What is the process of slow cooling of hot glass called?
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Name the respiratory organs of insects
Sphalerite is an ore/mineral of
In the following gases, which is not a colorless or odourless gas?
Acid Rain has pH value of
15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?
When the productive capacity of the economic system of state is inadequate to create sufficient number of jobs, it is called _______
Which is NOT an example of organism that takes in whole food material and breaks it down inside its body?