who invented the first projector?
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What is the difference between caustic soda and washing soda ?
Why are substances like caustic soda and calcium chloride called hygroscopic substances ?
How many millilitre is equal to 1 litre and how many microliter is equal to litre?
Why do clothes dry quicker in wind than in still air ?
Can a molecule be divided ?
When the heat rays from the sun area focused on a piece of black cloth by means of a lens, the cloth catches fire. Why ?
What is gas-filled lamp ?
What is Basicity of an acid ?
What is the role of silver sulphate?
why helium does not react with other elements?
Explain the Charle?s law ?
What is the white precipitate produced at the end of point?