In an aqueous solution containing a 1:1 mixture of SDS (sodium dodecyl sulfate and cocoamido propyl betaine (CAPB) near its CMC, which of the following statements is true with regard to their concentration at the air - liquid interface: same as in bulk, 1:1 Interface will be richer in SDS Interface will be richer in water with SDS and CAPB having negative adsorption Interface will be richer in betaine

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