CBSE ADDA

Basic Guidelines for Excellence in Laboratory practices in SCIENCE (Class IX) For Laboratory Assistants EXPERIMENT No- 1-AIM- To verify the laws of reflection of sound EXPERIMENT No- 2-AIM- To determine the density of solid (denser than water) by using a spring balance and a measuring cylinder. EXPERIMENT No- 3-AIM- To establish the relation between the loss in weight of a solid when fully immersed in (a) tap water (b) strongly salty water, with the weight of water displaced by it by taking at least two different solids. EXPERIMENT No- 4-AIM- To observe and compare the pressure exerted by a solid iron cuboid on fine  and/ wheat flour while resting on its three different faces and to calculate the pressure exerted in the three different cases EXPERIMENT No- 5-AIM- To determine the velocity of a pulse propagated through a stretched string/slinky. EXPERIMENT No- 6-AIM- To study the characteristic of spirogyra/Agaricus, Moss/Fern, Pinus (either with male or female

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CLASS 12th  SAMPLE QUESTIONS  (2014) The Jharkhand Academic Council was established for holding and conducting examinations at the end of Intermediate, Education, Secondary Education, Sanskrit Education and Madrasa Education and for prescribing courses of studies for such examinations and for recommending for recognition of Intermediate Educational Institutions, High Schools, Sanskrit Schools and Madrasas to the State Government and for carrying out such other or duties assigned to the council by the State Govt from time to time. Jharkhand Academic Council_SAMPLE QUESTIONS 12th_chemistry_jharkhand_board.        Download File 12th_maths_jharkhand_board.rar       Download File 12th_physics_jharkhand_board.rar      Download File 12th_model_questions_paper_jharkhand_board_2014 Download File

1. To study the following properties of acetic acid (ethanoic acid) : i) odour ii) solubility in water iii) effect on litmus iv) reaction with sodium bicarbonate 2. To study saponification reaction for preparation of soap. 3. To study the comparative cleaning capacity of a sample of soap in soft and hard water. 4. To determine the focal length of i. Concave mirror and ii. Convex lens by obtaining the image of a distant object. 5. To trace the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, angle of refraction, angle of emergence and interpret the result. 6. To study (a) binary fission in Amoeba and (b) budding in yeast with the help of prepared slides. 7. To trace the path of the rays of light through a glass prism. 8. To draw the images of an object formed by a convex lens when placed at various positions. 9. To study homology and analogy with the help