pH in daily life: digestion, stings and remedies

This type of question, asked 3 times: 2023, 2024, 2026. All 4 questions below, oldest first.

Try each one first, then open its answer.

Question 1
2023
28 $(a) Suggest one remedial measure each to counteract the change in pH in human beings in following cases : (i) Production of too much acid in stomach during indigestion (ii) Stung by a honey bee / nettle leaves (b) Fresh milk has a pH of 6. When it changes into curd will its pH increase or decrease ? Why ?$
Question 2
2024
2 $The acid produced in our stomach during digestion and the base used to neutralise the excess acid during indigestion respectively are :$
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Question 3
2026
21 $The pH of the gastric juices released during digestion is :$
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Question 4
2026
25 $Why does one feels pain and irritation when stung by honey-bee ? Rubbing of baking soda on the stung area gives relief. How ?$

Question 1