In a compound the elements are always present in definite proportions by ______
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Of the following commonly used materials, the one that is not an alloy is
When Granite rocks get metamorphosed, they form
The mass of proton and mass of ________ is same.
Alkali metals can
Chemical Formula of Water is _____ .
Which of the following inert gases is placed in period 4 of the periodic table?
The polar ice-caps are made of ____________ water
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