NSO Level 1- Science Olympiad (SOF) Class 9: Questions 819 - 823 of 1123
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Question number: 819
Question
Rita read in the newspaper that a lady had severely burnt when she sprayed perfume while cooking. What could be the possible reason?
Choices
Choice (4) | Response | |
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a. | Estors are highly volatile |
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b. | Perfume contain estor which is highly inflammable |
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c. | Estors diffuse very quickly in air. |
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d. | All a. , b. and c. are correct |
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Question number: 820
Question number: 821
Question
Providing a clean environment can prevent
Choices
Choice (4) | Response | |
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a. | water-borne diseases |
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b. | vector-borne diseases |
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c. | sexually transmitted diseases |
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d. | air-borne diseases |
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