• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. H

    Chemistry MCQ thread...

    its A in markscheme !!!,,,,,,,u u dont think 1ST option to be ryt
  2. H

    Chemistry MCQ thread...

    yes
  3. H

    Chemistry MCQ thread...

    When 0.10 g of magnesium was added to 100 cm3 of 0.10 mol dm-3 dilute sulfuric acid in a calorimeter (with negligible heat capacity), a maximum temperature rise of 5.8 oC was recorded. What is the enthalpy change of this reaction? A – 589 kJ mol-1 B – 242 kJ mol-1 C – 172 kJ mol-1 D – 28.4 kJ mol-1
  4. H

    Chemistry MCQ thread...

  5. H

    Chemistry MCQ thread...

    ZISHI...1 IS ALSO CORRECT AND ITS a... JUst stick with the use of oxidation numbers
  6. H

    Chemistry MCQ thread...

  7. H

    Chemistry MCQ thread...

    yea they hydrolyse it
  8. H

    Chemistry MCQ thread...

    The standard enthalpy changes of formation of carbon dioxide and water are −394 kJ mol-1 and −286 kJ mol-1 respectively. If the standard enthalpy change of combustion of propyn, C3H4, is −1938 kJ mol-1, what is its standard enthalpy change of formation? A +184 kJ mol-1 C +284 kJ mol-1 B −184 kJ...
  9. H

    Chemistry MCQ thread...

    The Voyager 2 probe has shown that the surface of Triton, a moon of the planet Neptune, contains solid methane which flows rapidly. Which statement best explains the mobility of solid methane? A Methane molecules contain strong C-H bonds. B Solid methane has a metallic structure. C The...
  10. H

    Chemistry MCQ thread...

    yess
  11. H

    Chemistry MCQ thread...

    ya both tru zisi that solubility and CL one
  12. H

    Chemistry MCQ thread...

  13. H

    Chemistry MCQ thread...

    The compound least likely to be formed when gaseous ethene is bubbled into a mixture of aqueous bromine and aqueous sodium chloride is A CH2BrCH2Br B CH2BrCH2OH C CH2BrCH2Cl D CH2ClCH2Cl
  14. H

    Chemistry MCQ thread...

  15. H

    Chemistry MCQ thread...

    tru
  16. H

    Chemistry MCQ thread...

    A dibromoalkane CH3CH2CHBrCHBrCH2CH3 was treated with excess alcoholic potassium hydroxide. The main product would be A CH3CH2CH(OH)CH(OH)CH2CH3 B CH3CH2CH2O-K+ C CH3CH=CH-CH=CHCH3 D CH3CH2CH=CHCH2CH3
  17. H

    Chemistry MCQ thread...

    35 Use of the Data Booklet is relevant to this question. Which statements about Na+, Mg2+ and Al3+ ions are correct? 1 NaCl has no covalent character as Na+ is an ion with low charge density. 2 Al3+ forms Al(H2O)6 3+ readily but not Na+. 3 Al3+ has the most exothermic enthalpy change of...
  18. H

    Chemistry MCQ thread...

  19. H

    Chemistry MCQ thread...

    YA ITS c...baco3 has high thermal stability so will not decompose initialyy.....later on will react with acid
  20. H

    bIo mcqs thread !!!

    cnt understnd 1st...why it shudnt be A?
Top