What is german silver?
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What is gas-filled lamp ?
What are filters? Why are they used?
Explain the Compound?
Explain the term aliquot and diluent?
What is an alloy ?
What is Refractory Materials?
Is diamond element ?
Why does a pencil look cracked, when partly immersed in water ?
What is Catalysis ?
however ozone is havier than oxygen still ozone is up there in sky why?
If you are given two liquids, which look like water, how can you, by two physical tests, prove which one of them may be water ?
Why is Davy Lamp called a Safety Lamp ?