Science
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451
Which planet is known as the 'Jewel of the Solar System'?
Easy
Science
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452
Who won the first Nobel Prize in Physics?
Hard
Science
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453
Which element is added to steel to make it 'Stainless Steel'?
Medium
Science
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454
Which organ in the human body produces bile?
Medium
Science
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455
Who invented the first functional telephone?
Easy
Science
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456
Which vitamin deficiency causes Night Blindness?
Easy
Science
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457
Who discovered the laws of gravity?
Easy
Science
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458
What is the study of birds called?
Medium
Science
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459
Which gas is used in fire extinguishers?
Medium
Science
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460
Which gas is used for the purification of water?
Medium
Science
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461
Which layer of the atmosphere is closest to the Earth's surface?
Medium
Geography, Science
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462
Which gas is most abundant in the Sun?
Medium
Science
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463
Which chemical element has the symbol 'Fe'?
Easy
Science
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464
Which vitamin is also known as the 'Sunshine Vitamin'?
Easy
Science
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465
Which organ in the human body is responsible for pumping blood?
Easy
Science
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