PRACTICALS FOR SUMMATIVE ASSESSMEN-I : 1. To test (a) the presence of starch in the given food sample (b) the presence of the adulterant metanil yellow in dal. 2. To prepare a) a true solution of common salt, sugar and alum b) a suspension of soil, chalk powder and fine sand in water c) a colloidal of starch in water and egg albumin in water and distinguish between these on the basis of - transparency - filtration criterion - stability 3. To prepare a) a mixture b) a compound using iron filings and sulphur powder and distinguish between these on the basis of: i. appearance i.e., homogeneity and heterogeneity i. appearance i.e., homogeneity and heterogeneity ii. behaviour towards a magnet iii. behaviour towards carbon disulphide as a solvent. iv. effect of heat. 4. To carry out the following reactions and classify them as physical or chemical changes. a. Iron with copper sulphate solution in water. b. Burning of magnesium in air. c. Zinc with dilute sulphuric acid d. Heating of copper sulphate e. Sodium sulphate with barium chloride in the form of their solutions in water. 5. To prepare stained temporary mounts of (a) onion peel and (b) human cheek cells and to record observations and draw their labeled diagrams. 6. To identify parenchyma and sclerenchyma tissues in plants, striped muscle fibers and nerve cells in animals,from prepared slides and to draw their labeled diagrams. 7. To separate the components of a mixture of sand, common salt and ammonium chloride (or camphor) by sublimation. 8. To determine the melting point of ice and the boiling point of water. 9. To establish relationship between weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance. 10. To determine the mass percentage of water imbibed by raisins. CBSE Sample Papers Class 9 for Lab Skill SA1
9th Science Lab skil sa1 experiment-1 Download File 9th Science Lab skil sa1 experiment-2 Download File 9th Science Lab skil sa1 experiment-3 Download File 9th Science Lab skil sa1 experiment-4 Download File 9th Science Lab skil sa1 experiment-5 Download File 9th Science Lab skil sa1 experiment-6 Download File 9th Science Lab skil sa1 experiment-7 Download File 9th Science Lab skil sa1 experiment-8 Download File 9th Science Lab skil sa1 experiment-10 Download File Class9 Science Lab skil sa2 experiments Download Files
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