NSO Level 1- Science Olympiad (SOF) Class 8: Questions 521 - 526 of 1076

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Question number: 521

» Synthetic Fibres and Plastics

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MCQ▾

Question

We are familiar with the four R’s used in environment protection. Identify the R used in the situations

Thermocol can be changed into useful products like artificial clay and gum by treating with acetone, orange oil etc. This method is called

Choices

Choice (4) Response

a.

Recovering

b.

Reusing

c.

Recycling

d.

Reducing

Passage

Image of Linear and Cross-linked Arrangement

Image of Linear and Cross-Linked Arrangement

Image of Linear and Cross-linked Arrangement

Question number: 522 (1 of 2 Based on Passage) Show Passage

» Synthetic Fibres and Plastics

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MCQ▾

Question

Example of figure (B) is

Choices

Choice (4) Response

a.

Vulcanised rubber

b.

Teflon

c.

Polythene

d.

None of the above

Question number: 523 (2 of 2 Based on Passage) Show Passage

» Synthetic Fibres and Plastics

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MCQ▾

Question

Example of figure (A) is

Choices

Choice (4) Response

a.

Melamine

b.

Bakelite

c.

Vulcanised rubber

d.

Teflon

Question number: 524

» Synthetic Fibres and Plastics

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MCQ▾

Question

Bakelite is used to make the handles of kitchenware. The property helping this is

Choices

Choice (4) Response

a.

It can be bend easily

b.

It gets deformed easily.

c.

It can resist heat and can tolerate higher temperature than plastic.

d.

Question does not provide sufficient data or is vague

Question number: 525

» Synthetic Fibres and Plastics

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MCQ▾

Question

Identify the names from the given clues

Which of the following statements show the benefits of blended fabrics?

Choices

Choice (4) Response

a.

Increases the durability

b.

Improves the appearance of the fabric

c.

Makes the maintenance easy

d.

All a. , b. and c. are correct

Question number: 526

» Metals and Non-Metals

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MCQ▾

Question

Science teacher gave a task to VIII standard students. She divided the class into four groups. She kept four covered boxes made of wood, cardboard, thermocol and metal on the other side of the ground and blind folded one student each from the groups and gave them long sticks. One by one they were allowed to go to the boxes and asked them to find out which of them is a metal box. Which property of metals can help them to win the task?

Choices

Choice (4) Response

a.

Metals are sonorous

b.

Metals are lustrous

c.

Metals are malleable

d.

Metals are ductile

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