set 4 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 4 EXERCISES

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The following question based on acids, bases, salts and metals topic of general science mcq

Questions : The pH of fresh milk is 6. When it turns sour, the pH

(a) becomes > 6

(b) becomes < 6

(c) remains the same i.e., 6

(d) becomes neutral, i.e., 7

The correct answers to the above question in:

Answer: (b)

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Read more chemistry ncert Based General Science Questions and Answers

Question : 1

To develop photographic plates

a) Free Bromine releases

b) Light affected area quickly oxidizes

c) Sodium thiosulphate is used as oxidising agent

d) The solution is kept developing until all the Bromide is not dissolved

Answer: (c)

Question : 2

Acid turn blue litmus –

a) red

b) yellow

c) green

d) orange

Answer: (a)

Question : 3

Natural indicator litmus is extracted from

a) earthworms

b) ants

c) lichens

d) algae

Answer: (c)

Natural indicator is obtained from lichens and is purple in colour. It turns acidic solution red and basic solution blue.

Question : 4

On which of the following acid rain has adverse effects?

a) Historical monuments

b) Aquatic life

c) Marble structures

d) All of these

Answer: (d)

Acid rain affects all of them. Acid rain corrodes historical monuments and marble structures.

Acid rain alters the pH of water bodies by making it more acidic thus affecting aquatic plants and animals.

Question : 5

Which of the following is acidic in nature –

a) soap solution

b) slaked lime

c) apple juice

d) lime

Answer: (c)

Soaps are sodium salts of higher fatty acids.

Question : 6

What is Neela thotha?

a) Calcium Sulphate

b) Iron Sulphate

c) Copper Sulphate

d) Sodium Sulphate

Answer: (c)

GET acids, bases, salts and metals PRACTICE TEST EXERCISES

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