Which of the following is used in gunpowder?
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Atomic number of which of the following elements is greater than that of Fluorine?
Nitric acid does not react with
A change in which no new substances are formed is called _____________.
When iron is exposed to moist air, a reddish brown coating of hydrated Iron (III) Oxide (Fe2O3) is deposited on its surface. This reddish brown coating is called
Pentlandite is an ore/mineral of _______.
The tenth element in the Newland's periodic classification resembles the
Pyrolusite is an ore/mineral of ___________.
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