acids. These acids provide an acidic environment for reduction of ferric iron to ferrous (Fe2+). Ferrous iron can be absorbed in the body system. As in following equation of iron (iii) reaction with Ascorbic acid ‚ the product is iron (ii) chloride which is soluble 2 Fe3+ (s) + C6 H8 O6 (aq) → 2 Fe2+ (aq) + C6 H6 O6 (aq) + 2 H (aq)+
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Singin’ In the Rain Review Singin’ In the Rain (1952) Genre: Comedy‚ Musical‚ Romance Cast Don Lockwood: Gene Kelly Cosmo Brown: Donald O’Connor Kathy Seldon: Debbie eynolds Lina Lamont: Jean Hagen R.F. Simpson: Millard Mitchell Zelda Zanders: Rita Moreno Roscoe Dexter: Douglas Fowley Singin’ in the Rain is one of the most-loved and celebrated film musicals of all time from MGM‚ before a mass exodus to filmed adaptations of Broadway plays emerged as a standard pattern. It was made
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adopting new technologies and are using feed acidifiers for supplementing the diets of animals. The market value of propionic acid as a feed acidifier was the highest in 2012‚ and is projected to grow with the increasing demand for feed acidifiers in the livestock industry. The benefits of feed acidifiers are leading the market demand in the feed industry. The fumaric acid market is comparatively small and is projected to grow at a CAGR of 5.8% from 2013 to 2018. The feed acidifiers market is projected
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and form new‚ abnormal cells. In addition‚ these cells can also invade other tissues. This is a property that normal cells do not possess. 3.Molecular pathology behind cancer Cancer cells originate from normal cells when their DNA (deoxyribonucleic acid) or blue prints within the cell nucleus is damaged. DNA is in every cell and it directs all the cell’s actions‚ growth‚ death‚ protein synthesis etc. When DNA is damaged in a normal cell‚ the cell either repairs the damage or the cell dies. In cancer
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term ( major‚ minor‚ and middle terms) can be represented by a circle. | | C. Since a syllogism is valid if and only if the premisses entail the conclusion‚ diagramming the premisses will reveal the logical geography of the conclusion in a valid syllogism. If the syllogism is invalid‚ then diagramming the premisses is insufficient to show the conclusion must follow. | | D. Since we have three classes‚ we expect to have three overlapping circles. | 1. The area in the denoted circle represents
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