Chemistry Experiment with Sulfuric Acid and Ethylene Gas

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Questions and Answers

What is the most important use of alkanes?

Fuel

Describe the color of the flame produced during complete combustion of methane.

Blue

What is the color of bromine water, and how does it change when exposed to sunlight in the presence of an alkane?

Yellow orange; decolorizes

Explain the color of the flame produced during incomplete combustion of methane.

Yellow Signup and view all the answers

Why are alkanes not soluble in strong acids or bases?

Because they are nonpolar Signup and view all the answers

What type of bonds do unsaturated hydrocarbons contain?

Double or triple bonds Signup and view all the answers

What is the combustion reaction of ethylene?

CH2=CH2 + 3O2 -> 2CO2 + 2H2O + heat Signup and view all the answers

What happens when ethylene reacts with bromine in the presence of sunlight?

CH2=CH2 + Br2 + sunlight -> CH2-CH2 Br Br Signup and view all the answers

What is the Baeyer’s test used for in the context of unsaturated hydrocarbons?

A qualitative test for the presence of unsaturation. Signup and view all the answers

What is the color of gas produced by the incomplete combustion of methane?

Colorless Signup and view all the answers

What is the odor of the gas produced by the incomplete combustion of methane?

Odorless Signup and view all the answers

What is the color of the flame when methane undergoes complete combustion?

Blue flame Signup and view all the answers

What type of hydrocarbons are alkanes and what is their characteristic formula?

Alkanes are open-chain saturated hydrocarbons containing only carbon-carbon single bonds. Their formula follows the pattern CnH2n+2. Signup and view all the answers

Describe the reactivity of alkanes at room temperature.

Alkanes are chemically inert or non-reactive at room temperature. Signup and view all the answers

What are unsaturated hydrocarbons and give examples of each type?

Open-chain unsaturated hydrocarbons containing one or more double or triple bonds are called alkenes and alkynes, respectively. Ethylene and acetylene are representative examples. Signup and view all the answers

Explain the reaction of alkenes with bromine.

Alkenes decolorize bromine water, turning it from orange to colorless, due to addition reactions across the double bond. Signup and view all the answers