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A runner of water with one thick interno...

A runner of water with one thick internode, found in aquatic rosette plants like Eichhorina (water hyacinth) is called

A

stolon

B

offset

C

both correct

D

trailer

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B
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Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained. How many products obtained in above reaction?

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained.

Di-tert-glycols rearrange in the presence of acid to give alpa -tertiary ketones. The trivial name of the simplest glycol of this type is pinacol, and this type of reaction therefore is named pinacol rearrangement (in this specific case, the reaction is called a pinacol-pinacolone rearrangement). The rearrangement involves 4 steps. one of the hydroxyl groups is protonated in the first step. A molecule of water is eliminated in the second step and a tertiary carbocation is formed. The carbocation rearranges in the third step into a more stable carboxonium ion via a [1,2] rearrangement. In the last step, the carboxonium ion is deprotonated and the product ketone is obtained.

TRUEMAN BIOLOGY-MORPHOLOGY OF FLOWERING PLANTS (ANGIOSPERMS)-Multiple Choice Questions
  1. Tendril is axillary in

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  2. Stolon differs from runner in being

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  3. A runner of water with one thick internode, found in aquatic rosette p...

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  4. In Citrus, Duranta and Bougainvillea, the thorns are the modified

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  5. The needle like cladodes of Asparagus are metamorphosed stem for

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  6. Phylloclade is found in

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  7. When the entire stem with its all branches become green, flat, fleshy ...

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  8. A cladode (cladophyll) is green leaf like modified aerial stem and is

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  9. The branching where main stem grows endlessly due to presence of a ter...

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  10. In grasses, the vigorous and quick growth occurs due to

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  11. Which is the odd type of vegetable in a basket containing the followin...

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  12. Which part of leaf is sensitive to sleep and shock movements ?

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  13. In Eichhornia (water hyacinth), the spongy, swollen pulvinus structure...

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  14. The cord like tendrils in Smilax are

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  15. In which plant stipules become leaf like for photosynthesis ?

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  16. Choose the correct statement.

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  17. The phyllotaxy in which two leaves arise from a bud at each node is

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  18. A dicot leaf with parallel venation is

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  19. A monocot leaf has parallel venation but there are some monocot leaves...

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  20. Arrangement of young leaves with respect to each other in a bud is cal...

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