Here are the question papers with solutions of INOs (Indian National Olympiads) held on 31 Jan, 2015 and 1 Feb, 2015.

INChO Question Paper, Solutions

INBO Question Paper, Solutions

INJSO Question Paper, Solutions

**Note**

- You might have to append extension
**.pdf**on downloading. - It would be nice if someone can provide me a link for INMO.
- Abbreviations:

- INChO:Indian National Chemistry Olympiad
- INAO: Indian National Astronomy Olympiad
- INBO: Indian National Biology Olympiad
- INPhO:Indian National Physics Olympiad
- INJSO: Indian National Junior Science Olympiad

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## Comments

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Astronomy:

Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. 1 150111000025 8 150610000449 15 150711000690 22 151010001014 29 151210001307 36 151611001550 2 150111100019 9 150611000414 16 150711000691 23 151011001009 30 151210001312

3 150210000105 10 150611000419 17 150711100674 24 151110101115 31 151210001315

4 150210100098 11 150710000712 18 150711100678 25 151111101104 32 151210001319

5 150211100094 12 150710100707 19 150711100679 26 151111101106 33 151510101513

6 150511100304 13 150711000685 20 150711100680 27 151111101107 34 151511001511

7 150610000429 14 150711000687 21 150711100683 28 151210001305 35 151511101506

Cut off score: 58/100

Biology:

Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. 1 150100010067 8 150400010277 15 150600010522 22 151000011086 29 151200011391 2 150100010077 9 150400110229 16 150600010528 23 151001111026 30 151200011405 3 150200010162 10 150401110224 17 150600010529 24 151100011228 31 151200011409 4 150200010172 11 150500010360 18 150600010532 25 151100011236 32 151200111343 5 150201110112 12 150500010368 19 150800010904 26 151100011264 33 151200111348 6 150201110113 13 150500010376 20 150800110854 27 151200011386 34 151300111446 7 150301110192 14 150600010518 21 151000011075 28 151200011388 35 151400011497 Cut off score: 167/300

Chemistry:

Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Roll No. Roll No. 1 150111100018 8 150701100717 15 150711100669 22 150801100849 29 151001111026 36 151511101505 2 150201100114 9 150701100721 16 150711100671 23 150810100841 30 151100101188 37 151511101506 3 150210100098 10 150701100732 17 150711100674 24 150810100843 31 151110101115

4 150211100095 11 150710100696 18 150711100678 25 150811100838 32 151111101107

5 150410100219 12 150710100703 19 150711100679 26 150901100938 33 151200101373

6 150410100220 13 150711100665 20 150711100683 27 151000101047 34 151201101327

7 150511100303 14 150711100666 21 150800100881 28 151001101037 35 151400101481

Cut off score: 65.5/112.5

Junior Science:

Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. 1 150220000091 8 150720000560 15 150720000627 22 151020000990 29 151120001096 2 150320000179 9 150720000561 16 150820000829 23 151020000991 30 151120001097 3 150420000210 10 150720000572 17 150820000831 24 151020000994 31 151120001098 4 150520000294 11 150720000598 18 150820000835 25 151020000996 32 151120001102 5 150620000378 12 150720000605 19 150820000836 26 151020000999 33 151220001268 6 150620000396 13 150720000606 20 150920000917 27 151120001090 34 151220001272 7 150720000556 14 150720000615 21 150920000919 28 151120001095 35 151220001286Cut off score: 39/90

Physics: Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. Sr. No. Roll No. 1 150111100019 8 150501100329 15 150701100732 22 150711100681 29 151201001336 2 150211100094 9 150511000306 16 150711000687 23 150711100683 30 151201101325 3 150211100095 10 150601000469 17 150711000693 24 150801100849 31 151211101294 4 150401100226 11 150601100458 18 150711100674 25 151001001040 32 151401001476 5 150401110224 12 150611000413 19 150711100678 26 151001101033 33 151401101473 6 150411100216 13 150701100717 20 150711100679 27 151001111026 34 151401101474 7 150501000339 14 150701100728 21 150711100680 28 151111101106 35 151511001511 Cut off score: 55.5/100

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Congrats to all those selected for OCSCs!

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Thanks.

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For which one you got selected?

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Congrats @Mvs Saketh

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Did you get selected ?

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HBCSE site is loading

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It has crashed again , but it was half loaded, and they have uploaded the results.

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Slow internet :(

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I'm getting 58 in INPhO, 73.5 in INChO.

Marks my friends have got in INPhO : 36, 42, 43.5.

Marks my friends have got in INChO : 33, 40.5, 41, 54.

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OMG! @Agnish Kumar Behera That's too damn awesome. You qualified 2 IOTC's Did you make it to INBO-OCSC this year also ? What was your score in INBO? How are you so good at all 3 sciences? Is your target JEE/PMT/pure science?

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I'll be joining IISc this year.. :)

I got 188 in INBO but sadly I wont be attending the Bio OCSC this year..

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Whats your aim Ronak ?

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Thanks and best of luck , i shall update the stats now,, :)

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A friend of mine got 18 in INPhO. Please update your stats. :)

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@Shriram S B @Uchiha Itachi and other INPHO participants, help me make a statistical prediction by going to http://inpho-blogspot-2015.blogspot.in/

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@Mvs Saketh Many more marks have been posted at the blog. Please update stats.

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@Mvs Saketh well, i study at allen,Kota. 8 students qualified for inpho (including me).i have already posted marks of 3 of them. another one:51 . i do not exactly know the marks of rest of the students but the guy who got 51 told me that all others got in the range of 41 to 50 .

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@Mvs Saketh Two highest from reso are 43 and 65. I don't know about other coachings

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Thankyou :)

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is Bhavya getting that 65

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what about incho

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I am also in reso.. Do you mean reso kota or overall?

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but i got selected for InChO AND GOT 35 MARKS in InChO . Is there any chance of me getting selected tocamp???

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hi avinesh :D

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i am studying in class 11

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how much did all your friends get in INChO

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Did any receive scorecard for inpho pls post your marks

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not yet

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Check the 2016 thread.

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I feel the cutoff would be 40 as other than Yukawa qs last two parts and 3 eqn 3 variables of resistances question everything was jee level. How much are all of you expecting.

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use this thread

https://brilliant.org/discussions/thread/ino-2016/

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which part 3 eqns 3 variables

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The resistances found in the graphing part are not the actual Rab,Rbc,Rca. For example from the graph we got 5.66 which is not rca but rca-effective which is formed by ab,bc in series which are in turn parallel with ca.

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might be higher

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what was the level of inpho 2016 acc to all of you

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Solutions out How much do you expet

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39

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me 29

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Comment deleted Feb 02, 2016

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easier than previous ones, i'll say

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How was INAO 2016 for everyone?

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how was inao 2016 for 11th

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It went okay, I guess. Want to compare answers?

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Well , I gave INAO jr but paper was same. I expect 49-54. Any chance for OSCS ?

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Wait till the performance card comes. Last year's cutoff was only 37.5 so if you get what you expect, you'll almost surely be in.

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So would any one of you be glad to give any tips about inpho2016 and incho2016 @Ronak Agarwal @Pranjal Jain @Mvs Saketh

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Bhaiya if you dont mind can i ask your score in NSEP And NSEC

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Well actually both of them went way bad... Physics 138 Chem 134

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Are you eligible for the centre top 10% certificate?

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Is there a thread on discussion for 2015?

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where can i find students selected for apho 2015

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Could you give its full form ?

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asian physics olympiad

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Congratulations to all those who have been selected for the OCSC 2015. Personally, I never believed for an instant that the cutoff could be below 60 :P

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congrats to all who got selected.

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INMO results are declared.

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Cutoffs INAO 58 INPHO 55.5 INCHO 65.5

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cutoff 55.5 for inpho

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Damn, what about others?

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ya it will be very hard for those very near and below the cutoff to digest but take it lightly coz there are many other bigger things than this to succeed

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At what time will the results be out?

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Now the HBCSE page is also not opening!!

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i know, same here, they are updating the results , i am pretty sure

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same here, anxiety at its peak, and wonder whats taking them so long

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same here, just can't control myself.

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did you get selected in apho

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Congrats @Mvs Saketh !! Good luck for OCSC! Will you be attending camp? Just before JEE?

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i am sure that u r definitely in inpho camps

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Sure they will publish the result today? Saketh,do you when will KVPY guys publish the result?

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Is anyone getting access to HBCSE website?I cannot wait anymore

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http://www.downforeveryoneorjustme.com/http://olympiads.hbcse.tifr.res.in/

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Do you have any Idea why results aren't out till now?

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56 in inpho

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@Rishabh Garg How much did you get in INPhO?

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Could you guys advice me for NSEJS. Please tell resources you used . Please don't see the levels and say 'you are already ready'.

Thanks in advance ! \(\ddot\smile\)

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hey friends! please help me. I have got 41.5 in INPHO. However, from official solution, i should be getting around 50. Should i go for re-evaluation??

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Hey , I know It's off the Topic , But Please can anyone tell me from where I can get Previous Year free JEE MAINS ( AIEEE) paper's from , net . I did not get appropriate link !

I want specifically unsolved paper of AIEEE ! Thank's it will be great help!

@Pranjal Jain @Mvs Saketh

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Unfortunately i dont solve AIEEE past papers, only JEE main and advanced mock tests so i do now know of any online source

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Here are from 2007 to 2010

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please post your incho marks. mine is 51.5

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Hey guys, I just received my performance card. I got 56.5, and there's a friend of mine who got 59.5. What do you think the qualifying score will be?

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please visit http://inpho-blogspot-2015.blogspot.in/

as for the cutoff, no one can predict with certainty, but it can be predicted very well if we know some of the highest marks, so please help

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@ALL- it would be of great help if any one could findout a few marks from Andhra pradesh students and report, because they performed exceptionally well in NSEP and knowing their inpho marks will undoubtably reveal significant data,

Also some of you are from Mumbai, so i suppose you can find out your friends marks as well as mumbai has serious talent,

Lastly i would also request those from Kota which is the hub of IIT JEE prep ,@Pranjal Jain to kindly tell any marks (good ones espectially) they know of their friends,

That would be great help :)

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Sorry I was busy, I'll let you know in the morning.

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ah bro, can you please let me know :) i am a bit tensed

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thanks, :)

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a small mistake happened. Please remove 54 from your list. I've got slightly higher(56). But I've posted it already in the blog mentioned by you. Sorry!!

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ok, i shall update it,

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and hence i want you to please tell me some of their marks since you know ,

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But if you do get to know some marks, do share,

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In response to Arpan Banerjee if you haven't received your certificate yet you can send an email to nc_olympiad@hbcse.tifr.res.in and they will send it by post. that's how I got mine.

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Thanks :) It just came in the post.

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Hey I got 42.5 in INAO and 45.5 in INPhO!!. Are there any chances???? I know it is not at all a good score!!.

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@Pranjal Jain said the cutoff for INPhO will be 45... But who knows..

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You are raising my hopes. By the way, Thank you!!.

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I did not receive my certificate for qualifying NSEP. I got one for qualifying NSEC when i went to give INCHO but I didn't receive after INPHO. What should I do?

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I received my nsep certificate today by post.Perhaps you should wait......

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Did you get it along with your performance card or seperately?

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Is anyone getting above 54 @Pranjal Jain @Mvs Saketh @Uchiha Itachi @Arpan Banerjee @Vishal Srivastava @Mohan Nandakumar

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Did you get 54?

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what about you?

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yes

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can you guys check out https://secure.hbcse.tifr.res.in/ipho2015/ . do we participants have to complete this form or is it for the olympiad supervisors. if we have to do it then what is our registeration code? Also can someone please explain how the bending of light about massive bodies is explained by a classical theory(it is the ipho logo for this year)?(http://www.ipho2015.in/ipho2015/logo)

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It seems that the link you have given is for countries to register for IPhO which is to be held in Mumbai this year.

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I am expecting around 40-45 marks in INPHO and similar in INCHO.. Won't be able to make the cut i guess. Haven't received the performance card yet though. It hasnt come today and there's no post on sunday so i think it'll come by monday.

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please post your inpho marks at this blogspot so i can make a statistical analsys ,if you wish :) (when the card arrives)

http://inpho-blogspot-2015.blogspot.in/

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@Mvs Saketh how to find field due to induced charges in electrostatics? asked in inpho to calculate force between a metallic sphere and a point charge

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Yeah use image theory, we can treat this situation as equivalent to a charge at centre with magnitude q+qR/D and another image charge in the usual position (at LD=R^2 point) (or inverse point of charge (external)) , with magnitude -qR/D and now calculate force using coulumbs law,

This question requires a much deeper understanding of image theory which i fortunately had due to solving many problems regarding it already from online websites,, i believe those who do not know image theory or only know the basics of it will take too long to figure this one out and hence might leave it,, i hope that helps me :P

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thanks, it helped me

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what is the performance card of inpho dated?

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Well, it is said around 19th in site, but also told to wait till 27th before contacting, more importanly, u must have given the exact address of your home or wherever you want to recieve it and the recievers details (if its not you)

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are there 2 teams for this years' inpho?

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I think IPhO will be held in India this year. So yes, there will be 2 teams

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Its ipho, but so what ? why two teams, if its a home game?

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maybe but either way it is mentioned in site that only 35 students selected from inpho but then the site is outdated

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I got 49.5 in inpho . just received my performance card. is there any chance of selection??

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@Pranjal Jain what do you think would be the expected cutoff for INPHO, this year, i know u didnt give but u might have heard something or so, i got 68 in inpho, , but yes definitely cutoff will be above 50 or 60, or god forbid 70, in which case i am done, but its not predictable,

but ur thoughts?

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68, you got it quite nice marks( monster marks), I am here just regretting over myself.

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actually bro i commited silly mistakes, i mean i am also tired of telling this repeatedly, but you wont believe that like a stupid idiot, i plotted even graph incorrectly, and almost questions

answerpart i got wrong values , even though i had a calculator, (because i did not properly plot graphs) i really thank the checker for step marking because if it was objective paper, i would have got 45 or so,and well, trust me you would have found the paper pretty easy :) (except maybe the last question because it was not mentioned, assume Bohr quantisation, )

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this year's paper was difficult that last years' paper

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well bro both this year and last year paper was easy, except the black hole problem this year which i think is against the spirit of IPHO that sufficient information must be provided for questions out of syllabus,, and it is wrong to not mention that assume bohr quantisation in the question , because how can one know that a black hole proton atom behaves the same way as a hydrogen atom, also there were too many graphs this year, so indeed cutoff should be a bit lower,

but one thing is sure, it is not really so much paper dependent but more student dependent, if less people perform well, than low cutoff and so on, so no one can really predict, so just relax and wait till march 16

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But i rather think it was too experimental, and graphing doesnt check any ones innovation, rather electrostats problem was the most beautiful problem i think, but yes i agree one thing surely, that the values they gave sucked, i mean the numbers must be such that they cancel out and give a nice clean value so we know we are right and we can recheck, but the expressions in the electrostatic problems were very long and unfriendly,

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No idea but I am sure you are selected!! Congrats! =P

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i dont know bro, dont raise my hopes too much :P

because this year paper was bit easy , except for the black hole problem but i ended up doin too many stupid mistakes like forgetting to write a 2 in the denominator, plotting T vs t inplace of dT/dt vs t , and all, cost me much,

thanks to step marking though , well yes i can understand that ur statement is based on past year results like 60 percent cutoff in 2014 , and 50 percent was in 2013, but then it was 75 in 2012,,

i guess it all depends on my relative performance now, i hope others too have done silly mistakes like me :P

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is the answer to question 6(c) in inpho frozen solution correct?

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how much did u get, just curious, :) (in inpho)

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is the answer to 6(c) correct?

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havent received it yet?

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could inpho cutoff be above 53 and incho cutoff be above 50?????

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For INChO, yes

For INPhO, no

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according to tentative keys or corrected(yet to come) keys?

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What could be the expected cutoff for inpho and incho?

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INPhO- maybe 45, INChO- maybe 60

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but i think for inpho it wont be as low as 45 because this time it was for 100(total)

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thanks

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Comment deleted Feb 04, 2015

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Well, I qualified NSEA and NSEC, so I took INAO and INChO. Not expecting selection in either. Only 35 selections!

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Comment deleted Feb 04, 2015

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Did anybody get their INAO performance card??

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Yes, I got it.

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How much did you score??

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Can someone explain how the answer of Q4(a) is V2 = 4V/9 as given in the HBCSE answers?

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answer to that question is wrong

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