Acetylene
Acetylene is an unsaturated chemical molecule that has the formula C2H2 for its molecular structure. It consists of two carbon atoms connected by a 180-degree triple bond and two hydrogen atoms bonded to carbon atoms. Pure ethanol is used as a fuel and is dangerous. It is odourless and colourless, but industrial grade typically has an odd odour due to impurities such as phosphine and divinyl sulphide.
Acetylene Formula Chemistry Questions with Solutions
Q1. What is the formula of acetylene?
Answer: C2H2
Acetylene is the lowest Alkyne. Alkyne is an unsaturated hydrocarbon with a triple bond in between two carbons.
CH≡CH or C2H2
Q2. What is the molecular weight of acetylene?
Answer: 26.4 g/mol
Q3. How many rotatable bonds are there in acetylene?
Answer: Zero
Q4. How many bonds does acetylene have?
Answer: 3 σ and 2 π bonds
Q5. What is acetylene made of?
Answer: Acetylene is an organic molecule with the formula C2H2. It consists of two carbon atoms connected by a 180-degree triple bond and two hydrogen atoms bonded to carbon atoms.
Q6. What is the IUPAC name of acetylene?
Answer: The IUPAC name of acetylene is ethyne.
Q7. What are the characteristics of acetylene?
Answer:
- Acetylene is an organic molecule having the formula C2H2.
- It is an odourless gas that smells faintly like garlic.
- It exhibits a sooty flame.
- It contains zero rotatable bonds.
- It has three bonds and two bonds.
Q8. How can we synthesise acetylene?
The following are methods for synthesising acetylene:
- Partial combustion of methane (CH4)
- Hydrolysis of calcium carbide (CaC2).
- Dehydrohalogenation of alkyl dihalides (CH2X2).
- Dehydrohalogenation of vicinal dihalides.
Q9. How many bonds does acetylene have?
Answer: Acetylene has three σ (2 C-H bonds and 1 C-C bond) and two π (between 2 carbon atoms) bonds.
Q10. What are the applications of acetylene?
Answer: Pure acetylene is used as a fuel and is hence toxic. Listed below are several applications of acetylene.
- It is used in welding.
- It is used in the manufacturing of polymers and acrylic acid derivatives.
- It is used to create portable lights.
- It is used in the manufacture of polyacetylene, the first natural semiconductor.
- It is used in radiocarbon dating.
Q11. What is the shape of acetylene?
Answer: Acetylene is a linear molecule with two carbon atoms triple-bonded at 180 ° and two hydrogen atoms linked to the carbon atoms.
Q.12 What does acetylene react with?
Answer: Acetylene combines with active metals (such as copper, silver, and mercury) to generate acetylide compounds that are explosive.
Q.13 Does acetylene react with water?
Answer: The reaction between acetylene and water produces acetaldehyde (CH3CHO). In this reaction, mercury(II) salt can serve as the catalyst in an acidic media.
Q.14 Why is acetylene not soluble in water?
Answer: If created, the intermolecular H-bonding between water molecules is stronger than that between water molecules and acetylene molecules. Therefore, acetylene does not create H-bonds with water. Consequently, acetylene is not soluble in water.
Q.15 What type of gas is acetylene?
Answer: The gas acetylene is odourless and colourless. The stench of commercial-grade acetylene may resemble that of ether or garlic. It is utilised for welding, cutting, brazing, and soldering, as well as the production of other chemicals. Acetylene is transported and dissolved in acetone or dimethylformamide under pressure.
Q.16 Is acetylene a toxic gas?
Answer: In standard industrial practice, acetylene is not regarded as a significant hazardous danger. However, it poses a significant fire and explosive risk. The literature contains numerous tales of deaths caused by acetylene explosions. Simply put, acetylene is an asphyxiant.
