Which of the following statements are correct regarding Arrhenius theory of acid and base? (a) T...

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Which of the following statements are correct regarding Arrhenius theory of acid and base?
(a) This theory was applicable to only aqueous solutions
(b) This theory was applicable to all solutions
(c) This theory could not explain the basicity of substances like ammonia which do not possess a hydroxyl group
(d) Both (a) and (c)
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