NSO Level 1- Science Olympiad (SOF) Class 10: Questions 227 - 231 of 986

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Passage

Read the following passage and answer the question.

The X elements are located in-group VIIA of the periodic table, which is the second-to-last column of the chart.

Elements are highly reactive non-metals and highly electronegative, with high electron affinities.

Question 227 (3 of 3 Based on Passage)

Question

MCQ▾

Which is not a halogen element?

Choices

Choice (4)Response

a.

Iodine

b.

Fluorine

c.

Sodium

d.

Bromine

Question 228

Question

MCQ▾

Parallel evolution occurs when

Choices

Choice (4)Response

a.

Related spaces evolve similar features independently

b.

One ancestral stock evolves into two species

c.

Natural selection that favors same structure in different ancestors

d.

None of the above

Question 229

Question

MCQ▾

Blood travels twice through the heart in one complete cycle of the body called

Choices

Choice (4)Response

a.

Double Circulation

b.

Pulmonary Circulation

c.

Systemic circulation

d.

Question does not provide sufficient data or is vague

Question 230

Question

MCQ▾

Read the given statements and mark the correct option.

Statement 1: Biogas is primarily methane and carbon dioxide and hydrogen sulphide

Statement 2: Petroleum, coal and natural gas are fossil fuels.

Choices

Choice (4)Response

a.

Only statement 2 is correct

b.

Statements 1 and 2 are incorrect

c.

Only statement 1 is correct

d.

Statements 1 and 2 are correct

Question 231

Question

MCQ▾

Choose correct option for heart?

Choices

Choice (4)Response

a.

The lower chambers are called ventricles

b.

The upper chambers are called atria

c.

Ventricles pump blood to the different organs

d.

All a., b. and c. are correct

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