glass jar with cork stopper

Spinach leaves, pestle and mortar, 80% acetone, calcium carbonate, Buchner funnel, beaker, measuring cylinder, glass jar with a tight cork. Whatmann No.1, filter paper, petroleum ether, acetone, hook, micropipett..

A cork is pushed down into water kept in a glass. We find that as soon as it is released, the cork rises on its own and comes to the surfac..

This is a small (3 mm diameter, 35 mm length) glass bottle with a very light stopper. This is used for introducing the sample into the Victor Meyer's tub..

Hold a bottle cork in one hand firmly and cut a thin slice with the help of a blade. Place the section in a drop of water on a glass slide and observe under a microscope. You will find cells, which are box-like and closely packed togethe..

A liquid (water), having boiling point about 20 to 30C higher than that of the given liquid (whose molecular mass is to be determined) is poured into the outer jacket so as to fill its bulb up to one-third its capacity. Cleaned and dried Victor Meyer's tube is suspended into the outer copper jacke..

Take two glass jars A and B. Collect sulphur dioxide gas in jar B and let jar A contain air. Carefully invert jar B containing sulphur dioxide, over the jar A containing air. Keep it for a few minutes (Fig. 7.3). Remove jar ..

Buoyancy - A cork is pushed down into water kept in a glass. We find that as soon as it is released, the cork rises on its own and comes to the surface. Pressure pushes cork upwards To keep it beneath the surface of water, we have to exert downward force. Thi..

Yellow phosphorus is placed in a graduated tube arranged as shown in Jar- A of Fig.5.4 (b). Leave this arrangement for a few days. Phosphorus smoulders, making use of the oxygen in air enclosed in the tube. Water enters the glass tube and reaches about 21 ml mark (Jar..

Take a bell jar. Towards its rounded end, fix a 'Y' shaped glass tube and on the open ends of the two branches tie a balloon each. On its open end tie a thin rubber sheet. The cavity of the bell jar acts as the thoracic cavity, the "Y" shaped tube as the trachea that ..