Tag: all about mixtures
Questions Related to all about mixtures
A solution is a homogenous mixture of a solute in a solvent.
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True
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False
A homogenous mixture of two gases is :
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Brass
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Graphite
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Air
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Nitrogen
The air that we breathe is a homogeneous mixture of oxygen, nitrogen, argon, and carbon dioxide, along with other elements in smaller amounts. Because each layer of the Earths atmosphere has a different density, each layer of air is its own homogeneous mixture.
In construction of a building, which of the following is used?
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Water
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Cement
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Both A and B
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None of these
In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.
Note that a mixture:
- consists of two or more different elements and/or compounds physically intermingled,
- can be separated into its components by physical means, and
- often retains many of the properties of its components.
Which of the following are related to apple juice ?
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element
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mixture
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compounds
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none of these
Apple juice is a fruit juice made by the maceration and pressing of apples.
so its a mixture.
Which one is true solution :
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sugar sol
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Blood
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starch
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ink
True Solution is a homogeneous mixture of two or more substances in which substance dissolved (solute) in solvent has the particle size of less than 10-9 m or 1 nm. Simple solution of sugar in water is an example of true solution. Particles of true solution cannot be filtered through filter paper and are not visible to naked eye.
Colloidal Solution is a heterogeneous mixture in which particle size of substance is intermediate of true solution and suspension i.e. between 1-1000 nm. Smoke from a fire is example of colloidal system in which tiny particles of solid float in air. Just like true solutions, Colloidal particles are small enough and cannot be seen through naked eye.They easily pass through filter paper. But colloidal particles are big enough to be blocked by parchment paper or animal membrane.
blood, starch, ink : Colloidal Soln.
sugar sol., salt sol : true soln.
Particles of true solution are visible to naked eye.
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True
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False
Property | True Solution | Colloidal Solutions | Suspension |
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Size of the particles | < 1nm | 1 1000nm | >1000nm |
Nature | Homogeneous | Heterogeneous | Heterogeneous |
Filterability Diffusion through parchment paper | Particles of true Solution diffuse rapidly through filter paper as well as parchment paper. | Colloidal particles pass through filter paper but not through parchment paper. | Suspension particles do not pass through filter paper and parchment paper. |
Visibility | Particles of True Solution are not visible to naked eye. | Colloidal particles are not seen to naked eye but can be studied through ultra microscope. | Suspension particles are big enough to be seen by naked eye. |
Tyndall effect | True Solution does not show Tyndall effect. | Colloids shows Tyndall effect. | Suspension may or may not show Tyndall effect. |
Appearance | Transparent | Translucent | Opaque |
Among the following, name a mixture which is used as a food ?
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Milk
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Butter
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Jelly
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All of the above
In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. A mixture refers to the physical combination of two or more substances on which the identities are retained and are mixed in the form of solutions, suspensions, and colloids.
Note that a mixture:
- consists of two or more different elements and/or compounds physically intermingled,
- can be separated into its components by physical means, and
- often retains many of the properties of its components.
Compare true solution, suspension and colloids based on particle size is less than 1nm in :
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suspension
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colloids
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true solution
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both A and B
Property | True Solution | Colloidal Solutions | Suspension |
---|---|---|---|
Size of the particles | < 1nm | 1 1000nm | >1000nm |
Of the following substance which is an element, a mixture and a compound?
Sea water is the example of :
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element
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mixture
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compounds
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all of these
A mixture is a material system made up of two or more different substances which are mixed but are not combined chemically. Seawater is a complex mixture of 96.5 percent water, 2.5 percent salts, and smaller amounts of other substances, including dissolved inorganic and organic materials, particulates, and a few atmospheric gases.
Which of the following is a homogeneous mixture?
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Milk
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Steel
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Smoke
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Soil
A heterogeneous mixture is composed of components that are not uniform and have different properties. Milk, soil, smoke are the heterogeneous mixture.