“The Knowledge Library”

Knowledge for All, without Barriers…

An Initiative by: Kausik Chakraborty.
04/02/2023 2:42 PM

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Chemistry

Chemical Processes

Process Definition Usage Electrolysis It is a process in which electric current is passed through a substance to effect a chemical change. Electroplating, Production of

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Inorganic Acids

Important Inorganic Acids Name Formula Common Use Also remember Hydrochloric acid HCl Pickling of steel Gastric acid secreted by stomach mainly contains HCl. Nitric acid

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Organic Acids

Important Organic Acids Name Chiefly found in Formula Lactic acid Sour milk C2H4OHCOOH Acetic acid Vinegar CH3COOH Formic acid (Methanoic acid) Ant venom HCO2H Citric

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Alloys & Ores of Metals

Alloy Combination of Duralumin Aluminium and Copper Brass Copper and Zinc Bronze Copper and Tin Invar Iron and Nickel Stainless steel Iron, Chromium and Nickel

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Facts: Metal

Fact to Remember Name of the Metal The metal with the highest melting point Tungsten The metal with the highest thermal conductivity Silver The metal

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Facts: Gases

Fact to Remember Name of the Gas Gas most abundant in earth’s atmosphere Nitrogen (78%) Percentage of oxygen in earth’s atmosphere 21% (appx) The lightest

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Facts: Periodic Table

The Periodic Table was created by Dmitry Mendeleyev, a Russian chemist and professor in 1869. The Periodic Table has seven rows or periods. The present Periodic Table has

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Facts: Elements

An element is defined by the IUPAC as a pure chemical substance composed of atoms with the same number of protons in the atomic nucleus.

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What is Diffusion?

The diffusion process results in a uniform distribution of particles. Diffusion is the process in which atoms or molecules move from a region of high

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What is an Isotope?

Example of hydrogen isotopes with different numbers of neutrons. Isotopes are atoms of the same element that have an equal number of protons but different

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Plastics

About Plastics The word, plastic, was derived from the word ‘Plastikos’ meaning ‘to mould’ in Greek. Fossil fuels have compounds containing hydrogen and carbon (hydrocarbon) which act as building blocks

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Gasoline

It is difficult to get an exact weight of gasoline due to the many additives added. What is Gasoline? Gasoline, also known as petrol in

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Benzene

Benzene (C6H6) is classed as a hydrocarbon as it contains only carbon (C) and hydrogen (H). Benzene is a liquid chemical that has a characteristic

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What is Chromatography?

It’s a way to divide a mixture into its separate components. There are a few different types of chromatography—gas, liquid, thin-layer, and paper, to name a few.

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PH Value

▪️ जल का pH मान कितना होता है = 7 ▪️ दूध का PH मान कितना होता है = 6.4 ▪️ सिरके का PH कितना

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रसायन सूत्र

1. आक्सीजन—O₂ 2. नाइट्रोजन—N₂ 3. हाइड्रोजन—H₂ 4. कार्बन डाइऑक्साइड—CO₂ 5. कार्बन मोनोआक्साइड—CO 6. सल्फर डाइऑक्साइड—SO₂ 7. नाइट्रोजन डाइऑक्साइड—NO₂ 8. नाइट्रोजन मोनोऑक्साइड (नाइट्रिक ऑक्साइड) — NO

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महत्वपूर्ण फॉर्मूले एवं जानकारियां

1.आक्सीजन—o₂ नाइट्रोजन—n₂ हाइड्रोजन—h₂ कार्बन डाइऑक्साइड—co₂ कार्बन मोनोआक्साइड—co सल्फर डाइऑक्साइड—so₂ नाइट्रोजन डाइऑक्साइड—no₂ नाइट्रोजन मोनोऑक्साइड (नाइट्रिक ऑक्साइड) — no डाईनाइट्रोजन ऑक्साइड (नाइट्रस ऑक्साइड) — n₂o क्लोरीन —

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Atom and Molecules

Atom: ☺ Atom is the smallest possible particle of the element that takes part in any chemical reaction but doesn’t exist in a free state in

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Common Names of Chemical Compounds

Common Names of Chemical Compounds 🔹 Baking Powder➖Sodium Bicarbonate 🔹 Blue Vitriol➖Copper Sulphate 🔹 Bleaching Powder➖Calcium Oxychloride 🔹 Chloroform➖Trichloro Methane 🔹 Chalk (Marble)➖Calcium Carbonate 🔹

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