NSO Level 1- Science Olympiad (SOF) Class 7: Questions 186 - 191 of 593

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Question number: 186

» Heat

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MCQ▾

Question

A polished silvery surface is a of heat.

Choices

Choice (4) Response

a.

Good reflector

b.

Good conductor

c.

Poor reflector

d.

None of the above

Question number: 187

» Acids, Bases and Salts

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MCQ▾

Question

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

Identify the Indicator Used in the Experiment

Identify the indicator used in the experiment

Choices

Choice (4) Response

a.

Methyl Red

b.

Methyl Orange

c.

Phenol Red

d.

Phenolphthalein

Question number: 188

» Physical and Chemical Changes

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MCQ▾

Question

Which of the following changes during a chemical change?

Choices

Choice (4) Response

a.

Chemical property

b.

Physical property

c.

Composition of a substance

d.

Both a. and c. are correct

Question number: 189

» Nutrition in Plants and Animals

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MCQ▾

Question

Which of the following initiates the processing of food?

Choices

Choice (4) Response

a.

Chewing by teeth.

b.

Absorption by intestine.

c.

Carbohydrate digestion by salivary amylase.

d.

Detoxification by liver.

Question number: 190

» Physical and Chemical Changes

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MCQ▾

Question

A chemical change is always a ________ change. Select the correct option which fills the blank.

A chemical change

A Chemical Change

A chemical change

Choices

Choice (4) Response

a.

Reversible change

b.

Irreversible change

c.

Temporary change

d.

None of the above

Question number: 191

» Physical and Chemical Changes

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MCQ▾

Question

Which of the following is true about chemical changes?

Choices

Choice (4) Response

a.

Chemical changes involve irreversible chemical reaction.

b.

Rearrangement of the atoms of one or more substances.

c.

Change in the chemical properties of the substance.

d.

All a. , b. and c. are correct

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