NSO Level 1- Science Olympiad (SOF) Class 8: Questions 508 - 513 of 1076

Access detailed explanations (illustrated with images and videos) to 1076 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time!

View Sample Explanation or View Features.

Rs. 450.00 or

How to register?

Question number: 508

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

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

Cotton is an example of a polymer called

Choices

Choice (4)Response

a.

PVC

b.

Polythene

c.

Polycot

d.

Glucose

Question number: 509

» Metals and Non-Metals

Edit
MCQ▾

Question

Which of the following is the least reactive metal?

Choices

Choice (4)Response

a.

Sodium

b.

Gold

c.

Copper

d.

Iron

Question number: 510

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Options are given in the jumbled form. Reshuffle the spellings and identify the correct options.

Polycot is a mixture of

Choices

Choice (4)Response

a.

Yoln, oowl

b.

Oowl, yopetlers

c.

Yopetlers, tocnot

d.

Yoln, tocnot

Question number: 511

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Examples of thermosetting plastic are

  1. Polythene

  2. PVC

  3. Bakelite

  4. Melamine

Choices

Choice (4)Response

a.

3 and 4

b.

2 and 3

c.

1 and 2

d.

1 and 4

Question number: 512

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Some of the most common blended fabrics are given in the questions. Find out the benefit of the blend over individual fabric.

Plastic is not environment friendly. The statements supporting this fact are

  1. It is not biodegradable.

  2. It produces a lot of poisonous gases on burning.

  3. It does not get completely burnt easily.

Choices

Choice (4)Response

a.

1,2 and 3

b.

1 and 2

c.

1 and 3

d.

2 and 3

Question number: 513

» Synthetic Fibres and Plastics

Edit
MCQ▾

Question

Here are some points of difference between thermoplastics and thermosetting plastics. Choose the correct statements.

  1. Thermo plastic get deformed in presence of heat but thermosetting plastic is heat resistant.

  2. Thermoplastic can easily be recycled but Thermosetting plastic cannot be recycled.

  3. Thermoplastic can bend easily but thermosetting plastic when we try to bend it.

Choices

Choice (4)Response

a.

1,2 and 3

b.

1 and 2

c.

1 and 3

d.

2 and 3

Developed by: