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Monothecous condtion of stamens, i.e,. P...

Monothecous condtion of stamens, i.e,. Presence of a signle anther lobe is characterstic of family

A

Cucurbitaceae

B

Malvaceae

C

Asterceae

D

Brassicaceae

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The correct Answer is:
B
The another which contains only one another lobe are called monothecous anters. Monothecous anthers are bisporangiate (contain two pollen sacs), as in family Malvaceae.
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Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen's reaction, the addition of hydrogen takes place I presence of Raney nickel catalyst. Platininm and palladium can also be used as catalyst and used in finley divided state. Experimentally, it is observed that less crowded alkenes adsorb H_(2) with faster rate. Controlled hydrogenation of alkyne H_(2) with faster rate. Controlled hydrogenationof alkyne in presence of Lindlar's catalyst yields cis product i.e., 'cis' alkene. Thus, in presence of Lindlar's catalyst 'syn' addition takes place. The relative rate of hydrogenation follows the order: Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product. The product of the following reaction is:

Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen's reaction, the addition of hydrogen takes place I presence of Raney nickel catalyst. Platininm and palladium can also be used as catalyst and used in finley divided state. Experimentally, it is observed that less crowded alkenes adsorb H_(2) with faster rate. Controlled hydrogenation of alkyne H_(2) with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar's catalyst yields cis product i.e., 'cis' alkene. Thus, in presence of Lindlar's catalyst 'syn' addition takes place. The relative rate of hydrogenation follows the order: Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product. Answer the following questions: The relative rate of catalytic hydrogenation of following alkenes is:

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NCERT FINGERTIPS-MORPHOLOGY OF FLOWERING PLANTS-Morphology Of Flowering Plants
  1. Select the incorrect pair out of the following

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  2. Syngernesious condition of stamens is found in family

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  3. Monothecous condtion of stamens, i.e,. Presence of a signle anther lob...

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  4. Indentify the different types of placentation shown in figure and sele...

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  5. Inplacentation, a monocarpellary overy bears a sigle longitudinal ovul...

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  6. Which kind of placentation is represented by the given figure ?

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  7. Which of the following figures represents a typical placentation as se...

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  8. Overy is one-chambered but it becomes two-chambered due to the formati...

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  9. Match column I with column II and select the correct option from given...

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  10. Given figure represents a drupe of mango. Select the option that corre...

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  11. Maize grain is a fruit known as

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  12. Edible part of apple and pear is

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  13. Select the incorrect the statements the given figure .

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  14. Identify the given types of fruit select the correct option.

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  15. Select the mismatched pair out of the following

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  16. X is scar on the seed coat through which the following seeds were atta...

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  17. Refer to the given figures showing structure of dicotyledonous seed an...

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  18. Endospermic seeds are found in

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  19. In albuminous seeds, food is stored in and in exalbuminous seeds, food...

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  20. Cereals, castor and coconut possess seeds.

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