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For how many positive integers n is (1999+ 1/2)n + (2000+ 1/2 )n an integer? ...
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Two positive integers are chosen. The sum is revealed to logician A, and the sum of squares is revealed to logician B. Both A and B are given this information and the information contained in this sentence. The conversation b ...
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Many many happy returns of the day Sir. Thank you very much for all that you are doing for us! [1] ...
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If there were no atmosphere the average temperature of the earth's surface would be... a. lower b. greater c. same as now d. can't say ! ...
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If a stick is broken into two pieces at random, wats the average ratio of smaller length to the larger? ...
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A rail road numbers its locomotives in order 1,2,..,n. One day u see a locomotive adn its no. is 60. Guess how many locomotives the company has? ...
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Do all teh four C-H bonds in methans have equal bond energy? Coz ans given is dat none of them hav the same energy! But i think all of them do hav the same enrgy... If not pls temme why.. ...
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A body is allowed to slide on a frictionless track from rest position under gravity. The track ends into a circular loop of diameter D. What should be the minimum height of the body in terms of D so that it may complete the l ...
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Rate of a reaction can be expressed by Arrhenius equation as: k=Ae-E/RT In this eqn, E represents? a...... b...... c. the energy above which all the colliding molecules will react. d. the energy below which colliding molcules ...
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If a constant force acts on a particle, its acceleration will... a. gradually increase b.gradually decrease c. remain constant d. be undefined! ...
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1. 0.1 mole of CH3NH2(kb=5*10-4) is mixed with 0.08 mole of HCl and diluted to 1 L.What wil b the H+ concentration in solution? a. 8*10^-2 b. 8*10^-11 c. 1.6 *10^-11 d. 8*10^-5 ...
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HCl, HBr, HI have acid strength in order in aqueous solutions as:??? I thought it should be HI>HBr>HCl, but answer is given to be HI=HBr=HCl Could sumbody pls explain? ...
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Formation of free radical is easiest in: a.CH3CH2Cl b.ch3ch2Br c. ch3ch2F d. ch3ch2I ...
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If a chord is taken at random in a circle, what is chance that its length is more than the radius of the circle? Pls provide method. ...
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1.Two circles are constructed taking two sides of a triangle as diameter. What is the probability that these two circles intersect on third side of triangle? 2.In a MAMCQ test, der r 4 alternatives out of which 1 or more r co ...
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1. If integers m and n are chosen at random between 1 and 100, then the probability that a number of the form 7m+7n is divisible by 5 is, a.1/4 b.1/7 c.1/8 d.1/49 2. A six faced fair dice is thrown until 1 comes, then probabi ...
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The equations of 2 waves r, y1=acos(0.5Ï€x-100Ï€t) y2=acos(0.46Ï€x-92Ï€t). Find: (i)Number of times intensity is max in a time interval of 1 sec. (ii)No. of times y1+y2=0 at x=0 in 1 sec. ...
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BaSO4 and H2-Pd are used in both Lindlar's catalyst and Rosenmund reduction. But if both acid chloride and alkyne group are present in the same compound which reaction will be favoured? ...
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Q2 Which of the following is true for a galvanic cell? a) electrons flow from anode to cathode b) reduction occurs at anode c) oxidation occurs at cathode d) all of the above are correct Your Answer: (a) Correct Answer: (d) S ...
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\int_{0}^{[x]}{a^t/a^[^t^]}dt (a>0), where [] denotes greatest int function is? ...
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A man had been sentenced to death. The man has 60 seconds to say something if he says nothing he will be killed in the most horrible way possible. If he tells the truth he will be shot & if he lies he will be hung. The man su ...
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( 5 +2)1/3-( 5 -2)1/3 is a. Irrational no. b. Prime no. c. Rational no. d. Natural no. ...
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This is a famous 'situation puzzle'. Those who already know the answer pls let others try! An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is s ...
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Q5 The standard reduction potential of Li+/Li, Ba2+/Ba, Na+/Na & Mg2+/Mg are -3.03, -.73, -2.71 and -2.37 volt respectively. Which one is the strongest oxidizing agent? a) Na+ b) Li+ c) Ba2+ d) Mg2+ Your Answer: (c) Correct A ...
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In my boards exam a question read....... For a first order reaction, the half life period is dependent on? a.catalyst b.temperature c.square root of conc. of reactants d.rate constant Almost all the students wrote rate consta ...
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If we find the magnetic field at a point due to a straight finite wire carrying current by Ampere's law, we get the same expression as for an infinite wire which is μ0I/2πr which is absurd bcoz for a finite wire it is given ...
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There are 6 points in a plane such that no 3 are collinear. Each point is joined to another by a coloured line which is either blue or red. Find the minimum no. of monochromatic triangles. ...
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There was a barber in a village. He used to shave the beard of only those people, who didnt shave their beards of their own. So, according to his rule, cud he shave his own beard or not???? ...
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Find the point in the interior of a triangle such that summation of its distances from vertices is minimum. ...
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A man takes either 1 step forward or 2 steps forward. If a ladder contains 10 steps, find how many no. of ways can he climb? ...
