list of some organic Acids in pdf in pdf. It included Citric acid, Maieic acid, Tartric acid, Acetic acid, Lactic acid, Hydrochloric acid' Oxlic acid. for competitive job exam like ssc, psc, wbps, railway, esic, lic, bank and other competitive exam.
Natural Sources of Acids

Acids
Acids are the substance which have sour taste and turns blue litmus red. These are the substance which gives H+ ions in their aqueous solution e.g, HCI. In aqueous solution these are good conductor of electricity.Generally most of acids contain hydrogen. Pickles are always kept in glass jar because acid present in them reacts with the metal of metallic pot.The acids are ion of hydrogen,H+ that contain replaceable hydrogen atoms.This is a hydrogen atom that has lost its one and only electron.The moment we hear the term “Acid”, something scary, or something that would burn the surfaces, is what pops up in our mind. That’s kind of true. Because acids are known to create a burning effect of whatever comes in contact with them. They can erode the surfaces, or burn the skin when they come in contact with it. The Word“Acid” comes from the Latin word “Acidus ” which simply means sour. All acids are Sour to taste. The intensity of sourness may vary in different acids. But the overall taste of acids is always sour. The best examples of substances that contain acids include citrus fruits like orange, lemon, lime ,grapes and Tamarind etc . When we mix acid and base together, get chemical reaction and we get salt and water. So, an acid with a base gives us salt and water .

Natural Sources of some important Acids
Acids Natural source
Acetic acid vinegar
Citric acid Lemon,orange, grapes
Hydrochloric acid Stomach
Lactic acid Milk
Maleic acid Unripe apple
Oxlaic acid Tomato
Tartaric acid Tamarind
formic acid Ants
Uric acid Human Urine and Nitrogenos waste of bird

Properties of Acids
* Every acid taste is always sour.
* Acids converts blue litmus paper into red.
* Each acid is water soluble.
* Acid makes salt and water after chemical reaction with base.(HCL+HaOH=Nacl+H2O)
* Most of acids make carbon-di-oxide gas, chemical reaction with metal's carbonate. (CaCO3+2HCL=CaCl2 +H2O+CO2).
* All acids produce Hydrogen ions when dissolved in water (HCl=H++Cl- ).
Importance of acid in human body
Acids are also very important in biochemistry. Many biological processes are sensitive to the pH of the surroundings, so controlling acidity in the body is crucial. Some biologically important molecules like amino acids have dual personalities. They're said to be amphoteric, which means that they can act as both acids and bases. An amino acid has a carboxylic acid group that can produce hydrogen ions and an amino group that can accept hydrogen ions. Acids are all around us and can vary greatly in terms of their use and their nature.
Important G.k Questions and Answers on Acids
Q.1 Which Acid present in Lemon?
Ans: Citric Acid.
Q.2 Why Tamarind taste's sour?
Ans: Because presence of Tartaric Acid.
Q.3 Which Acid present in Orange?
Ans:Citric acid.
Q.4 Which Acid present in grapes?
Ans:Citric acid.
Q.5 The acid present in vinegar?
Ans:Acetic acid.
Q.6 The Acid present in Human Stomach is?
Ans: Hydrochloric acid.
Q.7 Which Acid present in milk?
Ans: Lactic acid.
Q.8 The Acid present in Unripe apple is?
Ans: Maleic acid.
Q.9 Which Acid present in Tomato?
Ans: Oxlaic acid.
Q.10 The Acid present in some Ants Is?
Ans: formic acid.



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