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  1. D

    Chemistry: Post your doubts here!

    A. Why is 3 correct?
  2. D

    Chemistry: Post your doubts here!

    C
  3. D

    Chemistry: Post your doubts here!

    1. It says it is neutral. So D option is incorrect as carboxyl group is present. 2. Orange ppt can only be given by aldehydes and ketones. So B option is incorrect as it contain ester group. 3. Only alcohol and carboxylic groups gives HCl with PCl5. Hence C is the right answer. :)
  4. D

    Chemistry: Post your doubts here!

    1. Neutral.. Carboxyl group acidic iss liye D k ilawa sab neutral 2. Orange ppt with 2 4 dnph...SIRF aldehyde aur ketones dete hain ppt. B mein ester hai so NO 3. HCl with PCl5...sirf alcohol aur carboxylic acid dete hain. Iss liye C
  5. D

    Chemistry: Post your doubts here!

    Ans: C
  6. D

    Chemistry: Post your doubts here!

    Which pair of reactions could have the same common intermediate? W CH3CH2CH3 → intermediate → (CH3)2CHCN X CH3CH(OH)CH3 → intermediate → (CH3)2C(OH)CN Y CH3CH=CH2 → intermediate → CH3CH(OH)CH3 Z CH3CO2CH2CH2CH3 → intermediate → CH3CH2CH2Br A W and X B W and Y C X and Z D Y and Z Ans is B
  7. D

    Physics: Post your doubts here!

    Thankyouuu :)
  8. D

    Physics: Post your doubts here!

    In one such pump the long approach pipe holds 500kg of water. A valve shuts when the speed of this water reaches 2.0ms–1 and the kinetic energy of this water is used to lift a small quantity of water by a height of 15m. The efficiency of the pump is 10%. Which mass of water could be lifted 15m...
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