Fire Extinguisher

Q.

What chemical is present in a fire extinguisher?

Q. Which of the following equations represents the reaction between carbon dioxide and lime water?

1. Carbon dioxide $\left(C{O}_2\right)$ + Lime water $\left[Ca\right(OH{)}_2]\to$ Calcium carbonate $\left(CaC{O}_3\right)$
2. Carbon dioxide $\left(C{O}_2\right)$ + Lime water $\left[Ca\right(OH{)}_2]\to$ Calcium hydrogen carbonate $\left(CaHC{O}_3\right)$ + Water $\left(H_{2}O\right)$
   
3. Carbon dioxide $(CO{2}_{)}$ + Lime water $\left[Ca\right(OH\left)2\right]\to$ Calcium carbonate $\left(CaC{O}_3\right)$ + Hydrogen $\left(H_2\right)$
4. Carbon dioxide $\left(C{O}_2\right)$ + Lime water $\left[Ca\right(OH{)}_2]\to$ Calcium carbonate $\left(CaC{O}_3\right)$ + Water $\left(H_{2}O\right)$

Q. Water cannot be used to extinguish ________.

1. household fires
2. burning paper
3. electrical fires
4. forest fires

Q.

Draw a well labeled diagram of fire extinguisher.

Q. What is the chemical reaction involved in carbon dioxide based fire extinguisher?

Q. Which of the following chemicals are present in a carbon dioxide fire extinguisher?

1. Calcium carbonate
2. Sodium bicarbonte
3. Hydrochloric acid
4. Sulphuric acid

Q. Which of the following statements are true about carbon dioxide fire extinguishers?

1. They do not corrode
2. Can be used to put off fire due to electrical appliances
3. Can be used to put off fire due to oil leaks
4. Hydrochloric acid is present inside the fire extinguisher

Q. In foam extinguisher ______ is present in the bottle

Q. The impurities and salts dissolved in water makes it a conductor of electricity.

1. False
2. True

Q. What does a soda-acid type fire extinguisher contain? How does it work? Explain the working of a soda-acid fire extinguisher with the help of a labeled diagram.

Q.

Name the three main types of fire extinguishers and state the application of each.

Q. What is the chemical reaction involved in carbon dioxide based fire extinguisher?

Q. Which of the following gas is used in fire extinguishers?​

Q. Sodium hydrogen carbonate is used in fire extinguisher.

1. True
2. False

Q. Water may contain salts which:

1. Form ions and conduct electricity
2. Fire resistant
3. Are inflammable
4. All of these

Q. The gas which is responsible for the effervescence when vinegar reacts with baking soda is _______.

1. carbon dioxide
2. oxygen
3. hydrogen
4. nitrogen dioxide

Q. What is the chemical reaction involved in carbon dioxide based fire extinguisher?

Q. With the help of a chemical equation, explain how a soda-acid fire extinguisher helps in putting out a fire.

Q. Which of the component in a fire triangle is the toughest to remove in case of fire?

1. Alkaline

2. Acidified

3. Concentrated sulphuric acid

4. Dilute sulphuric acid

Q. Ethanoic acid was added to sodium carbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported. Identify the correct observation.

1. The gas bums with a pop sound and the flame gets extinguished
2. The gas bums with a pop sound and the flame gets extinguished
3. The flame extinguishes and the gas does not bum.
4. The gas bums with a blue flame and the splinter bums brightly

Q. A compound $A$ is used in fire extinguishers, as an antacid and its small amount is also used in making bakery items. Identify the compound and also explain the reason for above-mentioned uses of the compound $A$.

Q.

if hydrogen is flammble and oxygen helps in combustion so why their compound is ysed for extuingishing fire or why it is not flammable or supporter of combustion