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The pollution from petroleum spillage in rivers and lakes can best be dispersed by
Which of the following statements is correct about the average kinetic energy of the molecules of a gas?
An element X with relative atomic mass 16.2 contains two isotopes \(^{16}_{8}\)X with relative abundance of 90% and \(^{m}_{8}\)X with relative abundance of 10%. The value of m is
Four elements W, X, Y and Z have atomic number 2,6,16 and 20 respectively. Which of these elements is a metal?
Millikan's contributions to the development of atomic theory is the determination of
An oxide XO\(_2\) has a vapour density of 32. What is the atomic mass of X?
Cancerous growths are cured by exposure to
A particle that contains 9 protons, 10 neutrons and 10 electrons is a
What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?
[H = 1, O = 16]
25cm\(^3\) of a gas X contains Z molecules at 15\(^0\)C and 75 mmHg. How many molecules will 25cm\(^3\) of another gas Y contain at the same temperature and pressure?