NSO Level 1- Science Olympiad (SOF) Class 7: Questions 180 - 185 of 593

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Question number: 180

» Acids, Bases and Salts

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MCQ▾

Question

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

Question number: 181

» Physical and Chemical Changes

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MCQ▾

Question

An iron rod is placed in blue solution of copper sulphate. What will be the changes in the color of the solution?

Figure of the copper sulphate

Figure of the Copper Sulphate

Figure of the copper sulphate

Choices

Choice (4) Response

a.

Red

b.

Blue

c.

Green

d.

Brown

Question number: 182

» Physical and Chemical Changes

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MCQ▾

Question

Salt is obtained from sea water by the process of

Choices

Choice (4) Response

a.

Crystallization

b.

Amalgamation

c.

Neutralization

d.

Galvanization

Question number: 183

» Nutrition in Plants and Animals

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MCQ▾

Question

What is the principle of starch test using iodine as an indicator? Select the correct option.

Iodine test for starch

Iodine Test for Starch

Iodine test for starch

Choices

Choice (4) Response

a.

Iodine reacts with starch and gives black-blue colour.

b.

Iodine changes colour in presence of starch.

c.

Question does not provide sufficient data or is vague

d.

All of the above

Question number: 184

» Heat

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MCQ▾

Question

What is the form of energy that produces feeling of hotness is called?

Choices

Choice (4) Response

a.

Frictional energy

b.

Heat energy

c.

Kinetic energy

d.

All of the above

Question number: 185

» Fibre to Fabric

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MCQ▾

Question

The following steps are involved in the processing of which fibre?

The processing fibre

The Processing Fibre

The processing fibre

  1. Shearing

  2. Scouring

  3. Sorting

  4. Combing

  5. Dyeing

  6. Spinning

Choices

Choice (4) Response

a.

Nylon

b.

Wool

c.

Cotton

d.

Silk

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