Chemistry

1.The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called

granite basalt igneous rocks sedimentary rocks

2.The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

Dalton's law Gay Lussac's law Henry's law Raoult's law

3. The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

helium ozone oxygen methane

4.The most commonly used bleaching agent is

alcohol carbon dioxide chlorine sodium chlorine

5.The heat required to raise the temperature of body by 1 K is called

specific heat thermal capacity water equivalent None of the above