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प्रश्न
How do minerals occur in sedimentary rocks?
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उत्तर
Minerals occur in sedimentary rocks in the form of beds or layers. These rocks are formed by deposition, accumulation and concentration in a horizontal strata. The minerals in these rocks are formed by the process of precipitation or through chemical, physical and biological changes in sediments. While coal and iron ore are formed due to heat and pressure, gypsum, potash and salts are formed due to evaporation.
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संबंधित प्रश्न
Highlight the importance of petroleum
Explain the pro active approach adopted by the National Thermal Power Corporation (NTPC) for preserving the natural environment and resources.
Mention one advantage of the use of natural gas over coal or petroleum
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Why is petroleum often referred to as “liquid gold”?
Give reason.
Environmental aspects must be carefully looked into before building huge dams.
Give reasons.
Most industries are concentrated around coal mines.
Distinguish between the following.
Biogas and natural gas
Name two oil refineries in the public sector one each in Assam and Gujarat.
Name two industries that use a high quantity of coal.
