NSO Level 1- Science Olympiad (SOF) Class 9: Questions 853 - 859 of 1128

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Question 853

Question

MCQ▾

If the valency of and the valency of . The formula for Magnesium chloride is

Choices

Choice (4)Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

Question 854

Question

MCQ▾

The orbits or shells around the nucleus in an atom is called

Choices

Choice (4)Response

a.

Isobars

b.

Isotopes

c.

Energy level

d.

None of the above

Question 855

Question

MCQ▾

Which of these multiply very slowly?

Choices

Choice (4)Response

a.

Worms

b.

Bacteria

c.

Virus

d.

Fungi

Question 856

Question

MCQ▾

Corals are

Choices

Choice (4)Response

a.

Poriferans present at the sea bed

b.

Cnidarians that live in colonies

c.

Poriferans attached to some solid support

d.

Cnidarians that are solitary living

Question 857

Question

MCQ▾

The value of is ________.

Choices

Choice (4)Response

a.

3

b.

2

c.

0

d.

5

Question 858

Question

MCQ▾

35 persons can repair a road in 10 days, working 3 hours a day. In how many days will 30 persons, working 7 hours a day, complete the work?

Choices

Choice (4)Response

a.

3

b.

9

c.

7

d.

5

Question 859

Question

MCQ▾

If we try to fill more and more gas in a balloon it bursts out. This is because

Choices

Choice (4)Response

a.

Air has weight

b.

Air needs no space

c.

Air exerts pressure on the walls of the balloons

d.

Air has a fixed volume

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