Tutor Sigma Academy

Associated for 1 Year 8 Months
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Tutorsigma offers multiple packages, catering to the needs of IIT JEE/CET/SAT/CBSE aspirants across the world. We at Tutorsigma understand the requirement of students thus the packages are designed keeping the needs into consideration.


Mathematics, Physics, Chemistry, Biology, KVPY Exam, IIT JEE Mains, CET, BITSAT, IIT JEE Advanced, AIPMT, Medical Entrance Exams, NEET, SAT, Study in USA, ACT Exam, PSAT, Science, All Subjects, NTSE


  • Having a classroom centre which can accommodate more than 70+ students at one time.
  • Having a competitive & academic library
  • Proper setup for online teaching.
  • Having well-expereinced teachers.


Dr. Anita Gupta( M.Sc, PhD in Chemistry): Having more than 8+ years of teaching Academic/IIJEE/medical to students 

Mr. Shiv Shankar Gupta(Masters from IIT Roorkee)

Segment & Subject Details:
Class 9 - 10 Mathematics Mathematics Physics Physics Chemistry Chemistry Biology Biology
Class 11 - 12 Mathematics Mathematics Physics Physics Chemistry Chemistry KVPY Exam KVPY Exam
Engineering Entrance & IITJEE IIT JEE Mains IIT JEE Mains CET CET BITSAT BITSAT IIT JEE Advanced IIT JEE Advanced
Engineering Subjects Mathematics Mathematics
Medical Entrance & AIPMT Chemistry Chemistry AIPMT AIPMT Medical Entrance Exams Medical Entrance Exams NEET NEET
Study Abroad SAT SAT Study in USA Study in USA ACT Exam ACT Exam PSAT PSAT
Class 6 - 8 Chemistry Chemistry Science Science All Subjects All Subjects NTSE NTSE
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10 Local classes available

1 Note written by me

  • Chemical Bonding & Molecular Structures

    File(s) contain : 1

    11 times downloaded

    Describe Key Points of 11th Grade chapter "Chemical Bonding & Molecular Structures".

  • Question: Is fog an example for an SOL?

    Posted in: Chemistry | Date: 30/07/2019


    Hey Anmol,

    No, fog is not an example of sol.

    A liquid dispersed in a gas is referred to as a fog. 

    Every colloid consists of two parts: colloidal particles and the dispersing medium. The dispersing medium is the substance in which the colloidal particles are distributed.


  • Question: What is the oxidation number of Fe in Fe3O4?

    Posted in: Chemistry | Date: 30/07/2019


    Hi Shubham,

    Fe₃O₄ let the oxidation number of Fe is x  then, 3x + 4(-2) = 0     x = + 8/3   hence, the average oxidation number of Fe is +8/3, but stoichiometrically, Fe₃O₄ is an equimolar mixture of FeO and Fe₂O₃.                   The oxidation number of Fe in FeO is +2  and the oxidation number of Fe in Fe₂O₃ is +3  then, 2x + x = +6 + 2 = +8 ⇒ x = +8/3

    Hope this answer helps you.

  • Answer:

    Hi Sathya,


    Since gas is highly compressible, thus increase in pressure increases the number of gaseous particle per volume.

    The solubility of gas keeps increasing with increasing in pressure until a new dynamic equilibrium reached.

    Henry’s Law:

    Henry’s Law states that at constant temperature the solubility of as gas in a liquid is directly proportional to the pressure of the gas.

    Its Applications:

    Volume of O2 dissolve will be same at a given temperature.Solubility of gases increase with decrease of temperature so aquatic life is more comfortable at cold water.

    Thank you

  • Question: What are the components of bronze?

    Posted in: Chemistry | Date: 30/07/2019


    Hi Karthikeyan,

    Bronze is an alloy made of copper and another metal, usually tin. Compositions vary, but most modern bronze is 88% copper and 12% tin. Bronze may also contain manganese, aluminum, nickel, phosphorus, silicon, arsenic, or zinc.

    Hope it help you.

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