The gas, commonly known as “laughing gas”, is

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Hydrogen peroxide (H2O2)______________?

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The property of a substance to absorb moisture from the air on exposure is called____________?

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The ability of the Eye to see in the dark, is due to the production of a purple pigment known as________?

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Retinal is the chemical name of

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Most of the weather phenomena take place in which of the following layers of the atmosphere?

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