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Question 1

Question MCQ▾

Which of the following factors is/are responsible for rifting of Africa՚s plates?

1. The three plates- the Nubian African Plate, Somalian African Plate and Arabian Plate - are separating at different speeds.

2. The Arabian Plate is moving away from Africa at a rate of about an inch per year, while the two African plates are separating even slower, between half an inch to 0.2 inches per year.

Choices

Choice (4)Response

a.

Only 1

b.

Only 2

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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Question 2

Question MCQ▾

Consider the following statements about Quasi Crystals.

1. Quasicrystals are fascinating materials that possess a unique combination of properties. They are a testament to the beauty and power of irregularity in the natural world.

2. They are used in manufacturing non-stick frying pans, needles for acupuncture and surgery, dental instruments and razor blades.

3. The discovery of quasicrystals was made by American- Israeli scientist Dan Shechtman in 1982 in the lab. Dan Shechtman received the 2011 Nobel Prize in Chemistry for discovering quasicrystals.

Which of these statement (s) is/are incorrect?

Choices

Choice (4)Response

a.

3 only

b.

2 and 3

c.

1 and 2

d.

None of the above

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