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The female genital pore of Pheretima pos...

The female genital pore of Pheretima posthuma is located upon the segment

A

14th

B

16th

C

18th

D

15th

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Zeolites are alumina-silicates that are micro-porous in nature. Zeolites have a honeycombIike structure, which makes them shape-selective catalysts. They have an extended 3D-network of silicates in which some silicon atoms are replaced by aluminium atoms, giving them an Al-O-Si framework. The reactions taking place in zeolites are very sensitive to the pores and cavity size of the zeolites. Zeolites are commonly used in the petrochemical industry. A catalytic reaction which depends upon the pore structure of the catalyst and on the size of the reactant and the product molecules is called shape-selective catalysis. For example, catalysis by zeolites is a shapeselective catalysis. The pore size present in the zeolites ranges from 260-740 pm. Thus, molecules having a pore size more than this cannot enter the zeolite and undergo the reaction. Upon which factor a catalytic reaction of shape selective catalyst depends ?

Read the given passage and answers following questions : Zeolites are alumino-silicates that are micro-porous in nature. Zeolites have a honeycomb like structure, which makes them shape-selective catalysts. They have an extended 3D-nelwork of silicates in which some silicon atoms are replaced by aluminium atoms, giving them an Al-O-Si framework. The reactions taking place in zeolites are very sensitive to the pores and cavity size of the zeolites. Zeolites are commonly used in the petrochemical industry. A catalytic reaction which depends upon the pore structure of the catalyst and on the size of the reactant and the product molecules is called shape-selective catalysis. For example, catalysis by zeolites is a shape selective catalysis. The pore size present in the zeolites ranges from 260-740 pm. Thus, molecules having a pore size more than this cannot enter the zeolite and undergo the reaction. Upon which factor a catalytic reaction depends ?

Zeolites are alumina-silicates that are micro-porous in nature. Zeolites have a honeycombIike structure, which makes them shape-selective catalysts. They have an extended 3D-network of silicates in which some silicon atoms are replaced by aluminium atoms, giving them an Al-O-Si framework. The reactions taking place in zeolites are very sensitive to the pores and cavity size of the zeolites. Zeolites are commonly used in the petrochemical industry. A catalytic reaction which depends upon the pore structure of the catalyst and on the size of the reactant and the product molecules is called shape-selective catalysis. For example, catalysis by zeolites is a shapeselective catalysis. The pore size present in the zeolites ranges from 260-740 pm. Thus, molecules having a pore size more than this cannot enter the zeolite and undergo the reaction. What is the pore size of Zeolites ?

MODERN PUBLICATION-STRUCTURAL ORGANISATION IN ANIMALS-EXAMPLE
  1. The female genital pore of Pheretima posthuma is located upon the segm...

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  2. What is the function of nephridia?

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  3. How many types of nephridia are found in earthworm based on their loca...

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  4. Draw a lebelled diagram of the reproductive organs of an earthworm.

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  5. Draw a labelled diagram of alimentary canal of cockroach.

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  6. Distinguish between the following Prostomium and peristomium

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  7. Distinguish between the following Septal nepphridium and Pharyngeal ...

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  8. What are cellular components of blood?

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  9. What are the following and where do you find them in animal body? Cho...

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  10. What are the following and where do you find them in animal body? Axo...

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  11. What are the following and where do you find them in animal body? Cil...

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  12. Describe various types of epithelial tissues with the help of labelled...

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  13. Distinguish between Simple epithelium and compound epithelium

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  14. Write the similarities between cardiac muscles and stripped muscles.

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  15. Distinguish between Dense regular and dense irregular connective tiss...

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  16. Distinguish between Adipose and blood tissue.

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  17. Distinguish between Simple gland and compound gland.

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  18. Mark the odd one in each series: Areolar tissue, blood , neuron,tendo...

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  19. Mark the odd one in each series: RBC, WBC, platelets , cartilage

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  20. Mark the odd one in each series: Exocrine, endocrine, salivary gland,...

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  21. Mark the odd one in each series: Maxilla, mandible, labrum, antennae

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