What is the pH value of human blood?
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There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number?
How many groups and periods are present in the Modern Periodic Table?
Which city is located on the banks of the river Alaknanda?
Which is the closest star to our solar system?
A deep crack in a glacier is called
Study of earth is known as
What is the reason for formation of Mirage in desert?