NSO Level 1- Science Olympiad (SOF) Class 7: Questions 238 - 244 of 593

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Question number: 238

» Physical and Chemical Changes

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MCQ▾

Question

Which of the following is an example of chemical change?

Choices

Choice (4) Response

a.

Formation of dew on leaves

b.

Crystallization

c.

Curdling of milk

d.

All of the above

Question number: 239

» Nutrition in Plants and Animals

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MCQ▾

Question

What type of digestion is found in Hydra?

Choices

Choice (4) Response

a.

Neither of the above

b.

Intracellular digestion

c.

Extracellular digestion

d.

Both b. and c. are correct

Question number: 240

» Nutrition in Plants and Animals

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MCQ▾

Question

Holozoic mode of nutrition is associated with which of the following?

Choices

Choice (4) Response

a.

Paramecium

b.

Hydra

c.

Amoeba

d.

Mosquito

Question number: 241

» Acids, Bases and Salts

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MCQ▾

Question

Acetic acid is found in which of the following?

Choices

Choice (4) Response

a.

Lemon Juice

b.

Detergent

c.

Vinegar

d.

Apple Juice

Question number: 242

» Physical and Chemical Changes

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MCQ▾

Question

Stainless steel is made by mixing iron with which of the following?

Choices

Choice (4) Response

a.

Manganese

b.

Nickel

c.

Carbon

d.

All a. , b. and c. are correct

Question number: 243

» Acids, Bases and Salts

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MCQ▾

Question

Which of the following is an example of a Weak base?

Choices

Choice (4) Response

a.

LiOH

b.

NH3

c.

NaOH

d.

All of the above

Question number: 244

» Acids, Bases and Salts

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MCQ▾

Question

In an experiment phenolphthalein is added to a base solution, the solution turns pink. What will be the resulting color of the solution if acid is added to the above experimental tube?

Choices

Choice (4) Response

a.

Colorless

b.

Blue color

c.

No changes in the color.

d.

Red color

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