Apparatus provided in the kit Are ...

Below is the list of some of the apparatus provided.

1. Small portable box with revolving top for easy access to chemicals

and apparatus, replacing big racks.

2. Polyethylene dispensing bottles (squeeze type) to dispense liquid

chemicals drop wise avoiding contamination of chemicals.

3. Well plates for fast and easy precipitation.

4. W -tubes for fast gas absorption.

5. Aluminum block for safe determination of melting point and boiling

point.

6. Kerosene burner

7. Micro burettes.

8. Plastic droppers for easy transfer of liquids.

9. Miniature glasswares for least consumption of chemicals.

10. Micro filtration unit.

11. Micro spatulas

Description of Kit Items

Comments

Young’s Modulus ‘Y’ By Searle’s Method

Aim: To determine Young’s modulus of elasticity of the material of a given wire by Searle’s method. Procedure: i. Arrange the experimental set up as shown in diagram. Attach a zero load (slotted hanger it self) and dead load (E) to the frames of the experimental wire and dummy wire respectively so that the wires become free of kinks and remain vertically straight. ii. With the help of micrometer screw gauge, find the correct diameter of the wire at three different places. At every place two readings of the micrometer are taken while holding it in one position and another perpendicular to it by rotating through 90°. iii. In all, six readings of the diameter of the wire are taken. Hence mean diameter and radius of the wire is found out. iv. Adjust the spirit level so that the air bubble is at the centre. Note down the reading of the micrometer screw (M) attached to it. This is zero reading. (This contains main scale reading ...

laboratory work

Introduction The crucial role of practical work and experimentation in science curriculum is universally accepted. This is more so in chemistry which is an experimental science. Most of the concepts in this area are better understood by doing the practical work. The aims and objectives of practical work in the laboratory can be stated as follows: 1. better understanding of scientific concepts and principles. 2. promotion of basic skills and competencies (procedural and manipulative skills, observational skills, drawing skills, reporting and interpretation skills). 3. awakening and maintaining curiosity in the learning environment. The laboratory work is an indispensable part of chemistry instruction. Despite several laudable efforts in the past, experiments, by and large, have continued to be marginalised in school education, and have not received the due importance. There are several factors which contribute towards neglect of the labora...

Qualitative analysis test

To detect one cation and one anion from the following: (Insoluble salts to be excluded) Apparatus: Micro test-tubes with stand, test tube holder, kerosene burner, W-tube, well plate, dispensing bottles, china dish, cotton swabs, charcoal cavity, W. Tube etc. Chemicals: 6MH2 SO4, 6MHCl, lime water, sodium carbonate, sodium metal, BaCl2 solution, KMnO4 solution, KI solution, starch solution, acetic acid Introduction: The inorganic qualitative analysis involves the identification of ions present in a sample. The salt consists of anion and cation. The basis of identification is the observed chemical behaviour of the components. The salt analysis may be systematically carried out in the following three steps: i) Preliminary examination ii) Detection of anions and iii) Detection of cations Preliminary examination: First we proceed to examine the physical properties of the salt. This is followed b...

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