Methane contributes towards global warming so it is called a _________________ gas.
What is the process of slow cooling of hot glass called?
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When two liquids do not mix with each other to form a solution, what is it called?
Which of the following is used in making perfumes as well as flavouring agents?
An element has an atomic weight of W and an atomic number of N. The number of protons in the nucleus of its atom is
Which of the following elements has a total of 3 shells with 8 electrons in the last orbit?
Common salt (NaCl) is made up of
The tenth element in the Newland's periodic classification resembles the
An element with an atomic number of ___ will form a basic oxide.
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