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CIE Results
I got 2As and a B, and last year in As i had like 3Cs and a D. I know its not much but im glad i still improved it! Is anyone here giving SAT 2 for Nust? I sort of screwed my admission test for it plus i find that really hard.- Kanekii
- Post #17
- Forum: Announcements
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Chemistry: Post your doubts here!
Its B, As it has 4 different groups attached to the carbon atom. CH3-CH(Cl)-CH2Cl -
Chemistry: Post your doubts here!
B, As Ionic compounds conduct electricity in liquid state. Only 1 and 2 can be ionic compounds. As Y loses an electron to obtain stable electronic configuration and Both X and Z gain electron/s achieve stable electronic configuration. -
Chemistry: Post your doubts here!
You'll have to make a Hess cycle for this question. -
Chemistry: Post your doubts here!
In order for atoms to be in the same plane the bond angle must be 120 degrees The central carbon atom in 1 and 2 has 3 B.P so the bond angle is 120 while in 3 the central carbon will also make a bond with hydrogen so it will have 4 B.P hence the bond angle will be 109.5 not 120. -
Chemistry: Post your doubts here!
A P Subshell has 3 orbitals and each orbital can hold a maximum of 2 electrons. If it were a 3P subshell then the maximum number of electrons that it could hold would be 6. Therefore statement A is incorrect. Statement D is correct as Phosphorus has 3 electrons in its 3P subshell, Each 3P... -
Chemistry: Post your doubts here!
CuCo3 + 2HCl = CuCl2 +Co2 + H20 n of Hcl=2x25x10^-3 n of Hcl=0.05mol 2mol:24dm^3 0.05mol:x x=0.6 dm^3 Since Hcl was the limiting reactant so we used it to find the volume of gas. -
Chemistry: Post your doubts here!
Is electrolysis of brine and extraction of Aluminium in the syllabus for chem p1?? -
Chemistry: Post your doubts here!
For Q8 C2O4 has an overall charge of 2- since Oxygen will give - 8 charge you will have to +6 to make the overall charge to 2-,therefore each atom of C will have +3 charge and its oxidation as the the oxidation state changes from +3 to +4. For Q18 you'll have to make equation of decomposition... -
Physics: Post your doubts here!
Instead of adding the tube to a manometer you add it to a pump and a pressure gauge. -
Mathematics: Post your doubts here!
I literally checked the first and last row to check if it was arranged seems like it was not arranged in the middle row. Btw for the combination question what if we used factorials instead like: 6!/3!*2!*1! would that be correct or still wrong. -
Mathematics: Post your doubts here!
Does anyone have any notes foe Vectors P3? -
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Chemistry: Post your doubts here!
I just realised the stupid mistake that i made, i used the Mr of the whole compound instead of Cu. :cry: -
Chemistry: Post your doubts here!
Y-axis-Absorbance, X-axis-Conc of Cu2+ I used n=CV with volume of 250*10^-3 Found Mass using molar ratios since and then divided this by the increase in mass which was given *100 Though i think this was wrong or i made some error -
Chemistry: Post your doubts here!
Mine was 60 something i think it was wrong. -
Chemistry: Post your doubts here!
Yes it had to be taken from the graph and it was conc of Cu2+ which was 0.19 -
Chemistry: Post your doubts here!
How did you do the last part of the last question? -