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प्रश्न
Name one solid, one liquid and one gaseous non-metal.
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उत्तर
Carbon is a solid non-metal, bromine is a liquid non-metal and oxygen is a gaseous non-metal.
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संबंधित प्रश्न
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
Gases have definite volume but no definite shape.
Name one element, one compound and one mixture.
Name a metal which has no fixed shape.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
Name the process you would use to separate a mixture of water and alcohol.
What is chromatography ? State its two applications.
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
A standard sheet of paper is about ______ of atoms thick
Which among the following is not a matter?
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
Atoms are tiny particles that repel each other when they are squeezed very close.
Gases do not diffuse very easily.
Define the term matter.
Define the term matter.
