Gold is a precious metal, and it is commonly used in jewelry and other decorative items. It is known for its distinct yellow color and its resistance to corrosion. However, pure gold is too soft to be used in its pure form, so it is often mixed with other metals to increase its strength and durability. This mixture is referred to as an alloy, and one common type of gold alloy is 22 carat gold.

The term "carat" is used to measure the purity of gold. Pure gold is 24 carat, but when it is mixed with other metals, such as copper or silver, the carat value decreases. Therefore, 22 carat gold means that it contains 22 parts of pure gold and 2 parts of other metals. This mixture gives the gold alloy its characteristic properties, including its color and durability.

Rectified spirit, also known as rectified alcohol or neutral spirit, is a type of alcohol that has been purified through a process of distillation. It is a clear, colorless liquid and is often used as a solvent or as a base for the production of alcoholic beverages. Rectified spirit is considered a homogeneous mixture because its composition is uniform throughout, with no visible separation of its components.

Gasoline, also known as petrol, is a common fuel used in automobiles and other internal combustion engines. It is a mixture of various hydrocarbons, such as octane, heptane, and ethanol, along with additives to enhance its performance. Gasoline is also considered a homogeneous mixture because its composition is uniform, and its components are evenly distributed throughout.

Iodized table salt is a type of salt that has been fortified with iodine, an essential nutrient for human health. It is commonly used as a seasoning in cooking and is known for its characteristic salty taste. Iodized table salt is also a homogeneous mixture because its composition is uniform, and the iodine is evenly distributed throughout the salt crystals.

In summary, among the options provided, rectified spirit, gasoline, and iodized table salt are all examples of homogeneous mixtures. However, 22 carat gold is a heterogeneous mixture because it is an alloy composed of two or more substances with distinct properties and visible differences.

None of the above, i think