The pH of a solutiion is 3. When its pH changes to 6, then H+ ion concentration
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By volume, 78% of air is _______________
Sulphur and Chlorine can have what type of a bond?
Which of the following gases are responsible for the greenhouse gas effect on Earth?
Which of the following elements has the lowest melting point?
___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
According to an early Indian philosopher everything is made up of ___ basic elements.
_______________ of a material is defined as the minimum amount of the work necessary to remove a free electron from the surface of the material.
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