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Differentiate between a glass slab and a glass prism.
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What is ‘rusting’?
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Answer the following question.
List two properties of alloys.
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What is the cause of the dispersion of white light through a glass prism? Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in an inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.
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A student has to trace the path of a ray of light through a glass prism. List four precautions he should observe for better results.
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Galvanisation is a method of protecting iron from rusting by coating it with a thin layer of ____________.
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Amalgam is an alloy of ____________.
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Copper objects lose their shine and form green coating of ____________.
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Which among the following alloys contain mercury as one of its constituents?
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When white light enters a glass prism from the air, the angle of deviation is least for ____________.
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Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
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Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
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The phenomena of light involved in the formation of rainbow are ______.
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The splitting of white light into its component colours is called ____________.
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The diagram shows the reaction between metal and dil. acid.
What is the reason for different behaviour of Mg in test tube B?
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The table shown below gives information about four substances: A, B, C and D.
| SUBSTANCE | MELTING POINT (K) | ELECTRICAL CONDUCTIVITY | |
| SOLID | LIQUID/ AQUEOUS | ||
| A | 295 | Good | Good |
| B | 1210 | Poor | Good |
| C | 1890 | Poor | Good |
| D | 1160 | Poor | Poor |
Identify Ionic compounds from the above given substances.
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Marble’s popularity began in ancient Rome and Greece, where white and off-white marble were used to construct a variety of structures, from hand-held sculptures to massive pillars and buildings.
The substance not likely to contain CaCO3 is:
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Identify the correct statement from the following:
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Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
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Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg), treated with HNO3, hydrogen is not liberated, why?
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