Air ___________________ are the substances which contaminate the air.
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Which of the following is a natural polymer?
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 _______.
Atomic number of which of the following elements is greater than that of Calcium?
The tenth element in the Newland's periodic classification resembles the
Why is Carbon Monoxide a pollutant ?
Which of the following is a commercial source of energy?
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