Atomic number of which of the following elements is greater than that of Fluorine?
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Which of the following is used in gunpowder?
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
The tenth element in the Newland's periodic classification resembles the
Pentlandite is an ore/mineral of _______.
Pyrolusite is an ore/mineral of ___________.
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