which of the following em waves can be polarized?1. X rays 2.sound waves?Give reason for your answer

Transverse waves have 2 components (electric E component, and a magnetic M component) these two components propagate at right angles to each other (i.e. it travels in two dimensions). Therefore it is possible to polarize transverse waves. Example electromagnetic waves. Hence, X rays can be polarised.
Sound waves in air travel parallel to the direction that the particles within it oscillate it therefore they are longitudinal in nature - it propagates in 1 dimensional direction so it can not be polarized.

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Yes to xrays but no to sound waves because they are air pressure waves. sound waves are not electromagnetic (EM) waves at all.

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