Which metal is the most abundant in the Earth's crust? MCQ with Answer and Explanation

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Which metal is the most abundant in the Earth's crust?

A. Aluminum

B. Iron

C. Copper

D. Calcium

Answer: Option A

Solution (By JKSSB Mock Tests)

Aluminum is the most abundant metal in the Earth's crust, making up about 8% of the Earth's solid surface.

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Which scientist is famously associated with the theory of relativity?

A. Albert Einstein

B. Galileo Galilei

C. Niels Bohr

D. Isaac Newton

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Correct Answer: Option A

Explanation:
Albert Einstein formulated the theory of general and special relativity.

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What is the common name for Sodium Bicarbonate?

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Correct Answer: Option A

Explanation:
Sodium Bicarbonate ($NaHCO_3$) is widely known as baking soda.

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Correct Answer: Option D

Explanation:
Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize food.

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