NSO Level 1- Science Olympiad (SOF) Class 9: Questions 638 - 644 of 1123

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Question number: 638

» Chemistry » Structure of the Atom

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MCQ▾

Question

The average atomic mass of an element P with atomic number 35 is 80.006u. The percentage of isotopes with mass numbers 79 and 81 respectively are

Choices

Choice (4) Response

a.

50.3 % and 49.7%

b.

47.9 % and 52.1%

c.

52.1 % and 47.9%

d.

49.7 % and 50.3%

Passage

A boy rides on his bicycle with uniform speed around a rectangular playground of length 25m and breadth 10m. He starts riding from point A and comes back to A after 35 seconds. Answer questions below by observing the figure.

Image of the rectangular

Image of the Rectangular

Image of the rectangular

Question number: 639 (1 of 5 Based on Passage) Show Passage

» Physics » Motion

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MCQ▾

Question

How much time will he save if he takes shortcut through the diagonal of the rectangular play ground to reach the point C?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 640 (2 of 5 Based on Passage) Show Passage

» Physics » Motion

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MCQ▾

Question

Calculate the speed of the bicycle

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 641 (3 of 5 Based on Passage) Show Passage

» Physics » Motion

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MCQ▾

Question

Calculate the displacement of the bicycle from the starting point when it reaches point P

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 642 (4 of 5 Based on Passage) Show Passage

» Physics » Motion

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MCQ▾

Question

Calculate the displacement of the bicycle from the starting point when it reaches point C

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 643 (5 of 5 Based on Passage) Show Passage

» Physics » Motion

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MCQ▾

Question

Calculate the time taken by the boy to reach the point C, if he takes shortcut through the diagonal of the rectangular play ground

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 644

» Biology » Diversity of Living Organisms

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MCQ▾

Question

Elephantiasis is caused by

Choices

Choice (4) Response

a.

Pin worm

b.

Wuchereria

c.

Tape worm

d.

Liverfluke

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