Question

Give Reasons1. Water can be boiled in paper cups. 2. Forest fire can occur naturally. 3. Water cannot be used to control electrical fires. QB. Explain how baking soda helps to stop fire​

Answer 1

Answer:

1. Water can be boiled in paper cups.

Water can be boiled in the paper cup by lowering the pressure, as when the atmospheric pressure is lowered to the value of vapor pressure water will start boiling. Was this answer helpful? Was this answer helpful? As the ignition temperature of paper is 230 Celcius and the boiling point of water is 100 Celcius. Thus it is boiled in a paper cup.

2. Forest fire can occur naturally.

Wildfires occur naturally in areas of dry vegetation. Wildfires are called as a bushfire, desert fire or forest fire depending upon the area in which it occurs. Generally, Naturally occurring forest fires are a part of nature’s ecosystem. The real problem is it is most often man-made.

3. Water cannot be used to control electrical fires.

Water is a good conductor of electricity. Water is a natural conductor of electricity and if you throw water on an electrical fire, you can get shocked or electrocuted. Also, water may enable fire to spread by conducting electricity throughout the room and potentially igniting flammable materials. If it is used it may harm those who are trying to douse the fire. Hence, they are not used.

QB. Explain how baking soda helps to stop a fire.

When the knob of the fire extinguisher is pressed, then sulphuric acid mixes with sodium bicarbonate solution and produces a lot ofC02 gas, which forms a blanket over the fire and cuts it off from the supply of the air to the burning substance and the fire stops Soda acid fire extinguisher acts by cutting off the supply of air.

Answer 2

Reasons:-

1. We may boil water in a paper cup while the empty paper easily catches fire because the heat is constantly absorbed by the water, preventing the paper cup from burning.

2. Forest fires are always caused by one of two factors: natural or human-made. Lightning is the most common cause of natural fires, with only a small fraction caused by the spontaneous combustion of dry fuels like sawdust and leaves. Human-caused fires, on the other hand, can occur for a variety of reasons.

3. Water is an electrical conductor, it can easily conduct electric current and cause electric shocks or short circuits. As a result, water cannot be used to put out a fire caused by electrical equipment.

QB. Baking soda releases carbon dioxide, which reduces the oxygen available to the flames.