The smell that we get when LPG cylinder leaks is due to the presence of
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In the modern periodic table, which of the two periods contain 8 elements each?
Two or more elements combine to form a
In the Modern Periodic Table elements present in the same period will have the same
Which of the following metals is found in free state?
In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:
Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?
Which of the following gases is used to prevent food material from getting oxidised?
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