Chemistry

What is organic chemistry?

Organic chemistry is the branch of chemistry that studies the structure, properties, composition, reactions, and synthesis of carbon-containing compounds.

Alkene

Alkenes are unsaturated hydrocarbons that contain at least one carbon-carbon double bond (C=C). They follow the general formula CnH2n and are known for their reactivity due to the presence of the double bond.

Alkane

Alkanes are saturated hydrocarbons containing only single carbon-carbon bonds, following the general formula CnH2n+2.

Fractional Distillation

Fractional distillation is a separation technique used to separate a mixture of liquids with different boiling points into its individual components.

What is incomplete combustion?

Incomplete combustion occurs when there is not enough oxygen available for a fuel to react completely, resulting in the production of carbon monoxide or soot along with water and carbon dioxide.

What is complete combustion?

Complete combustion occurs when a fuel reacts completely with oxygen, producing carbon dioxide and water as the only products.

Fill in the blank: DNA stands for __________.

deoxyribonucleic acid.

What is the bromine water practical used for?

The bromine water practical is used to test for the presence of unsaturation (double or triple bonds) in organic compounds; alkenes turn bromine water from brown to colorless.

What is a carbon double bond?

A carbon double bond is a type of covalent bond where two carbon atoms share two pairs of electrons, resulting in a stronger bond and shorter distance between the atoms, commonly found in alkenes and other unsaturated organic compounds.

Fill in the blank: The gas practical that tests for the presence of hydrogen involves the use of __________.

a lit splint; a popping sound indicates hydrogen.

Fill in the blank: The practical that tests for the presence of oxygen involves using __________.

a glowing splint; a glowing splint reignites in the presence of oxygen.

Fill in the blank: The practical that tests for the presence of carbon dioxide involves the use of __________.

limewater; carbon dioxide turns limewater cloudy.