NSO Level 1- Science Olympiad (SOF) Class 8: Questions 532 - 538 of 1076

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Question number: 532

» Metals and Non-Metals

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MCQ▾

Question

Iron is used in construction work in RCC and making grills. Which property of metals is used here?

Choices

Choice (4) Response

a.

Ductility

b.

Malleability

c.

Hardness and strength

d.

Both b. and c. are correct

Question number: 533

» Metals and Non-Metals

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MCQ▾

Question

This metal reacts with dilute sulphuric acid and release hydrogen

Choices

Choice (4) Response

a.

Gold

b.

Silver

c.

Copper

d.

Magnesium

Question number: 534

» Metals and Non-Metals

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MCQ▾

Question

Which of the following metals does not react with concentrated hydrochloric acid?

Choices

Choice (4) Response

a.

Potassium

b.

Iron

c.

Copper

d.

Zinc

Question number: 535

» 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

Raju’s family donated their old TV, Fridge, Washing Machine and Computer to a poor family in the village.

Choices

Choice (4) Response

a.

Recycle

b.

Reuse

c.

Recover

d.

Reduce

Question number: 536

» Metals and Non-Metals

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MCQ▾

Question

Which of the following is the most reactive metal?

Choices

Choice (4) Response

a.

Sodium

b.

Silver

c.

Copper

d.

Gold

Passage

Read the description carefully and answer the questions. Anjali was doing an experiment. She took a dish. Placed two lighted candles in it. One long and the other long. She put some baking soda in the dish and placed it in a bowl. The she poured some vinegar in the dish.

Question number: 537 (1 of 6 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

What do you think about the bubbles?

Choices

Choice (4) Response

a.

It is oxygen gas

b.

It is carbon dioxide gas

c.

It is heat

d.

It is hydrogen gas

Question number: 538 (2 of 6 Based on Passage) Show Passage

» Combustion and Flame

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MCQ▾

Question

In the above experiment, the candles get extinguished. What do this indicate?

Choices

Choice (4) Response

a.

Presence of gas

b.

Presence of gas

c.

Presence of gas

d.

Question does not provide sufficient data or is vague

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