NSO Level 1- Science Olympiad (SOF) Class 8: Questions 610 - 614 of 1178
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Question 610
Question MCQ▾
Hydrogen can be considered as the cleanest fuel. The explanation is
Choices
Choice (4) | Response | |
---|---|---|
a. | Hydrogen is an inflammable gas. | |
b. | Unlike carbon fuels, it does not produce any harmful bi products on burning. | |
c. | It burns in oxygen to form pure water. | |
d. | All a., b. and c. are correct |
Question 611
Question MCQ▾
Some uses of metals and non-metals are given here. Arrange them properly.
- Making utensils, bells, electric wires, ornaments etc.
- Production of fertilizers
- Production of crackers
- In water purification process
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 and 3 metals, 2 and 4 non-metals | |
b. | 1 metals, 2,3 and 4 non-metals | |
c. | 1 and 2 metals, 3 and 4 non-metals | |
d. | 1 and 2 non-metals, 3 and 4 metals |
Question 612
Question MCQ▾
Carbon fuels are harmful to health. The reason behind this statement is
Choices
Choice (4) | Response | |
---|---|---|
a. | Carbon fuels release unburnt carbon particles | |
b. | Incomplete combustion of carbon fuels produce carbon monoxide | |
c. | Unburnt carbon particles cause respiratory diseases | |
d. | All a., b. and c. are correct |
Question 613
Question MCQ▾
The non-metal used in vulcanization
Choices
Choice (4) | Response | |
---|---|---|
a. | Carbon | |
b. | Silica | |
c. | Sulphur | |
d. | Phosphorus |
Passage
Observe the figures (a) & (b) carefully and answers below.
Question 614 (1 of 3 Based on Passage)
Question MCQ▾
The reproduction taking place in the given figures are an example of
Choices
Choice (4) | Response | |
---|---|---|
a. | Metamorphosis | |
b. | Asexual reproduction | |
c. | Sexual reproduction | |
d. | None of the above |