MCQ
A solution which maintains constant pH when small amounts of acid or alkali are added is known as ____.
- AIndicator
- BBuffer
- CAmphoteric
- DNeutral
Explanation:
A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
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The observed pattern of electrophilic substitution can be explained by
$(A)$ the steric effect of the halogen
$(B)$ the steric effect of the tert-butyl group
$(C)$ the electronic effect of the phenolic group
$(D)$ the electronic effect of the tert-butyl group