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P1 MCQ's preparation thread for chemistry ONLY!!!!
Q6 i found mass 1st. mass = density * volume. u get 1g. then find mole. 1/18. thn use PV=nRT . I got 2.7 tho. but its near almost :) -
AS Physics P1 MCQs Preparation Thread.
i just used the formula directly. il check the past paper and tell u :) -
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Chemistry and Physics AS paper 12 MCQS
May 2007- Q7 is c. looking at the diagram we can see that u + X = v and we know the equation v=u+at hence x is at. Q37- same resistance because they have the same volume and as the length is same area should be same so overall resistance is also same. May 2008 - Q21 is A. It was in the syllabus... -
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P1 MCQ's preparation thread for chemistry ONLY!!!!
lol ur welcome :) -
AS Physics P1 MCQs Preparation Thread.
momentum is M1V1-M2V2 that is 60m-40m=20m elastic collision occurs as it is frictionless. M doubled as they stick to eachother so speed halves. 20/2=10 OR just use any value for mass and calculate. For example, mass=10kg. Then before collision momentum= (60*10)-(40*10)=200 after collision should... -
AS Physics P1 MCQs Preparation Thread.
the spacing is very small so smallest wavelength needed. X ray has shortest wavelength amongst the 4 options. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
AlCl3 is more covalent than ionic. MgCl2 is ionic with some covalent. Got the difference? :P -
Solved physics Paper 5??
Dont worry ! You can score a minimum of 5-10 marks by just writing basic lines. Just write as much as u know about the given experiment. The variables, graph drawing, safety precautions and anything related to your experiments :D -
Solved physics Paper 5??
Find the gradient first and then round it. For part d, h is the same as gradient. For g its not the same. log g = y intercept. so to find g u have to inverse log or 10^ ur y intercept value. Then to find error u use the same way of log. Find inverse log highest value of y intercept - inverse log... -
Chemistry: Post your doubts here!
Lol even i didnt get it. Im confused between C and D. I just dont get why its D?! -
A level Biology: Post your doubts here!
may 2010- Q2- x400 is a very low magnification. U cannot see organelles. Try using the formula magnification= size of drawing/actual size. U will know that its hard to view cells less than 1mm in size at this mag. Q11- its not c or d as we dont know anything about the heat capacity. Even i have... -
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Physics: Post your doubts here!
Q5- x is 0.44. Add uncertainties. U get 0.03. (0.03/0.44)*100 = 7% Q8- find speed in both places. speed between X and Y = 40/12 and speed between Y and Z is 40/6. Then acceleration = change in velocity/time. so find the change in velocity and divide it by the average of time i.e. (12+6)/2 Q14-... -
Physics: Post your doubts here!
Q 22 - 1st of all calculate mass* 6.02*10^23. this gives u the mass of all atoms in the crystal. then find the volume by dividing the mass u calculated by density. density=mass/volume. Then divide volume by 6.02*10^23. and find its cube root :) Q25- Umm i guess extension will be the same as it... -
Physics: Post your doubts here!
I know its hard!! umm honestly u cant b sure about that. It all depends on the marks not the grades. Sometimes if u get an A in all papers u still end up with an overall A instead of the expected A* :P But dont worry ISA well do it ;) My p4 was good :) what bout yours? I really wanted to discuss... -
Chemistry: Post your doubts here!
a and d have no dipole. CO2 is linear shaped and so both oxygen atoms cancel out. the same goes for option a. all chlorine molecules cancel eachothers polarity. in b only oxygen is electronegative and it gets -ve charge. in c also there is a dipole but weaker as the chlorine atoms form a -ve... -
Chemistry: Post your doubts here!
Oct 2010 - Q8 - Ca(S) --> Ca(g) is +177 then add ionisation energies 1 and 2 wich are 590 and 1150 then Ca+2(g) --> Ca+2(aq) is -1565 so 117+590+1150-1565 = 352 Q25- a is cracking wich needs 500 degree. b needs reflux in ethanol so high temp needed. c also needs heating. only d doesnt need to...