Statement - I : 1 mole Ra²²⁶ on alpha disintegration will give 44.8 lit of gaseous product at S.T.P
Statement - II : 1mole Ra²²⁶ on alpha disintegration will give 1 mole radon and one mole helium

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Both statements I and II are correct

Statement-I is correct and statement-II is incorrect

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

answer is A.

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Detailed Solution

Both Statement I and Statement II are correct and are related to the alpha decay of Ra²²⁶.

Statement II is true because when Ra²²⁶ undergoes alpha decay, it emits an alpha particle (which is equivalent to a helium-4 nucleus) and transforms into Ra²²⁶, also known as radon. Therefore, one mole of Ra²²⁶ will give one mole of radon and one mole of helium.

Statement I is also true because both radon and helium produced by the alpha decay of Ra²²⁶ are gases at standard temperature and pressure (STP). One mole of any gas at STP occupies a volume of 22.4 liters, so one mole of radon and one mole of helium produced by the alpha decay of Ra²²⁶ will occupy a total volume of 44.8 liters at STP.

Therefore, both statements are correct and related to the alpha decay of Ra²²⁶.

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