Class 10 Science                                                         Chapter 1 Chemical reactions and equations                                           (All reactions and their description)                                          Total – 21 Chemical reactions 2Mg   +   O2 –>   2MgO MgO  – magnesium oxide (white ash product )(Basic in nature) Combination Reaction – CaO     +   H2O –> Ca(OH)2  + heat Here CaO…

                                                                                               Class 9 Science                                                               Chapter – 3 Atoms and Molecules (1) The formula of Ammonium Sulphate is —————– (a) NH4SO4   (b) NH4SO2   (c) (NH4)2SO4   (d) NH2SO4         (2) Percentage of calcium in calcium carbonate – (a) 40    (b) 30    (c) 48    (d) 36 (3) The atomic symbol of Iron is…

                                                                                               Class 9 Science                                                               Chapter – 4 Structure of Atoms (1) Atomic number (Z) is equal to ————– (a) Number of protons in the nucleus of an atom.    (b) Number of electrons in a neutral atom (c) Both (a) and (b)        (d) None of the above (2) Two atoms…

CHAPTER 3  METALS AND NON-METALS. METALS –               Metals are the substances which are electropositive in nature is, they have a tendency to lose electrons. All metals except mercury exist as solids room temperature. About 118 elements are known today. There than 90 metals, 22 non-metals and a few metalloids.…

Exam analysis – According to the students, Paper was moderate and mostly similar as sample paper which cbse has provided. Students were looking happy with the level of paper. here is the set 3/2/2 Another set is available, Set 3/2/1

CHAPTER-2 ACIDS, BASES AND SALTS →Acids are sour and change the color of blue litmus to red. →Bases are bitter and change the colour of the red litmus to blue. •Natural indicators of acid-base. →Litmus, turmeric, synthetic indicators methyl orange and phenolphthalein. •Litmus solution is a dye, which is extorted…

                                                                 Class 9 Chapter 6                                                                        Tissues Tissues are groups of cells with similar structures and functions that work together to perform specific functions within an organism. Tissues are the building blocks of organs, which are further organized into organ systems to enable the overall functioning of complex multicellular organisms.…

CHAPTER-6 LIFE PROCESS LIFE PROCESSES- The processes which, together perform the maintenance job are called life processes. Some processes are- A) Nutrition B) Respiration C) Transportation D) Excretion A process to transfer source of energy from outside the body of the organism, which we call food to the inside, process…

                                                                                     CLASS 10                                                                       How do organisms reproduce Reproduction – Reproduction is the biological process by which living organisms produce new individuals of the same species, ensuring the continuation of their species over generations. It serves several important purposes: Survival of the Species: Reproduction is necessary for the survival of…

                                                             Class – 10                                                          Science Chapter – 8                                                        Heredity and Evolution Heredity –                  The transmission of features /characters /and traits from one generation to the next generation. Variation –                    The difference among the individuals of a species /population are called variation. It…