Explanation

• The chemical formula of ethyne is C₂H₂.
• Ethyne is the simplest alkyne.
• It is contains a triple bond between two carbon atoms.
• It is also commonly known as acetylene.
• It is a colorless, highly flammable gas.

Additional information:

• Methane → CH₄ (Alkane)
• Ethene → C₂H₄ (Alkene)
• Propene → C₃H₆
• Propyne → C₃H₄

Last verified on 11-07-2026

Explanation

• Stearic acid is a saturated fatty acid containing 18 carbon atoms (C18:0).
• It has no double bonds between carbon atoms, which makes it saturated.
• It is commonly found in animal fats and some vegetable fats.

Additional information:

• Palmitic acid – Saturated fatty acid (C16:0)
• Oleic acid – Unsaturated fatty acid (C18:1)
• Linoleic acid – Unsaturated fatty acid (C18:2)
• Linolenic acid – Unsaturated fatty acid (C18:3)

Last verified on 11-07-2026

Explanation

• Chemical Name: Acetic Acid (Ethanoic Acid)
• Chemical Formula: CH₃COOH
• Vinegar Concentration: 4–8% Acetic Acid
• Type of Acid: Weak Organic Acid
• Uses: Food seasoning, pickling, preservation, cleaning

Last verified on 10-07-2026

Explanation

• Raw Materials: Ammonia (NH₃) and Carbon Dioxide (CO₂)
• Chemical Formula: CO(NH₂)₂
• Nitrogen Content: 46%
• Type: Nitrogen fertilizer
• Industrial Process: Bosch–Meiser process

Last verified on 09-07-2026

Explanation

• The pH value of pure water at room temperature is 7.
• A pH of 7 means the solution is neutral.
• Pure water contains equal amounts of H⁺ and OH⁻ ions.
• The pH scale ranges from 0 to 14.
• Room temperature is approximately 25°C.

Explanation

• Carbon dioxide (CO₂) is used in fire extinguishers.
• It extinguishes fire by displacing oxygen and cooling the burning material.
• CO₂ fire extinguishers are especially effective for electrical and flammable liquid fires.
• Carbon dioxide is a colorless and non-flammable gas.
• It leaves no residue after use.

Last verified on 09-07-2026

Explanation

• Freezing Point: 0°C
• Fahrenheit: 32°F
• Kelvin: 273.15 K

Additional information:

• Boiling Point: 100°C (212°F or 373.15 K)
• Standard Atmospheric Pressure: 1 atm (760 mmHg)

Last verified on 06-07-2026

Explanation

• Boiling point of water: 100°C
• Freezing point of water: 0°C
• Standard atmospheric pressure: 1 atm (760 mmHg)
• 0°C = 32°F
• 100°C = 212°F

Last verified on 06-07-2026

Explanation

• Sir James Chadwick discovered the neutron in 1932.
• He was a British physicist.
• His discovery completed the basic picture of the atomic nucleus.
• He received the Nobel Prize in Physics in 1935 for this discovery.

Additional information:

• J. J. Thomson – Electron (1897)
• Ernest Rutherford – Atomic nucleus (1911) and Proton (1917)

Last verified on 03-07-2026

Explanation

• During a physical change, the chemical composition of a substance does not change.
• Only the state, shape, or size may change.
• No new substance is formed.
• Examples include melting, freezing, and boiling.

Last verified on 25-06-2026