Acids, Bases and Salts [NSO Level 1- Science Olympiad (SOF) Class 7]: Questions 1 - 6 of 43

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Question 1

Question MCQ▾

Potassium chlorate is used in which of the following industry?

Choices

Choice (4)Response

a.

Match industry

b.

Detergent industry

c.

Juice industry

d.

Soap industry

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Question 2

Question MCQ▾

Curd contains which of the following acid?

Choices

Choice (4)Response

a.

Malic acid

b.

Acetic acid

c.

Lactic acid.

d.

Citric acid

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Question 3

Question MCQ▾

Which of the following is a property of acid?

Image Shows the Acid

Choices

Choice (4)Response

a.

It tastes bitter.

b.

It turns red litmus paper to blue.

c.

It turns blue litmus paper to red.

d.

None of the above

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Question 4

Question Match List-Ⅰ List-Ⅱ▾

Match the Column I & Column II by selecting the correct option?

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Salt

(i)

HCl

(B)

Base

(ii)

Baking Soda

(C)

Acid

(iii)

NH4Cl

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)

a.

  • (iii)
  • (i)
  • (ii)

b.

  • (ii)
  • (iii)
  • (i)

c.

  • (iii)
  • (ii)
  • (i)

d.

All of the above

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Question 5

Question MCQ▾

In a titration experiment, lime water turns green in presence of which of the following indicators?

Choices

Choice (4)Response

a.

Bromothymol Blue

b.

Methyl Orange

c.

China Rose

d.

Phenolphthalein

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Question 6

Question MCQ▾

The given figure shows the color changes in the experimental tubes for acid-base titration. Identify the indicator used in the experiment by selecting the correct option.

Identify the Indicator Used in the Experiment

Choices

Choice (4)Response

a.

Methyl Red

b.

Methyl Orange

c.

Phenol Red

d.

Phenolphthalein

Edit