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    W.B.C.S.

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    • W.B.C.S.
    • W.B.C.S. Prelims-Mains Postal

    You have 12 weeks remaining for the course

    CoursesW.B.C.S.W.B.C.S. Prelims-Mains Postal
    • Compulsory Bengali 5

      • Lecture1.1
        Letter writing 30 min
      • Lecture1.2
        Report writing 30 min
      • Lecture1.3
        Precies 30 min
      • Lecture1.4
        Composition 30 min
      • Lecture1.5
        Translation from English to Bengali 30 min
    • Compulsory English 5

      • Lecture2.1
        Letter writing 30 min
      • Lecture2.2
        Drafting of report 30 min
      • Lecture2.3
        Precies 30 min
      • Lecture2.4
        Composition 30 min
      • Lecture2.5
        Translation from Bengali to English 30 min
    • English 6

      English carries 25 marks in the Preliminary exam. This section must be give enough importance.

      • Lecture3.1
        Verb 30 min
      • Lecture3.2
        Preposition 30 min
      • Lecture3.3
        Parts of speech 30 min
      • Lecture3.4
        Tense 30 min
      • Lecture3.5
        Synonyms & Antonyms 30 min
      • Lecture3.6
        Vocabulary 30 min
    • Indian History 15

      • Lecture4.1
        Stone Age 30 min
      • Lecture4.2
        IVC 30 min
      • Lecture4.3
        Vedic Culture 30 min
      • Lecture4.4
        Protestant Religious Movements 30 min
      • Lecture4.5
        Pre-Mauryan 30 min
      • Lecture4.6
        Mauryan period 30 min
      • Lecture4.7
        Post-Mauryan 30 min
      • Lecture4.8
        The Guptas 30 min
      • Lecture4.9
        Regional dynasties 30 min
      • Lecture4.10
        Rise of Islam 30 min
      • Lecture4.11
        Delhi Sultanate 30 min
      • Lecture4.12
        Bahamoni & Vijaynagar Empire 30 min
      • Lecture4.13
        Iliyas Shahi & Hosen Shahi Dynasty 30 min
      • Lecture4.14
        The Mughals 30 min
      • Lecture4.15
        Later-Mughal Period 30 min
    • Indian National Movement 12

      • Lecture5.1
        Battle of Plassey 30 min
      • Lecture5.2
        The Great Revolt of 1857 30 min
      • Lecture5.3
        Tribal Movements 30 min
      • Lecture5.4
        Peasant Movements 30 min
      • Lecture5.5
        Drain of Wealth 30 min
      • Lecture5.6
        Socio-Religious Reforms and Movements 30 min
      • Lecture5.7
        National Congress 30 min
      • Lecture5.8
        Role of Gandhi 30 min
      • Lecture5.9
        Radical and Revolutionary Organizations 30 min
      • Lecture5.10
        role of Press and Media 30 min
      • Lecture5.11
        Important Acts 30 min
      • Lecture5.12
        Governor Generals and Viceroys 30 min
    • Polity & Economy 23

      • Lecture6.1
        Features Of Indian Constitution 30 min
      • Lecture6.2
        Background of the Indian Constitution 30 min
      • Lecture6.3
        Preamble 30 min
      • Lecture6.4
        Union & its Territories 30 min
      • Lecture6.5
        Citizenship 30 min
      • Lecture6.6
        Fundamental Rights 30 min
      • Lecture6.7
        DPSPs 30 min
      • Lecture6.8
        Fundamental Duties 30 min
      • Lecture6.9
        Part 5 30 min
      • Lecture6.10
        Part 6 30 min
      • Lecture6.11
        Part 9 30 min
      • Lecture6.12
        Part 9A 30 min
      • Lecture6.13
        Constitutional bodies 30 min
      • Lecture6.14
        Non-Constitutional bodies 30 min
      • Lecture6.15
        Economics- introduction 30 min
      • Lecture6.16
        Important concepts 30 min
      • Lecture6.17
        Features of Indian Economy 30 min
      • Lecture6.18
        Sectors- Agriculture, service, Industry 30 min
      • Lecture6.19
        Socio-Economic issues- Poverty, Unemployment etc. 30 min
      • Lecture6.20
        Poverty alleviation programs 30 min
      • Lecture6.21
        RBI and its role 30 min
      • Lecture6.22
        Indian Financial System 30 min
      • Lecture6.23
        Money 30 min
    • Geography 19

      This section comprises of Indian and West Bengal Geography. It, like other section carries 25 marks.

      • Lecture7.1
        Features of Indian Political Geography 30 min
      • Lecture7.2
        Physio graphic divisions 30 min
      • Lecture7.3
        Important mountains, Ranges and peaks 30 min
      • Lecture7.4
        Important rivers 30 min
      • Lecture7.5
        Climate 30 min
      • Lecture7.6
        Soil 30 min
      • Lecture7.7
        Crops 30 min
      • Lecture7.8
        Forests 30 min
      • Lecture7.9
        Wild life 30 min
      • Lecture7.10
        Mineral Resources 30 min
      • Lecture7.11
        Energy- Conventional and non-conventional power 30 min
      • Lecture7.12
        Agriculture 30 min
      • Lecture7.13
        Industries 30 min
      • Lecture7.14
        Transport 30 min
      • Lecture7.15
        Population 30 min
      • Lecture7.16
        Physical Geography of WB 30 min
      • Lecture7.17
        Economic Geography of WB 30 min
      • Lecture7.18
        Census Data of WB 30 min
      • Lecture7.19
        District wise Study of WB 30 min
    • General Science 37

      This section comprises of three different subjects- Physics, Chemistry and Biology. All together, carry 25 marks.

      • Lecture8.1
        Measurement 30 min
      • Lecture8.2
        Measurement 30 min
      • Lecture8.3
        Motion 30 min
      • Lecture8.4
        Work, Energy & Power 30 min
      • Lecture8.5
        Simple Machines 30 min
      • Lecture8.6
        Heat 30 min
      • Lecture8.7
        Waves 30 min
      • Lecture8.8
        Sound 30 min
      • Lecture8.9
        Light 30 min
      • Lecture8.10
        Electricity 30 min
      • Lecture8.11
        Nuclear Physics 30 min
      • Lecture8.12
        Matter 30 min
      • Lecture8.13
        Atom 30 min
      • Lecture8.14
        Radioactivity 30 min
      • Lecture8.15
        Elements and Periodic Table 30 min
      • Lecture8.16
        Chemical Bonding 30 min
      • Lecture8.17
        Chemical Reactions 30 min
      • Lecture8.18
        Metals and Non-Metals 30 min
      • Lecture8.19
        Carbon and Compounds 30 min
      • Lecture8.20
        Solution 30 min
      • Lecture8.21
        Acids, Bases and Salts 30 min
      • Lecture8.22
        Day to day use of Chemistry 30 min
      • Lecture8.23
        Cell- basic unit of life 30 min
      • Lecture8.24
        Bacteria 30 min
      • Lecture8.25
        Virus 30 min
      • Lecture8.26
        Fungi 30 min
      • Lecture8.27
        Nutrition 30 min
      • Lecture8.28
        Respiration 30 min
      • Lecture8.29
        Transportation 30 min
      • Lecture8.30
        Excretion 30 min
      • Lecture8.31
        Skeleton and muscles 30 min
      • Lecture8.32
        Nervous system 30 min
      • Lecture8.33
        Reproduction 30 min
      • Lecture8.34
        Hormones 30 min
      • Lecture8.35
        Heredity and Genetics 30 min
      • Lecture8.36
        Human Diseases 30 min
      • Lecture8.37
        Biotechnology 30 min
    • General Mental Ability 17

      This is the General Intelligence portion and carries 25 marks. It includes both verbal and non-verbal reasoning and little bit of tricky arithmetic.

      • Lecture9.1
        Alphabet 30 min
      • Lecture9.2
        Analogy 30 min
      • Lecture9.3
        Classification 30 min
      • Lecture9.4
        Coding and Decoding 30 min
      • Lecture9.5
        Series- Number, Letter, Alphabet 30 min
      • Lecture9.6
        Direction 30 min
      • Lecture9.7
        Blood Relation 30 min
      • Lecture9.8
        Sitting Arrangement 30 min
      • Lecture9.9
        Time and Distance 30 min
      • Lecture9.10
        Time and Calendar 30 min
      • Lecture9.11
        Venn Diagram 30 min
      • Lecture9.12
        Syllogism 30 min
      • Lecture9.13
        Simple and Compound Interest 30 min
      • Lecture9.14
        Ratio and Proportion 30 min
      • Lecture9.15
        Percentage 30 min
      • Lecture9.16
        Profit and Loss 30 min
      • Lecture9.17
        Probability 30 min
    • General Studies-I 2

      • Lecture10.1
        Indian History with special emphasis on National Movement 30 min
      • Lecture10.2
        Geography of India with special reference to West Bengal 30 min
    • General Studies-II 3

      • Lecture11.1
        Science and Scientific & Technological advancement 30 min
      • Lecture11.2
        Environment 30 min
      • Lecture11.3
        General Knowledge and Current Affairs 30 min
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        5 Comments

      1. Saptarshi Chatterjee
        November 25, 2017

        Hi team,

        I am really benefited of this course, getting study materials at regular intervals, & immense help & co-operation from the team members, special thanks to Mr. Somnath Chakraborty for taking care on an individual basis, study materials are prepared in a just manner & really helpful for us who are working & don’t get enough time to read main books thoroughly.

        Thanks & regards,
        SAPTARSHI

      2. Debarka Nandi
        February 8, 2018

        The content is really relevant and well maintained. Study materials are to the point and quite helpful for me. Looking forward for more great materials for mains examination as well. Special thanks to Mr. Somnath Chakraborty for helping and taking care of the postal course.

      3. Sridipa Banerjee
        February 10, 2018

        Zerosum is one of the best effective online course.It is very much useful to us. Study materials are too good.

      4. S M Muklesh
        February 10, 2018

        Zero Sum provides high quality and well organized study materials which are very useful to cope with the vast syllabus of WBCS in a short time.Online class from home is a new concept which is very effective for working person like us. Whenever needed I have spoken to course coordinator Somenath Chakraborty regarding the course.
        I am very much thankful to him for his cooperation.

      5. anupam mondal
        February 16, 2018

        ZERO SUM always provides high quality complied notes for both WBCS prelims and main exam. I am fortunate enough to be a part of zero sum…specially thanks to rudro sir, somnath da, ayan da and all other members of zero sum for guiding us in a proper way to achieve the dream goal….

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