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Search results

  1. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Firstly, you need to know that three marks are alloted for each subtitled question. Find the keys in the question itself. For evidence, you can state that, as currently, they are talking about exposure to oxygen, the cut surface has reacted with oxygen and has gotten oxidised. Talk about color...
  2. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    As we know, maggots will respire, which will use up any amount of oxygen in the test tube and simultaneously release carbon dioxide in it. The volume, however, becomes less after some time, as oxygen is used up, and excess CO2 has been built. Thus, we can say that the maggots die, and the drop...
  3. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Thankkkkkkkkkkkkkxx!
  4. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Will be a great help if anyone explains me the answers to these questions..................
  5. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    I can't get them. Kindly explain..................
  6. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Can anyone please describe the formation of ethanoic acid by the oxidation of ethanol with acid. KMnO4?
  7. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Naww... like if you want to electroplate a spoon with copper. Copper will be the anode and the electrolyte will be for instance, copper sulphate. So copper will go to the cathode (where the spoon is), from the cathode or from the copper in the electrolyte? What's the purpose of keeping a COPPER...
  8. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    describe the displacement of ammonia from its salts Plz
  9. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    What about SodiumOH or CuOH. Application of heat gives us what? --and please see in your quote-- who's decomposition are you talking of?--
  10. Ameena Eesa

    To those of you who do not understand displacement of ammonia from its ammonium salts

    That's only one salt you mentioned. More tell :(
  11. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    How can electrical energy be produced from simple cells?
  12. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Aswk. In electrolysis, the metal ions travel from the solution to the cathode or from the anode to the cathode? What's the purpose of keeping the metal ions in both places? Plz help.
  13. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Actually I'd already seen these animations, i couldn't get the reactions though :(
  14. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    ...
  15. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Sis, the oil glands are to lubricate the feathers. The uropygial gland secretes the oils. This gland is found near the base of the tail and produces an oily substance that contains diester waxes that help waterproof feathers and keep them flexible. Birds will spread this oil to each feather...
  16. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Thank you, bro. And could you tell me one more thing, that, what are the products of heating a metal 1) Nitrate 2) Hydroxide Does it differ from metal to metal? Thank you.
  17. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Do lead, iron and hydrogen react with dil. acids?
  18. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Plz reply :(
  19. Ameena Eesa

    Physics, Chemistry and Biology: Post your doubts here!

    Aswk. Can anyone explain why and what color change comes about when: a) KMnO4 reacts with Fe(II)Cl, i.e, Iron(II) Chloride b) KMnO4 reacts with SO2 c) KI reacts with H2O2, i.e Hydrogen Peroxide I guess these are redox reactions, can you also show, even by completing the reaction? Much...
  20. Ameena Eesa

    Chemistry: Post your doubts here!

    Can you describe how electrical energy can be produced from simple cells?
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