Change Water Into Blood

MATERIALS :

• Sodium carbonate
• 2 glass
• Phenolphthalein indicator
• Rod 

OR

• Ferric salt
• Ammonium thio cynate OR Pottasium thio cynate .

PROCEDURE :

• Coat sodium carbonate to the bottom of a glass.
• Fill the second glass half full of water. Add 10 drops of phenolphthalein indicator solution to the glass.
• To change water into blood , pour the water into the glass containing the sodium carbonate.
• Stir well the water will change from clear to red.

Burning Money

               A combustion reaction occurs between alcohol and oxygen producing heat, light, carbon dioxide and water. Rupee not is soaked an alcohol water solution, the alcohol has a high vapour pressure and is mainly on the out side of the material. when the rupee is lit the alcohol is what actually burn ? The temperature at which the alcohol burns is not high enough to evaporate the water which has a high specific heat so the rupee remains wet and isn't able to catch fire on its won.

                   After alcohol burned, the flame goes out.

PROCEDURE ?

• Mix 50 ml of water with 50 ml 100% pure alcohol.
• Add a pinch of salt to the solution
• Soak a rupee into the solution, that it is thoroughly wet.
• Use tongs to pick up the rupee.
• Allow any excess liquid to drain it.
• Move the rupee away from the solution.
• Light the rupee on fire and allow it to burn until the flame goes out.

REASON :

• Alcohol has high vapour pressure. So alcohol easily catch fire and burns quickly.
• But the temperature not enough to the water. so the rupee remains wet. Isn't able to catch the fire.

Egg in a Bottle

 MATERIALS :

• Egg ( boiled one )
• Conical flask
• Paper
• Match box

PROCEDURE :

• Take a piece of paper, fire it and drop it into the bottle.
• Set the egg on the top of the bottle.
• When the flame go out , the egg will get pushed into the bottle.

REASON :

• Pressure of the air present in inside and out side of the bottle same.
• Change the temperature of the air inside the bottle that time the pressure also change inside the bottle.
• So that inside the pressure decrease and the out side pressure increase .
• So high pressure will push the egg into the flak.

Baking soda volcano

MATERIALS :

• 4 cups flour
• 2 tsp salt
• 3 tsp cooking oil
• Warm water
• Plastic soda bottle
• washing detergent 
• Food coloring
• Vinegar
• Baking dish
• baking soda

PROCEDURE :

• Mix 4 cup of flour, 2 tsp of salt, 3 tsp of cooking oil and warm water.  Make them dough.
• stand the soda bottle in the baking pan and mold the dough around into a cone shape. Don't cover the hole.
• Fill the bottle with warm water and a pinch of orange food color.
• Add detergent to the bottle.
• Add 2 tsp of baking soda to the liquid.
• Slowly pour vinegar into the bottle.
• Watch out- eruption time.

WHY ?

       The chemical reaction between the baking soda and vinegar. in this reaction carbon dioxide gas is evolved. The same reaction present in real volcanoes also. 

Bend water

MATERIALS :

•  Nylon comb or Latec balloon .
• Water faucet.

PROCEDURE :

• Dry the hair with nylon comb.
• Turn the tap water a narrow stream of water is flowing.
• Move the comb close to the water. Now the narrow stream of water bend towards the comb.
• The amount of bend depends on how close the comb is to the water 

Why Smoking Causes Cancer ?

                                          Tobacco smoke contain more than 60 carcinogenic compounds. 4000 individual substances identified in tobacco smoke, including carbon monoxide, hydrogen cyanide, ammonia and other toxic irritants. The main reason is tobacco contains nicotine. Nicotine is a additive content which alters brain functioning.

                                           Nicotine is naturally occurring liquid alkaloids. When a man smoke nicotine is absorbed through the skin and mucosal lining of the mouth and nose and by inhalation int he lungs. In the body it activate the same reward system as do other drugs such as cocaine. in the brain nicotine increases the level of neurotransmitter dopamine. so the brain responsible for feeling pleasure. People continue dosing themselves frequently throughout the day to maintain the pleasurable effects of nicotine and to prevent withdrawal symptoms.

Why do onion make you cry ?

                                   Onion cells contain some chemical compounds like sulfur. Cut the onion its cells are broken and the chemical compounds are released into the air. So that more volatile sulfured products are formed. Sulfured compounds react with the moisture in eyes forming sulfuric acid. Which produce a burning sensation. So that the tears comes out.

How To Avoid ?

• Chop the onion under cold water. The volatile sulfured compounds will be released but then they react  with the water, instead of reaching your eyes.
• You can freeze the onion for 10 minutes before cutting it. The cold temperature of the onion will slow down the chemical reaction which forms the volatile sulfured compounds.