Changes

<br>'''Materials'''<br>

<br>'''Materials'''<br>

Dinner plate or glass plate, coin, glass tumbler,candle match box and cork.<br>

Dinner plate or glass plate, coin, glass tumbler,candle match box and cork.<br>

<br>'''Procedure'''<br>

<br>'''Procedure'''<br>

Pour some water in the dinner plate and place a coin in it. Fix a candle piece to the cork and place it above the water level in the plate. Light the candle with a match stick and invert a glass tumbler on it carefully.The candle continues to burn with the dull flame and after sometime it is extinguished. The waterfrom the plate rushes inside the tumbler leaving the coin behind. The coin can be picked with hand and shown to the audience.

Pour some water in the dinner plate and place a coin in it. Fix a candle piece to the cork and place it above the water level in the plate. Light the candle with a match stick and invert a glass tumbler on it carefully.The candle continues to burn with the dull flame and after sometime it is extinguished. The waterfrom the plate rushes inside the tumbler leaving the coin behind. The coin can be picked with hand and shown to the audience.

<br>'''Materials'''<br>

<br>'''Materials'''<br>

10g of glucose, 8g of KOH, 300ml of distilledwater, 6-8 drops of methylene blue indicator, 500ml round bottom flask.

10g of glucose, 8g of KOH, 300ml of distilledwater, 6-8 drops of methylene blue indicator, 500ml round bottom flask.

<br>'''Procedure'''<br>

<br>'''Procedure'''<br>

Dissolve 8g of pottassium hydroxide in 300ml of water in 500ml round bottom flask. When the KOH has dissolved add 10g of glucose to the flask and dissolve it by shaking. Add 6-8 drops of methylene blue indicator to the flask and swirl it. Allow the flask to rest untill the solution becomes colourless.<br>

Dissolve 8g of pottassium hydroxide in 300ml of water in 500ml round bottom flask. When the KOH has dissolved add 10g of glucose to the flask and dissolve it by shaking. Add 6-8 drops of methylene blue indicator to the flask and swirl it. Allow the flask to rest untill the solution becomes colourless.<br>

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

Methylene blue indicator is blue in the oxidized form and colourless in the reduced form. It is reduced to the colourless methylene white by alkaline glucose. Shaking the flask dissolves oxygen in the flask and the dye is oxidized back to the blue form.

Methylene blue indicator is blue in the oxidized form and colourless in the reduced form. It is reduced to the colourless methylene white by alkaline glucose. Shaking the flask dissolves oxygen in the flask and the dye is oxidized back to the blue form.

=Coloured Fountain=

=Coloured Fountain=

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

Sodium bicarbonate as it comes into contact with the acid liberates carbon dioxide. The pressure built up pushes the water from the flask in the form of afountain.

Sodium bicarbonate as it comes into contact with the acid liberates carbon dioxide. The pressure built up pushes the water from the flask in the form of afountain.

=Funny liquids=

=Funny liquids=

<br>'''Procedure'''<br>

<br>'''Procedure'''<br>

Place 25ml of carbon tetrachloride in the measuring jar. Add 2-3 crystals of iodine and shake to get a pink colour. Ask the audience what is the resulting colour when pink is mixed with blue. Pour copper sulphate solution into the jar and show the distinct pink and blue layers. Slowly introduce benzene into jar and exhibit the third seperate colourless upper layer. Using a glass rod try to mix the solutions by stirring. The layers remain as they are. Now closing the mouth of the jar with your palm give a vigorous shaking to the jar.Allow the solutions to settle. Exhibit only two layers-pink and blue.<br>

Place 25ml of carbon tetrachloride in the measuring jar. Add 2-3 crystals of iodine and shake to get a pink colour. Ask the audience what is the resulting colour when pink is mixed with blue. Pour copper sulphate solution into the jar and show the distinct pink and blue layers. Slowly introduce benzene into jar and exhibit the third seperate colourless upper layer. Using a glass rod try to mix the solutions by stirring. The layers remain as they are. Now closing the mouth of the jar with your palm give a vigorous shaking to the jar.Allow the solutions to settle. Exhibit only two layers-pink and blue.<br>

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

Copper sulphate solution is immiscible with carbon tetrachloride and the two form seperate layers. Similarly benzene and copper sulphate are immiscible;benzene being lighter forms the upper layer.on vigorous shaking benzene dissolves in carbon tetrachloride and the colourless layer dissappers.<br>

Copper sulphate solution is immiscible with carbon tetrachloride and the two form seperate layers. Similarly benzene and copper sulphate are immiscible;benzene being lighter forms the upper layer.on vigorous shaking benzene dissolves in carbon tetrachloride and the colourless layer dissappers.<br>

=Colour bands=

=Colour bands=

In a tall glass jar or measuring cylinder pour directly about 10 ml of honey( do not pour from the sides). Above the layer of the honey slowly introduce about 10ml of coloured liquid soap. Next introduce pink color by adding coloured water. Similarly introduce vegetable oil and coloured alcohol.

In a tall glass jar or measuring cylinder pour directly about 10 ml of honey( do not pour from the sides). Above the layer of the honey slowly introduce about 10ml of coloured liquid soap. Next introduce pink color by adding coloured water. Similarly introduce vegetable oil and coloured alcohol.

Exhibit the five different bands of colourswhich do not mix with one another.<br>

Exhibit the five different bands of colourswhich do not mix with one another.<br>

=Magic fire=

=Magic fire=

<br>'''Materials'''<br>

<br>'''Materials'''<br>

candle, potassium chlorate 1g, sugar 2g , conc.H2SO4 ,glass rod.

candle, potassium chlorate 1g, sugar 2g , conc.H2SO4 ,glass rod.

<br>'''Procedure'''<br>

<br>'''Procedure'''<br>

The foot of the wick is made a little cup shaped by previous burning. In this cup place a mixture of one gram of potassium chlorate and two grams of sugar. Dip the tip of a glass rod in conc.H2SO4 and bring it in contact with the wick of the candle. The candle catches fire instantly.

The foot of the wick is made a little cup shaped by previous burning. In this cup place a mixture of one gram of potassium chlorate and two grams of sugar. Dip the tip of a glass rod in conc.H2SO4 and bring it in contact with the wick of the candle. The candle catches fire instantly.

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

Potassium chlorate exothermically oxidizes sugar in the presence of conc.H2SO4 and the heat produced is sufficient to light the candle.

Potassium chlorate exothermically oxidizes sugar in the presence of conc.H2SO4 and the heat produced is sufficient to light the candle.

=Fire writing.=

=Fire writing.=

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

Sodiumreacts with water readily liberating hydrogen. Hydrogen as it comes out pushes the sodium and sets it in a random motion. Sodium hydroxide formed during the reaction renders the solution pink in the presence of phenopthalein.

Sodiumreacts with water readily liberating hydrogen. Hydrogen as it comes out pushes the sodium and sets it in a random motion. Sodium hydroxide formed during the reaction renders the solution pink in the presence of phenopthalein.

=Magic Milk=

=Magic Milk=

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

he dish detergent reduces the surface tension of water which allows the food colour to spread around the milk.

he dish detergent reduces the surface tension of water which allows the food colour to spread around the milk.

=Disappearing beakers=

=Disappearing beakers=

<br>'''Discussion'''<br>

<br>'''Discussion'''<br>

Mixture of carbon tetrachloride and benzene has the same refractive index as that of glass and te ray of light passing through the beakers donot suffer refraction and hence the beakers become invisible.

Mixture of carbon tetrachloride and benzene has the same refractive index as that of glass and te ray of light passing through the beakers donot suffer refraction and hence the beakers become invisible.

=Fire ball in hand=

=Fire ball in hand=

=Egg magic=

=Egg magic=

Prepare a concentrated solution of NaCl. Take it in a 100ml beaker. In another beaker  take water. Now take a raw egg and dip in water. It sinks. Take it out and place it in salt solution it flaots.The reason is because of differnce in density.

Prepare a concentrated solution of NaCl. Take it in a 100ml beaker. In another beaker  take water. Now take a raw egg and dip in water. It sinks. Take it out and place it in salt solution it flaots.The reason is because of differnce in density.

=Removing the coin=

=Removing the coin=

=References=

=References=

್ರFuntastic science experiments by Ronald Saldana <ಬ್ರ್br>

್ರFuntastic science experiments by Ronald Saldana <ಬ್ರ್br>

್ರ್ರyou tube -easy home science experiments by appu series.

್ರ್ರyou tube -easy home science experiments by appu series.