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In cold countries water pipes sometimes ...

In cold countries water pipes sometimes burst, because

A

Pipe contracts

B

Water expands on freezing

C

Pressure is greater outside

D

Water freezes, pressure increases

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The countries which do not have oil reservoirs in their land import oil from other countries. But sometimes during transporting oil through sea routes, accidental oil spilling occurs. This oil spilled in the ocean may prove fatal and toxic to aquatic animals. Therefore, removel of this spilled oil is essential for protection of aquatic life. For removing this oil layer, certain microbes like Pseudomonas spp. and Alcanivarax borkumensis are used. These microbes have the ability to destroy the pyridines and other toxic chemicals. The hydrocarbonoclastic bacteria (HCB) are able to decompose the hydrocarbons and bring about the reaction carbon with oxygen resulting in formation of CO_(2) and water. Like oil spills cause damage to aquatic life. plastic forms the major part of the garbage on land. Plastics are difficult to degrade as they are made up of PET. By research, various species like Vibrio and Idenoella sakaiensis which can degrade PET have been identified. There are certain species of microbes which can decompose rubber from garbage. Based on the given paragraph answer the following question. Which type of chemical compounds are degraded by microbes used for clearing oil spills ?

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The coutries which do not have oil reservatirs in their land import oil from other countries. But sometimes during transporting oil through sea routes, accidental oil spilling occurs. This oil spilled in the ocean may prove fatal and toxic to aquatic animals. Therefore, removel of this spilled oil is essential for protection of aquatic life. For removing this oil layer, certain microbes like Pseudomonas spp. and Alcanivarax borkumensis are used. These microbes have the ability to destroy the pyridines and other toxic chemicals. The hydrocarbonoclastic bacteria (HCB) are able to decompose the hydrocarbons and bring about the reaction carbon with oxygen resulting in formation of CO_(2) and water. Like oil spills cause damage to aquatic life, platic forms the major part of the grabage on land. Plastics are difficult to degrade as they are made up of PET. By research, various species like Vibrio and Idenoella sakaiensis which can degred PET.By research, various species like Vibrio and Ideonella sakaiensis which can degrade PET have been identified. There are cartain species of microbes which can decompose rubber from garbage. Based on the given paragraph answer the following question. Name any two species of microbes which can degrade rubber from

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CHETANA PUBLICATION-THERMAL PROPERTIES OF MATTER-EXERCISE
  1. The relation between alpha and beta is

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  2. Two holes are made in copper plate. The plate is heated. The distance ...

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  3. In cold countries water pipes sometimes burst, because

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  4. Eskimos build double walled houses of the blocks of ice because

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  5. The sum of all energies of all molecules in a body is called A. Kine...

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  6. Cubical expansion is undergone by

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  7. There is a hole in a metal plate. Upon heating the plate, the diameter...

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  8. Coefficient of areal expansion for a solid is

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  9. In a lake, when it cools to the point where it is about to freeze, at ...

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  10. The volume of metal block changes by 0.18% when it is heated through 2...

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  11. Two metal rods has lengths in the ratio 3:2 and coefficient of linear ...

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  12. Iron sheet 50 cm X 20 cm is heated through 100^@C. If prop = 12 xx 10^...

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  13. Railway tracks are laid with gaps for expansion. The gap between the s...

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  14. An iron ball is heated. Then percentage increase will be largest in

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  15. A copper wire of length 1 increases in length by 0.2% on heating from ...

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  16. Celsiusscale is calibrated according to........

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  17. A constant temperature volume of given mass of gas is inversely propor...

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  18. Specific heat of water is

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  19. For measurement of heat,.....is used.

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  20. Quantity of heat required to change state of unit masssubstance withou...

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