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प्रश्न
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
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उत्तर
Milk is a colloidal solution but vinegar is a true solution.
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संबंधित प्रश्न
Solids have definite shape and definite volume.
Liquids have definite shape and definite volume.
Differentiate between an atom and a molecule.
Name the property which allows metals to be hammered into thin sheets.
Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.
State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it.
There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.
- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
How will you test whether a given solution is a colloidal solution ?
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
Define Foam Give one example.
Name the process which can be used to purify an impure sample of copper sulphate.
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
Explain how, impure copper sulphate can be purified by crystallisation.
Which of the following mixture cannot be separated by using water as the solvent ?
A standard sheet of paper is about ______ of atoms thick
Solid is an arrangement of particles ______.
Define the term matter.
