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  2. Octachloropropane - Wikipedia

    en.wikipedia.org/wiki/Octachloropropane

    Octachloropropane or perchloropropane is the chemical compound with elemental formula C 3 Cl 8 and structural formula Cl 3 C−CCl 2 −CCl 3.Its molecule has a simple chain of three carbon atoms connected by single bonds, with chlorine atoms filling their remaining bonds.

  3. National Council of Educational Research and Training

    en.wikipedia.org/wiki/National_Council_of...

    The National Science Talent Search Scheme (NTSS) underwent a major change in the year 1976 with the introduction of the 10+2+3 pattern of education. The program was renamed to National Talent Search Scheme with the NTSE examination now being conducted for classes X, XI, and XII.

  4. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.

  5. National Capital Region Transport Corporation - Wikipedia

    en.wikipedia.org/wiki/National_Capital_Region...

    The National Capital Region Transport Corporation (NCRTC) is a joint venture company of the Government of India and the states of Haryana, Rajasthan, Uttar Pradesh, and Delhi. The NCRTC is the owner of RapidX , the Regional Rapid Transit System (RRTS) project across the National Capital Region (NCR), inaugurated on 20 October 2023. [ 4 ]

  6. Extraction (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Extraction_(chemistry)

    Extraction in chemistry is a separation process consisting of the separation of a substance from a matrix. The distribution of a solute between two phases is an equilibrium condition described by partition theory. This is based on exactly how the analyte moves from the initial solvent into the extracting solvent.

  7. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    How do the spin–orbit coupling, other relativistic corrections, and inter-electron effects modify the chemistry of the trans-actinides? [1] [2] Is it possible to create a practically-useful lithium–air battery? [3]

  8. Concentration - Wikipedia

    en.wikipedia.org/wiki/Concentration

    The solutions on the left are more dilute, compared to the more concentrated solutions on the right. Often in informal, non-technical language, concentration is described in a qualitative way, through the use of adjectives such as "dilute" for solutions of relatively low concentration and "concentrated" for solutions of relatively high ...

  9. Equivalent concentration - Wikipedia

    en.wikipedia.org/wiki/Equivalent_concentration

    There are three common types of chemical reaction where normality is used as a measure of reactive species in solution: In acid-base chemistry, normality is used to express the concentration of hydronium ions (H 3 O +) or hydroxide ions (OH −) in a solution. Here, ⁠ 1 / f eq ⁠ is an integer value. Each solute can produce one or more ...