Mixtures

What term in Chemistry where in a compound made up of two or more chemical components that are not chemically linked?

• Element

• Compound

• Mixture

• Pure Substance

A mixture is a physical blend of two or more substances that preserve their identities and are blended many form. Select the three forms of a Mixtures that are given below.

• Solutions

• Suspensions

• Colloids

• Vapor

The properties of mixtures are listed below. Which is NOT describes the properties of Mixtures?

• The separation of components can be easily done.

• The components of a mixture each keep their original properties.

• They are made up of two or more substances that are chemically combined with each other.

• The proportion of the components is variable.

A type of Mixture that possess different properties and compositions in various parts

i.e. the properties are not uniform throughout the mixture.

A type of Mixture that can be defined as the mixtures which

possess the same properties and combination throughout their mass.

What method of separating of mixtures utilize picking out all the unwanted substances by hand and separating them from useful ones.

• Threshing

• Winnowing

• Sieving

• Handpicking

What method of separating of mixtures is mostly done during the harvesting of crops. Normally, the stalks of the wheat are dried once it is harvested. The grain is then separated from the stalks and grounded into the floor by beating the dry stalks to shake off the dried grains.

• Threshing

• Winnowing

• Sieving

• Handpicking

A method of separating mixtures that is carried out with the help of wind or blowing air.

• Threshing

• Winnowing

• Sieving

• Handpicking

What method of separating of mixtures is done to separate mixtures that contain substances mostly of different sizes. The mixture is passed through the pores of the sieve. All the smaller substances pass through easily while the bigger components of the mixture are retained.

• Threshing

• Winnowing

• Sieving

• Handpicking

What is the technique that is used in separating a mixture, usually a solution of a solvent and a soluble solid. In this method, the solution is heated until the organic solvent evaporates where it turns into a gas and mostly leaves behind the solid residue.