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The action of salivary enzymes on starch converts it to sugar and hence no starch in the test-tube. Thus no blue colou..

From the top of a tower of height h meters the angle of depression of a red car is φ ° and the angle of depression of a blue car which is on the opposite side of the tower is θ °. If the distance between the foot of the tower and the red car is y mete..

Take a test tube containing distilled water. Bubble sulphur dioxide gas through it for a few minutes. Take a blue litmus paper and dip it into the distilled water of the test tube. The blue litmus paper turns red indicating that the water, which was initiall..

Take hydrated copper (II) sulphate crystals in a test tube and heat. The blue crystals in the test tube start turning white on heating. Water vapours released on heating condense on the cooler part of the test tube. Collect the water drops in a dish. The cry..

Rinse mouth 2 to 3 times to remove any food particles and collect saliva in three test-tubes labelled A, B and C. To B add half the quantity of 2% starch solution. To C add boiled saliva. Leave them for 5 minutes. At the end of five minutes, a) Addition of iodine to A gives no blueh..

Tests for Chlorine - 1. Chlorine is a greenish yellow gas with a pungent and irritating odor. 2. It turns wet blue litmus paper red and then bleaches it. 3. Colored petals and the leaves of plants can be bleached by it. 4. Chlorine turns wet starch potassium iodide paper blue by..

If we wet a blue cobalt chloride paper with these condensed droplets, the cobalt chloride paper turns pink. Blue cobalt chloride turns pink in presence of slightest amount of water. Also, if you sprinkle a little powder of white anhydrous copper sulphate on this liquid, it turns..

The given organic compound is mixed with dry copper oxide (CuO) and heated in a hard glass tube. The products of the reaction are passed over (white) anhydrous copper sulphate and then bubbled through lime water. If copper sulphate turns blue due to the formation of CuSO 4 .5H ..

A round bottomed flask is first dried well. It is then filled with dry hydrogen chloride gas and fitted with a one holed rubber stopper as shown in the figure 5.5...

Put some germinating seeds in a conical flask. With the help of a thread suspend a small tube containing KOH in the flask. Through the hole of the cork pass a glass tube bent twice at right angles. One end of the tube is in the flask while the other end is in..