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2 mirrors are inclined at an angle θ as shown in figure.Light ray is incident parallel to one mirror.The ray will start retracing its path after the third collision if: a)θ=45° b)θ=30° c)θ=60° d)all three *Image* ...
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1.species having highest electron affinity: a)O b)F- c)Cl- d)O- ans given O,shudnt it be O-? adding more.. 2.if a+3b+2c=12,then max value of 6bc(1+a)+a(3b+2c) is a)112 b)115 c)102 d)92 ...
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We know that electric current is not a vector. Then in Kirchoff's law,why do we take negative value of current from our calculations to have a direction opposite to the assumed direction? ...
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What is the course for IT in gate?is it based on the UG IT course or Computer Science course? ...
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Could anyone tell how to go for a review of Cbse answer sheet? have got only 72 in chem,cant think it cud be as bad as that..in the cbse site,am not being able to download the acrobat reader file containing the apllication to ...
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*Image* 2.Assertion Reason I at room temp O exists as diatomic molecule whereas S is solid. II the catenated -O-O- chains are less stable as compared to doubly bonded O2 molecule. ii think both are right and II explains I cor ...
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ADDED14.which of the following halogen acids is least basic a)HF b)HCl c)HBr d)HI ans given a shouldnt HI be the least basic(most acidic) among these due to the greater bond length of HI bond?plz clarify. 15.ortho and para H2 ...
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MORE ADDED1.A beaker containing water is balanced on a pan of a common balance.A solid of specific gravity 1 and mass 5 g is tied to the arm of the balance and immersed in the water of the beaker.The scale pan with the beaker ...
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Here is some info regarding polymers from wikipedia. 1.Natural rubber: Natural rubber is an elastomer (an elastic hydrocarbon polymer) that was originally derived from a milky colloidal suspension, or latex, found in the sap ...
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with very few days left for jee,what would be the right way of approach now? a)solve as many fiitjee and past iit ques papers as possible. b)keep revising the chapters again and again etc plz give ur opinion. ...
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Today is the last date for receiving aieee admit and i have not got it yet,as havent 2 of my friends.but in the city almost all of the rest have got the admit long back. should i procced according to the instructions in the b ...
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what is the effect of adding inert gas at constant pressure to a system? ...
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NEWLY ADDED QUESTIONS unsolved questions are underlined. 1.for what value of k the system of linear equations x+2y+x=1;x+3y+4z=k;x+5y+10z=k2 has solution?find the solution in each case. [roorkee 97] SOLVED 2.true/false(plz gi ...
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q1)let A={x1,x2,...,xm},B={y1,y2,...,yn} and f:A→B,n>=m 1.number of increasing function from A to B: a)mCn b)nCm c)mn d)nC1+nC2+.....+nCn 2.number of non decreasing functions from A to B 3.number of onto functions from A ...
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*Image* ...
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1.Pb,Sn are extracted from their ores by: a) C reduction and self reduction respt. b) self reduction and C reduction respt. c) electrolysis and self redn respt d) self redn and electrolysis respt (2004) 2. when Fe is dissolve ...
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Rounding up physics for jee: this thread is started with the intention of bringing together concepts,notes and details in physics fro jee for revision. would like to ask all for contributions. 1)In case of electron nucleus sy ...
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where can we know the centre of our aieee exam? kindly reply. ...
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How was it,everyone? doubts:FSF full form,difference between virus and worm. and plz giv outputs of the ones u remember. ...
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name the header files to which the following belong: a)abs() b)atoi() [whats that?] c)open() d)frexp() [whats that?] what are the probable type of questions from stacks and queues? plz reply as soon as possible!computer exam ...
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1 wrong question of increasing and decreasing functions(where the function itself was not given) assured 6 marks on attempting but still had a long and tiresome test and not a perfect maths test i wud hav wanted. how was urs? ...
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Magnetic dip at a pt is 60°.if the dip circle is rotated through an angle of 90° about its vertical axis,what is the new angle of dip observed? ...
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1. what type of waves are used in: a)photography in fog b)detecting crystal structure 2.A solution of Na in liquid ammonia at -33°C conducts electricity. On cooling the conductivity of this _______. 3.what are the reactions ...
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Give structure of H4P2O5. How to distinguish between Aniline and N-methylaniline? ...
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Could anyone suggest a site wfere we can get ALL the cbse ques papers for past 5 years from 2005 to 2009? ...
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1. write reaction of F2 with water. 2. write the ascending order of boiling pts of H2O,H2S,H2,H2Se,H2Te 3. Is mole fraction constant with change in temperature?if yes,why? 4. what is the promoter in contact process (was there ...
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suppose that the electric field part of an electromagnetic wave in vacuum is: E vector={(3.1 N/C)cos[(1.8 rad/m)y+(5.4*106rad/s)t]}i a)what's the direction of propagation b)find wavelength and frequency of wave c)what's the a ...
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multi answer correct: 1)which of these is true about binary liquid solution showing +ve deviation to raoults law? a)solute-solute interaction is stronger than solute-solvent interaction b)solvent-solvent interaction is strong ...
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Q1) The function f : R → R defined by f(x)=x3+x2 is (a) one to one (b) onto (c) one to one and onto (d) neither one to one nor onto Q2) The function f(x)= x2/|x| if x is not = 0 = 0 if x=0 (a) is not continuous at x = 0 (b) ...
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Q1) Which of the following complexing agents is used for the exact determination of end point of the titration between boric acid and NaOH? (A) EDTA (B) catechol (C) ethylene diamine (D) terpyridine Q2) How many moles of N2 w ...
