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2. Negotiable instrument - Wikipedia

   en.wikipedia.org/wiki/Negotiable_instrument

   According to section 4 of India's Negotiable Instruments Act, 1881, "a Promissory Note is a writing (not being a bank note or currency note), containing an unconditional undertaking, signed by the maker to pay a certain sum of money only to or to the order of a certain person or the bearer of the instrument". [14]

3. Promissory note - Wikipedia

   en.wikipedia.org/wiki/Promissory_note

   A 1926 promissory note from the Imperial Bank of India, Rangoon, Burma for 20,000 rupees plus interest. A promissory note, sometimes referred to as a note payable, is a legal instrument (more particularly, a financing instrument and a debt instrument), in which one party (the maker or issuer) promises in writing to pay a determinate sum of money to the other (the payee), [1] subject to any ...

4. Chemistry - Wikipedia

   en.wikipedia.org/wiki/Chemistry

   Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

5. Negotiable Instruments Act, 1881 - Wikipedia

   en.wikipedia.org/wiki/Negotiable_Instruments_Act...

   According to Section 13 of the Negotiable Instruments Act, "A negotiable instrument means a promissory note, bill of exchange or cheque payable either to order or to bearer." [3] But in Section 1, it is also described the Local extent, Saving of usage relating to hundis, etc. and Commencement.

6. Physical change - Wikipedia

   en.wikipedia.org/wiki/Physical_change

   A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density. An example of a physical change is the process of tempering steel to form a knife blade.

7. Chemical reaction - Wikipedia

   en.wikipedia.org/wiki/Chemical_reaction

   Chemical reactions are determined by the laws of thermodynamics. Reactions can proceed by themselves if they are exergonic, that is if they release free energy. The associated free energy change of the reaction is composed of the changes of two different thermodynamic quantities, enthalpy and entropy: [17]

8. Glossary of chemistry terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_chemistry_terms

   Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

9. Exothermic reaction - Wikipedia

   en.wikipedia.org/wiki/Exothermic_reaction

   The enthalpy of a chemical system is essentially its energy. The enthalpy change ΔH for a reaction is equal to the heat q transferred out of (or into) a closed system at constant pressure without in- or output of electrical energy. Heat production or absorption in a chemical reaction is measured using calorimetry, e.g. with a bomb calorimeter.