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Search results

  1. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Readings.com.pk - FTW. Ik din main order mangwa lo. Altaf Bhai ki dhamki dedena. ;)
  2. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Main tou khud shukar kr rha hun k mery paas hai. :D :p
  3. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Fundamental Chemistry. :cool:
  4. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Look, carboxylic acids don't contain double carbon-carbon bonds so this acid will not follow the general formula for the ordinary carboxylic acids.
  5. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Zinc reacts with water over ages. :p Zinc reacts with steam to form ZnO. If you use powdered zinc and very hot water then the zinc reacts otherwise it is a process that takes ages.
  6. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    k. Look, the important part is that the compound MUST contain a carboxyl functional group AND a carbon-carbon double bond. And this is only found in D.
  7. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Look, one mole of ANY compound contains the same no. of molecules i.e. Avogadro Number of molecules.
  8. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Number of atoms are for one mole of an element only not molecules such as ethanol and ethane.
  9. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Since it reacts with Na2CO3 to form CO2. The reaction is Acid + Metal Carbonate, so we know that it is a carboxylic acid. Also, since it reacts with bromine to turn it colourless. The compound has a carbon-carbon double bond. The answer hence should be D.
  10. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Answer is C. Number of Particles = No. of moles * Avogadro Number.
  11. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Chemistry. :cool:
  12. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    HCl is covalent. Have you heard of hydrides? They are unique bonds of Hydrogen (with group 1 metals mostly) in which hydrogen forms negative ion. So the answer should be D, in which Sodium Hydride (NaH) would be formed.
  13. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Caesium is the most reactive metal of all. It would probably explode while reacting with the water. Still though, Caesium Hydroxide would be formed.
  14. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Copper doesn't react at all with water neither does silver. The first three form hydroxides which are soluble (calcium hydroxide is only slightly soluble). The rest form oxides which are insoluble (e.g. MgO, ZnO, Fe2O3).
  15. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Potassium, Sodium and Calcium; Magnesium reacts slowly with water but vigorously with steam.
  16. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    HCl breaks up into ions in aqueous solution so it conducts electricity only in aqueous solution. So, HCl is X. We know that except graphite, non-metals don't conduct in any state so Sulphur (S) is W. Metals can conduct in both solid state and molten state because of free electrons so Pb is Y...
  17. Saad Mughal

    English Language 1123/22

    It's not of our concern that whether the grandson became an emperor or not. It was stated that a grandson of an emperor gifted pandas to Japan. It was either False or Can't Tell.
  18. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Use the equation __CO3 + __H2O. Now, for 7 products, from the options, the only one that fits is C, i.e. 3CO2 + 4H2O from the C3H8.
  19. Saad Mughal

    English Language 1123/22

    Yeah. Same to you! :)
  20. Saad Mughal

    English Language 1123/22

    Nobody can tell for sure, but it depends, you may get Band 2 or perhaps even Band 1 if it is good enough.
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