Question

Some words (underlined) in the following sentences are jumbled up. Write them in their correct form.

$\left(\mathrm{a}\right)$ Seldie is a combustible substance.

$\left(\mathrm{b}\right)$ Slags is a non-combustible material.

$\left(\mathrm{c}\right)$ Chittsmack does not burn by itself.

$\left(\mathrm{d}\right)$ Some substances on combustion produce thea and mafel.

$\left(\mathrm{e}\right)$The amount of heat energy produced on complete combustion of $1$kg of a fuel is called its Aricolci uelav.

Answer 1

Part (a): Seldie is a combustible substance.

• Diesel is a combustible substance:
• Combustible compounds are substances that react with oxygen to produce heat and light.
• Diesel fuel is a liquid fuel that is suitable for use in automobiles and other compression ignition engines.
• A liquid must have a flash point of $60°\mathrm{C}$ and a boiling temperature of $100°\mathrm{C}$ to be combustible. This is the range in which diesel fuel operates.

Part (b): Slags is a non-combustible material.

• Glass is a non-combustible material:
• When exposed to fire or heat, a non-combustible substance will not ignite, burn, sustain combustion, or release flammable gases in the form in which it is used and at the conditions expected.
• Because glass is silicon oxide, it is not flammable, and extremely difficult to make it burn. Silicon dioxide has been burned and cannot be burned again.

Part (c): Chittsmack does not burn by itself.

• Matchstick does not burn by itself:
• Because the temperature of the match stick is lower than the ignition point, it will not burn on its own.
• When a match stick strikes the walls of a matchbox, enough heat is generated by friction to raise the ignition temperature of the chemicals on the match stick, causing it to burn.

Part (d): Some substances on combustion produce thea and mafel.

• Some substances on combustion produce heat and flame:
• Combustion is a chemical reaction that occurs when fuel (hydrocarbon) and oxygen come into contact.
• When fuel and oxygen react, heat and light energy are released. The flame is created by combining heat and light energy.

Part (e): The amount of heat energy produced on complete combustion of $1$kg of a fuel is called its Aricolci uelav.

• The amount of heat energy produced on complete combustion of $1$kg of a fuel is called its calorific value:
• Full combustion of a specific quantity at constant pressure and under normal conditions is used to calculate the amount of heat energy present in the fuel. It is also known as calorific power.
• The calorific value of fuel determines its efficiency. If the value is high, then the efficiency will be high as well. If the value is low, the efficiency will suffer as well. The efficiency of a product is directly related to its calorific value.