NSO Level 1- Science Olympiad (SOF) Class 8: Questions 601 - 605 of 1076
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Passage
Study the pictures carefully and answer the question
Image of Safety Matchstick
Image of safety Matchstick
Question number: 601 (3 of 6 Based on Passage) Show Passage
Question
The head of the safety match sticks contain potassium chlorate, sulphur and glass powder. Here the role of glass powder is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | It gives necessary friction for combustion |
|
| b. | It acts an oxidiser |
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| c. | It is the fuel for combustion |
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| d. | It ignites the fuel |
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Question number: 602 (4 of 6 Based on Passage) Show Passage
Question
The head of the safety match sticks contain potassium chlorate, sulphur and glass powder. The role of potassium chloride here is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | It gives necessary friction for combustion |
|
| b. | It is the fuel for combustion |
|
| c. | It ignites the fuel |
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| d. | It acts an oxidiser |
|
Question number: 603 (5 of 6 Based on Passage) Show Passage
Question
When matchsticks are struck against rubbing surface, red phosphorous
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Reacts with potassium chlorate |
|
| b. | Ignite antimony disulphide |
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| c. | Converts into white phosphorous |
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| d. | Question does not provide sufficient data or is vague |
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Question number: 604 (6 of 6 Based on Passage) Show Passage
Question
The head of the safety match sticks contain potassium chlorate, sulphur and glass powder. The role of sulphur here is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | It gives necessary friction for combustion |
|
| b. | It acts an oxidiser |
|
| c. | It ignites the fuel |
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| d. | It is the fuel for combustion |
|
Question number: 605
Question
Crackers on ignition produce sound. The reason is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Crackers are explosives |
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| b. | Crackers when ignited move fast and hit on obstacles to produce sound |
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| c. | Explosion is a rapid reaction where heat light and sound are produced |
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| d. | Both a. and c. are correct |
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