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P1 MCQ's preparation thread for chemistry ONLY!!!!
39. Decolourising aqueous bromine will require a C=C double bond. There isn't any for the compound in 3. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
5. -214 divided by 2 because 2 moles of ICl3 are made. Add that to +38. 29. You have to draw all the alkenes and check for cis-trans isomers. -
Chemistry: Post your doubts here!
In D, the compound ix XY. n is the number of moles, not the number of bonds. There is only one bond in the compound X-Y. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
14. Phosphorous chloride and oxide are both acidic. 21. 31. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
Okay... May/June or October/November?! -
P1 MCQ's preparation thread for chemistry ONLY!!!!
1. Use WD=1/2Fe an find e using F/k. WP will be F/4k and WQ F/2k. F/2k multiplied by 1/2 will give F/4k. 2. (A^2)/3 = (2A)^2/x. -
Chemistry: Post your doubts here!
No, in D n is the number of moles of the compound XY. -
As physics p1 MCQS YEARLY ONLY.
12. Assume the man and the barrel meet halfway. Calculate the potential energy lost by the barrel and the potential energy gained by the man. Minus this from the initial energy of the whole system (which is the potential energy of the barrel). What you'll get is the k.e. Use 1/2mv^2, and m=mass... -
Chemistry: Post your doubts here!
11 is A, if I'm not mistaken. If you take n to be 4, for example, you'll see there are 4 X-Y bonds, so the total energy can be divided by 4 to get the energy for one bond. Not so for the B, C and D. -
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As physics p1 MCQS YEARLY ONLY.
Yeah actually you're right, it'll be 3/4. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
16. Yes it does, differently with cold dilute NaOH and hot concentrated NaOH. It's an equation we have to memorise. With cold dilute NaOH you get HClO and with hot concentrated NaOH you get HClO3. You also got NaCl and H2O in both. 32. Because the alkyl chain is hydrophobic, and oil too is... -
P1 MCQ's preparation thread for chemistry ONLY!!!!
11. An acid gives away H+ ions. It can give away more H+ ions if there's something that'll readily take H+ ions. 16. Write the equation for the reaction of Cl2 with NaOH. 20. Draw them all. 32. 1 is true because the S-O bond is polar. 2 is true. 3 is true too because there is no double-bonded C. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
The steeper the line, the greater its gradient. If you look at B, the last line is steeper than the first. That means the NEGATIVE gradient is increasing, so overall it's decreasing. The first line of the graph of C is steeper than the last line, so the NEGATIVE gradient is decreasing, i.e... -
As physics p1 MCQS YEARLY ONLY.
0.5:1.5:1 1:3:2 Note: For Al, it's 3/2 O2. -
Physics: Post your doubts here!
7. The component of acceleration is the acceleration due to gravity and that's the same always anywhere on Earth. 20. Choose a point and find the pressure due to P & Q at that same point. For example, any point on the second dotted line. The pressure due to Q will be = density of Q x g x h. The... -
Physics: Post your doubts here!
Do you mean making h the subject of the forumla? h=v^2/2gx(m+M/m).