concrete is heterogeneous mixture. Ingredients in concrete are cement, sand, aggregates,and water. These are mixed based on mix design.
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Concrete is a heterogeneous mixture, not a solution or colloid. It is made up of various components like cement, water, and aggregates, which are mixed together but do not form a uniform distribution at a microscopic level.
Pond water is not a pure substance.
Concrete is a mixture, not a pure substance. It is made up of various substances such as cement, water, aggregates (sand, gravel), and additives. Each of these components retains its own properties and can be physically separated from the others.
Wood is a heterogeneous mixture composed of different compounds such as cellulose, lignin, and hemicellulose.
If you put it under a microscope, you will be able to see the heterogenous mixture form into different parts. Opposed to this, the homogenous mixture will look similar throughout the entire mixture - also when put under a microscope.