Which of the following carbon compounds is most likely to burn with a non-luminous flame?
Ethanol
A flame appears luminous only when unburnt carbon particles glow within it; complete combustion removes these particles and yields a clean, non-luminous flame.
Ethanol, \(C_{2}H_{5}OH\), already carries oxygen inside the molecule, so it undergoes almost complete combustion and burns with a pale, non-luminous blue flame.
Charcoal is mostly elemental carbon, and camphor and kerosene are hydrocarbons rich in carbon; all three release incompletely burnt carbon that glows, producing a bright yellow luminous flame with soot.
Hence, the compound most likely to burn with a non-luminous flame is ethanol.
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Refer to the two statements given below and choose the CORRECT option.
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Important Questions from Chemistry in Everyday Life
Consider the following statements and select the correct option.
Statement A: Plants require specific soil pH for proper growth.
Statement B: Farmers use pH values to decide the type of fertiliser to add.Consider the following statements and select the correct option.
Statement A: Sugarcane juice can be fermented to give alcohol (ethanol).
Statement B: Alcohol is added to petrol because it is a cleaner fuel.
- At what pH does tooth decay begin to occur in the human mouth?
- Read the following statements carefully and select the correct option. Assertion (A): Keeping oily food in airtight containers prevents rancidity. Reason (R): Airtight containers slow down the oxidation of fats and oils.
Which of the following statement(s) about the artificial sweeterning agents is/are TRUE?
1. Ortho-sulphobenzimide is the first popular artificial sweetening agent.
2. Ortho-sulphobenzimide is also called as saccharin.
3. Ortho-sulphobenzimide is about 100 times as sweet as cane sugar.Choose the correct answer from the options given below:
