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Which of the ...

Question

Which of the following are acidic and which are basic?
(a) Lime water (b) Vinegar (c) Toothpaste (d) Stomach juices (e) Lemon juice (f) Baking soda solution (g) Milk of magnesia (h) Ammonia solution (i) Shampoo (j) Aerated drinks

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Solution

Acidic: vinegar, stomach juices, lemon juice, aerated drinks
Basic: lime water, baking soda solution, milk of magnesia, ammonia solution, shampoo

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Q. Separate the following into substances having pH values above and below 7. How do these influence litmus paper?
(i) Lemon juice
(ii) Solution of washing soda
(iii) Toothpaste
(iv) Vinegar
(v) Stomach juices

Which of the following does not conduct electricity ?
(a) Vinegar solution
(b) Sugar solution
(c) Lemon juice solution
(d) Caustic soda solution

Q. A group of students measured the pH of some substances they found in their homes. Their results are given in the following table:

Substance	pH	Substance	pH
Apples	3.0	Salt	7.0
Baking soda	8.5	Sugar	7.0
Black coffee	5.0	Toothpaste	9.0
Household ammonia	12.0	Vinegar	3.0
Lemon juice	2.5	Washing soda	11.5
Milk	6.5

(a) What would the students have used to measure the pH?
(b) Which solution is the most acidic?
(c) Which solution is the most alkaline?
(d) Which solutions are neutral?
(e) Which solution can be used to treat wasp stings?
(f) Which solutions can be used to treat bee stings?

If someone is suffering from the problem of acidity after overeating, which of the following would you suggest as remedy ?

Lemon juice, Vinegar, Baking soda solution

Give reason for your choice.

Substance	pH	Substance	pH
Apples	3.0	Salt	7.0
Baking soda	8.5	Sugar	7.0
Black coffee	5.0	Toothpaste	9.0
Household ammonia	12.0	Vinegar	3.0
Lemon juice	2.5	Washing soda	11.5
Milk	6.5

A group of students measured the pH of some substances they found in their homes. Their results are given in the following table:

(a) What would the students have used to measure the pH?

(b) Which solution is the most acidic?

(c) Which solution is the most alkaline?

(d) Which solutions are neutral?

(e) Which solutions can be used to treat wasp stings?

(f) Which solutions can be used to treat bee stings?

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