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Direction: Read the following passage and fill up blank (22) with correct option.
They extinguish fire by cutting the supply of__(21)__. Oxygen is needed for anything to __(22)__. So, if the supply of oxygen is cut off, the fire stops. For this, these cylinders contain carbon dioxide in form of __(23)__. These cylinders are commonly known as fire __(24)__.
  • a)
    cool                             
  • b)
    burn          
  • c)
    read                            
  • d)
    learn
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Direction: Read the following passage and fill up blank (22)with corre...
Oxygen is needed for anything to burn. 
This question is part of UPSC exam. View all Class 4 courses
Most Upvoted Answer
Direction: Read the following passage and fill up blank (22)with corre...
Explanation:
The correct answer for blank (22) is option 'b) burn'.

Reasoning:
- Fire requires three elements to burn: fuel, oxygen, and heat. These three elements make up the fire triangle.
- Oxygen is one of the key elements required for combustion. It supports the chemical reaction that takes place during burning.
- When the supply of oxygen is cut off, the fire cannot continue to burn as it lacks the necessary element for combustion.
- Fire extinguishers work by eliminating one or more elements of the fire triangle. In this case, they cut off the supply of oxygen to extinguish the fire.
- Fire extinguishers contain a substance, such as carbon dioxide, which is released when the extinguisher is activated. This substance displaces the oxygen, creating an oxygen-deficient environment that suffocates the fire.
- Carbon dioxide is commonly used in fire extinguishers because it is a non-flammable gas that does not support combustion.
- When carbon dioxide is released from the extinguisher, it creates a blanket of gas that covers the fire, effectively cutting off the supply of oxygen and smothering the flames.
- By cutting off the supply of oxygen, the fire is unable to continue burning and is extinguished.

Therefore, the correct option for blank (22) is 'b) burn'.
Community Answer
Direction: Read the following passage and fill up blank (22)with corre...
The question is not even correct
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Direction: Read the following passage and fill up blank (22)with correct option.They extinguish fire by cutting the supply of__(21)__. Oxygen is needed for anything to __(22)__. So, if the supply of oxygen is cut off, the fire stops. For this, these cylinders contain carbon dioxide in form of __(23)__. These cylinders are commonly known as fire __(24)__.a)cool b)burnc)read d)learnCorrect answer is option 'B'. Can you explain this answer?
Question Description
Direction: Read the following passage and fill up blank (22)with correct option.They extinguish fire by cutting the supply of__(21)__. Oxygen is needed for anything to __(22)__. So, if the supply of oxygen is cut off, the fire stops. For this, these cylinders contain carbon dioxide in form of __(23)__. These cylinders are commonly known as fire __(24)__.a)cool b)burnc)read d)learnCorrect answer is option 'B'. Can you explain this answer? for Class 4 2024 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about Direction: Read the following passage and fill up blank (22)with correct option.They extinguish fire by cutting the supply of__(21)__. Oxygen is needed for anything to __(22)__. So, if the supply of oxygen is cut off, the fire stops. For this, these cylinders contain carbon dioxide in form of __(23)__. These cylinders are commonly known as fire __(24)__.a)cool b)burnc)read d)learnCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 4 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: Read the following passage and fill up blank (22)with correct option.They extinguish fire by cutting the supply of__(21)__. Oxygen is needed for anything to __(22)__. So, if the supply of oxygen is cut off, the fire stops. For this, these cylinders contain carbon dioxide in form of __(23)__. These cylinders are commonly known as fire __(24)__.a)cool b)burnc)read d)learnCorrect answer is option 'B'. Can you explain this answer?.
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