Category Archives: Chemistry

When people’s teeth exploded like bomb

Yes, there is enough evidence that many people’s teeth exploded like bomb in their mouth. It was in 19^th century and it’s still a mystery; no one knows why it happened. The dental cosmos was the first major journal for American dentists, in this journal a Pennsylvania dentist WH Atkinson documented an outbreak of… Read the rest

Sea salt and Table salt

For thousands of years salt was a very important commodity. Producing salt from sea water wasn’t easy but salt was necessary for preserving foods. In fact salt enabled human civilization to preserve foods. It was a very expensive commodity and in sometimes roman armies were paid in salt. The word salary comes from the Latin… Read the rest

Why do we put salt on icy road instead of heating?

Instead of heating we use salt to melt snow. Because snow will continue to fall on road and freeze again, but salt decrease freezing point and prevents forming of ice. Usually table salt sodium chloride is used but calcium chloride is twice effective than sodium chloride and used in countries like Russia. Do you know… Read the rest

Lemon battery

Making a lemon battery is very easy. Lemon contains citric acid and with the help of citric acid two different metals can generate electricity. You will need lemon, copper coin, zinc coated nail, crocodile clip, multimeter and a LED to make battery. It can be a science fair project also. So watch this hilaroad video… Read the rest

Battery from coin

It’s a very simple experiment to generate electricity from copper coins and I bet you will enjoy. This copper coin battery can light LED, can power your TV remote controller. Along with ten copper coins you will need cardboard, foil, vinegar, salt water, scissors, plastic tape and a LED to check whether your battery is… Read the rest

How much sugar is added to a can?

Excessive sugar is never a good thing. Perhaps you can’t imagine how much sugar is added to a can of soda or fruit drinks. It’s seven to eight tea spoon of sugar. Do you normally take this amount of sugar at home? Marshal Brain explaining this with an experiment which you can do at home.… Read the rest

Carbon dioxide is heavier than air

Yes we all know that carbon dioxide is heavier than air, but how can we prove it? It can be proved with common chemicals found in kitchen. Reaction between baking soda (sodium bicarbonate) and vinegar produces carbon dioxide which can extinguish fire. Watch the simple experiment video and of course try at home!… Read the rest

Extinguishing a candle, some funny methods

Extinguishing a candle is very simple. But it can be funny if you associate some science in unusual fashion and Physics Girl doing exactly the same thing. She uses some unusual things like copper coil, baking soda, vinegar, glass and even liquid nitrogen to extinguish fire. Don’t forget heat and oxygen is key ingredients of… Read the rest

Mass energy relation in Chemistry

When we hear something about mass energy relation, we imagine the power of a nuclear bomb. It’s correct, when nuclei split into two or three parts it loses mass and that mass is converted into energy. Mass energy relation is one of the consequences of Einstein’s theory of relativity. In fact the famous E=mc²… Read the rest

Greek Alphabet

Greek alphabet Most of us don’t know Greek. But we need to learn Greek Alphabet because it is used in science and mathematics so frequently. I have tried to make a list with English and Bangla pronunciation. Greek_Alphabet… Read the rest