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A is present in the axil of petiole in b...

A_______ is present in the axil of petiole in both simple and compound leaves but not in the axil of leaflets

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Nucleophilic substitution reactions generally expressed as Nu^(-) +R-L rarr R-Nu +L^(-) Where Nu^(-) rarr Nucleophile , R-L rarr substrate, L rarr leaving group The best leaving groups are those that become the most stable ions after they depart. since most leaving group leave as a negative ion, the best leaving groups are those ions that stabilize a negative charge most effectively. A good leaving group should be (a) electron-withdrawing to polarize the carbon (b) stable once it has left (not a strong base) (c) polarise able to maintain partial bonding with the carbon in the transition state (both S_(N)1 and S_(N)2) . This bonding helps to stabilise the transition state and reduces the activation energy. (I) CH_(3)Br (II) CH_(3)F (III) CH_(3)OH (IV) CH_(3)OSO_(2)CF_(3) The correct order of decreasing reactivity of the above compounds towards CH_(3)O^(-) in an S_(N)2 reaction is:

Statement-1 : In compound pendulum, if suspension point and centre of oscillation are mutually inter change, then no change in time period is obtained. Statement-2 : Length of equivalent simple pendulum remains same in both the case.

ALLEN -MORPHOLOGY OF FLOWERING PLANTS -EXERCISE
  1. In a leaf, when its lamina is entire or when incised, the incisions do...

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  2. When the incisions of leaf lamina reach upto the midrib the leaf is kn...

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  3. A is present in the axil of petiole in both simple and compound leaves...

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  4. Rachis is present in

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  5. In neem plant, which type of leaf is present

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  6. Match the following

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  7. Name the plant in which, the leaves are short lived and petiole modify...

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  8. the arrangement of flower on floral axis is known as

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  9. In (a) inflorescence the main axis continuous to grow whereas in (b) i...

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  10. Calyx and corolla are (a) organs while androecium, and gynoecium are (...

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  11. When calyx and corolla are not distinct then they are known as

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  12. If a flower has both androecium and gynoecium, it is aflower.

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  13. if a flower either only has stamens or only carpels it is a flower.

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  14. Recognize the type of inflorescence

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  15. Recognize the type of flower.

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  16. In case of perigynous flower, the ovary is

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  17. When the sepals are united then condition is known as

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  18. When the petals are free then condition is known as

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  19. The node of arrangement of sepals or petals in floral bud with respect...

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  20. If the margins of sepals or petals overlap one anohter but not in any ...

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