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What is the most common salt in sea water -
What is the most commonly used substance in fluorescent tubes
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period
What is the name of the first satellite left by India?
What is the name of the sound wave with less then 20Hz frequency.
What is the number of chromosomes in a normal human body cell
What is the pH value of salt and water.
What is the purpose of adding baking soda to dough?
What is the reason among the following, behind the floating of clouds ?
What is the term used for the ability of a metal to be drawn into thin wires ?