BIOLOGY (class-IX)   Chapter-1:          (THE FUNDAMENTAL UNIT OF LIFE)   Introduction The term cytology is concerned with the study of the structure of the cell and its organelles, whereas cell biology is concerned with the physiological and biochemical…

  The Resources on the Earth Major portion of the energy in India is generated from coal. It is estimated that India has around 120 billion tons of coal in reserve, enough to last for around 120 years. Huge reserves…

      CHEMISTRY (CLASS-X)   Chapter-3: (METALs& NON-METALS)   Element are classified into two basic categories, metals and non-metals. Before giving the definition of metal and non-metal, we must know some important terms: (i) Malleability: Ability of an element…

CHEMISTRY (CLASS-X) CHAPTER-2: (ACIDS, BASES& SALTS) We use a number of materials in our daily life, some of which are sweet, sour, bitter and salty in taste. Now it is very interesting to know that what substances are present in…

      CHEMISTRY (CLASS-X)   Chapter-1: (CHEMICAL REACTION AND EQUATIONS)   Chemistry is defined as that branch of science which deals with the composition and properties of matter and the changes that matter undergoes by various interactions. A chemical…

  Genetics Genetics is a branch of biology that deals with the study of heredity and variations. Heredity is the transmission of characters from parents to offspring. Offspring or siblings are the product of sexual reproduction and commonly biparental in…

  The production of new organisms from existing organisms of the same species is known as reproduction. Reproduction is essential for successful perpetuation of species in nature. Reproducing organisms create new individuals that look very similar much like themselves. Organisms…

    CHEMISTRY (CLASS-IX)                                  Chapter- 4 Carbon and Its Compounds   Carbon is a non-metallic element. Chemical symbol : C Symbolic Representation : Where, atomic number is 6 and atomic mass is 12 Therefore, it has Number of protons…

    CHEMISTRY (CLASS-IX)                                  Chapter-3                         Atoms and Molecules   Matter is called ‘PADARTH’ that cannot be divided further. The combined form of atoms is called ‘molecules’. Different kinds of atoms and molecules have different properties.As we know that sugar,…

    CHEMISTRY (CLASS-IX) Chapter-2:         (IsMatter Around Us Pure)   All the matter around us is not pure, in fact, matter around us is of two types:     1.1       PURE SUBSTANCES A pure substance is one which is made…