Q. The process of removing calcium and magnesium from hard water is known as
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Q. Which of the following is the poorest conductor of electricity?
Q. Brass gets discoloured in air because of the presence of which of the following gases in air ?
Q. Which one is a naturally occuring noble gas?
Q. The acid rain destroys vegetations because it contains
Q. Which sample of matter is a mixture?
Q. Radioactive isotope of hydrogen is
Q. Which of the following contains high content of lead?
Q. The atoms of the elements which have same number of neutrons are called
Q. For Galvanizing Iron which of the following Metals is used?
Q. In Which among the given ions, the colour is not due to d-d transition -
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