procedure of laboratory preparation of oxygen

Sand soaked with kerosene is taken in hard glass test tube. The test tube is clamped horizontally to a clamp stand Broken pumice is placed at the other end of the test tube. The apparatus is assembled as shown in the figure. The burner is lighted and the test tube is heated strongly. ..

1. Prepare acidic solution of ammonium molybdate by dissolving 1 g of it in 10-15 ml of nitric acid. 2. Take 1-2 drops of this solution on a glass slide and mount the section of chlorophyll-free leaf in it. Observe under the microscope after 30 minute..

1. Mount a section of the chlorophyll-free leaf in water. 2. Place a cover slip over it. 3. Pour a drop or two of 50% H 2 SO 4 on one side and drain off water from the other side by means of a blotting pap..

1. Mount the section of a chlorophyll-free leaf in 20% potassium ferrocyanide. 2. Keep it lying for 10-15 minutes. 3. Then add a drop of dilute 5% HCl to the mount. 4. Again allow the reaction to proceed for a few minutes. 5. Add distilled wat..

Any of the above mentioned methods could be used to prepare oxygen in the laboratory. Mercuric and silver oxides are not used for the preparation of oxygen, as they are very expensiv..

Any of the above mentioned methods could be used to prepare oxygen in the laboratory. Mercuric and silver oxides are not used for the preparation of oxygen, as they are very expensive. For the laboratory preparation of oxyge..

In this procedure, a drop of the test solution is applied as a small spot near one edge of the filter paper and the spot is dried. Then, the end of the paper strip is dipped into a developing solvent. The liquid is sucked up through the capillaries of the paper; it reaches the mixture an..

The antibody, which is specific to the antigen to be detected must be present in the kit. The sample, which is suspected to contain the antigen is immobilised on the ELISA plate. The specific anti body is added and allowed to react with the antigen. Washing will remove all free antibodies. The ant..

Small pieces of coal are taken in test tube A. Test tube A is fitted with a rubber stopper carrying a delivery tube and is clamped to the clamp stand. Test tube B containing water is clamped vertically to the clamp stand. The apparatus is assembled as shown in the figure. The burner i..

Ammonium chloride and calcium hydroxide are ground together and heated slowly in a round bottomed flask with its neck sloping downwards. The gas is passed through a drying tower before collectio..