-2 BASIC LABORATORY TECHNIQUES T - NCERT

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(iv) Rotate the tube slowly until the portion, which is kept in the flame, becomes red hot and soft. (v) Remove the tube from the flame and pull the ends apart slowly and smoothly until it becomes narrow in the middle and then stretches into a fine jet as shown in Fig. 2.6 b. (vi) Cut the tube in the middle (Fig 2.6 c) and make the jet

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