Question
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 labelled diagram.

Answer

Working: A soda-acid type fire extinguisher contains a solution of sodium hydrogencarbonate and sulphuric acid in separate containers in separate containers inside them. When the knob of the fire extinguisher is pressed, then sulphuric acid mixes with sodium hydrogencarbonate solution to produce carbon dioxide gas which forms a blanket around the burning substance and cuts off the supply of air to burning substance; this stops the process of burning and fire gets extinguished.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

the role of anomalous behaviour of water in preserving aquatic life in regions of cold climate?
What are the objectives of mock drill?
In the surgical method of birth control available for males, the structures A in the reproductive system are cut and ligated (tied up) at both ends. This prevents the reproductive cells B from coming out from the organs C where they are made in the male body. Since B cannot come out from the male body, they cannot fuse with cell D in the body of a female and hence pregnancy is prevented.
  1. What are structures A?
  2. What are cells B?
  3. Name the organs C.
  4. What is cell D?
  5. What is the name of this surgical procedure for birth control available to males?
Compare the properties of ionic compounds and covalent compounds.
When a mixture of gases $X$ and $Y$ is compressed to $300$atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide $($heated to a temperature of $300^\circ C),$ then an organic compounds $Z$ having the molecular formula $CH_4O$ is formed. $X$ is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; $Y$ is a gas which can be made by the action of a dilute acid on an active metal; and $Z$ is a liquid organic compound which can react with sodium metal to produce hydrogen gas:
  1. What are $X, Y$ and $Z?$
  2. Write a balanced chemical equation of the reaction which takes place when $X$ and $Y$ combine to form $Z.$ Indicate the conditions under which the reaction occurs.
Three resistors are connected as shown in the diagram.

Through the resistor $5$ ohm, a current of $1$ ampere is flowing,
  1. What is the current through the other two resistors?
  2. What is the p.d. across $AB$ and across $AC?$
  3. What is the total resistance?
The proportion of carbon atoms in ethanol $(C_2H_5OH)$ and napthalene $(C_{10}H_8)$
What type of changes occurs in a home having chronically ill old person? How will you help to maintain good atmosphere?
Sketch, labell and classify: Frog
Define fossil. Explain importance of fossils as proof of evolution.