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MAJOR EXPERIMENT (CLASS - XII - BIOLOGY) EXERCISES 1
(2) Materials Required: Card board box, torch, beaker, different samples of water. (3) Procedure: (1) Take a cardboard box and prepare a Tyndal set-up from it to test turbidity. (2) Tyndal set-up can be prepared by making a pencil size hole in the card board box and fixing a light source on the other side of the box.
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[CLASS XII CHEMISTRY PRACTICALS]
stjohnsschoolkota.edu.in(CHEMISTRY PRACTICALS) Page No 3 2. Basic Radical (a) Preliminary Test :- 1. 3 o 2 3 2 3 n NH 4 2 CO 2NaOH Na CO 2H O 2NH NH 3 + Red litmus ----- Litmus turns blue (b) Confirmative test :- 1. Nessler’s Test : K 2 HgI 4 o 2KI + Hg I 2 (Nessler’s Reagent) HgI 2 + NH 3 NH 2 HgI + HI 2NH 2 HgI + H 2 O NH 2 / Hg \ O + NH 4 I / Hg \ I 2. NaOH ...
MAJOR EXPERIMENT (CLASS - XII - BIOLOGY) EXERCISES 1
stjohnsschoolkota.edu.inPage 2 (BIOLOGY) (2) Materials required: Digger, polythene bags, scalpel, beakers, measuring cylinders, meshes of different pore sizes, test tube etc. (3) Procedure: (A) With a digger, collect soil from a field put it in a measuring cylinder half filled with water. (B) Shake the cylinder well and allow it to stand undisturbed.
[CLASS XII CHEMISTRY PRACTICALS] - Saint John's Senior ...
stjohnsschoolkota.edu.in[CLASS XII CHEMISTRY PRACTICALS] Evaluation Scheme for Examination Marks Volumetric Analysis 08 Salt Analysis 08 Content Based Experiment 06 Project Work 04 Class record and viva 04 Total 30 Note:- 1. Chemical Equations of Experiment 3 to 11 are to be written on blank pages. ... CO -, ,-, , (CHEMISTRY PRACTICALS) NH ,
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