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A reversible heat engine takes heat from two sources of 600k and 900k, does work equal to 150 joules and rejects 120 joules of heat into sink at temperature of 300k, find the heat supplied by individual sources? ...
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cost of two year coaching classes ---- Rs.120000(approx.) cost of correspondance course ---- Rs.15000(approx.) cost of application form of iit ----- Rs.1000 cost of postage to send form ----- Rs. 30 The cost feeling to bang y ...
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1)if *Image* then the range of f(x) is? 2)if the function f(x)=sinx+cosax is periodic, then a must be a)a rational number b)an integer c)any real number d)irrational ...
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will friction behave as a conservative force in quasi-static process? ...
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a manometer contains a liquid of density p. the difference inthe levels when the manometer rotates with a constant angular velocity w about one of its vertical limbs is?(the two limbs are separated by distance 'a') a)w2a2/2g ...
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if a,b and c are unit vectors, then *Image* does not exceed? ...
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q-1) each carbon atom is sp3 hybridised in diamond. the no. of tetrahedral voids occupied in diamond are? a)25% b)50% c)75% d)100% q-2)in what mass of water must 25g of CuSO4.5H2O be dissolved to obtain an 8% solution of CuSO ...
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1)13.44 g cucl2 is dissolved in 1 kg of water. what is the elevation in boiling point?kb=0.52 kg k/mol ans-0.16 2)which of the following statements are correct? a)the coordination no. of each type of ion in cscl is 8. b)metal ...
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*Image* ...
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two numbers a and b are chosen from the set {1,2.......25}. the probability that a4-b4 is divisible by 5 is? ans: 2/3 ...
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1)the mean and the variance of a binomial distribution are 4 and 2 respectively.then probability of 2 successes is a)37/256 b)219/256 c)128/256 d)28/256 2)n persons sit on a round table. the odd two against two specified pers ...
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1)excess KCN is added to cupric salt and H2S is passed through the solution. no black CuS is precipitated because Cu is present in the solution as a)[Cu(CN)6]4- B)[Cu(CN)4]3- C)[Cu(CN)4]2- D)NONE. 2)Co3+ forms a complex with ...
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of the following complexes those which are conductors in aqueous solutions are? 1)CrCl3.3NH3 2)CrCl3.4NH3 3)CrCl3.5NH3 4)CrCl3.6NH3 this one is multiple correct choice. ...
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1)gallium forms GaCl2. this is because a)large size of gallium b)very high hydration energy of Ga(III) ion. c)gallium can form both univalent and trivalent ions. d) high electronegativity of chlorine. 2)which is stronger redu ...
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this is an example question from the ncert textbook- "Why is Cr2+ reducing and Mn3+ oxidising when both have d4 configuration? Cr2+ is reducing as its configuration changes from d4 to d3, the latter having a half-filled t2g l ...
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which of the following is used in toothpaste? 1) Mgcl2 2) MgCO3 3) CaSO4 4)Cacl2 ...
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1) on introducing a catalyst at 500k the rate of 1st order reaction increases by 2 times. the activation energy in the presence of a catalyst is 5 kj/mol. then what will be the Ea in the absence of the catalyst.? a)9.6 kj/mol ...
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*edited* ...
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the bob of a stationary pendulum is given a sharp hit to impart it a horizontal speed of 3gl . find the angle rotated by the string before it becomes slack? ans:cos-1 1/3 ...
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a small heavy block is attached to the lower end of a light rod of length l which can be rotated about its clamped upper end.what minimum horizontal velocity should be given so that it moves in a complete circle? ...
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i am getting a lower nit based on my state rank. my question is that can i give aieee next year after joining this lower nit so that i can aim for better nit next year????? please help as it is not mentioned anywhere in broch ...
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if ab=2a+3b, a>0,b>0 then minimum value of ab is??? ...
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1)\lim_{x->0}xlogsinx \; 2) \lim_{x->0} (cosecx)^{^{1/logx}} 3)\lim_{x->0} ((1+x)^{^{1/x}}-e)/x 4)\lim_{x->0}[(sinx)^{1/x}+ (1/x)^{sin x}] ...
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1)find the value of\sum_{r=1}^{k}{(-3)^{r-1}}}3n_{C}_{2r-1} where k=3n/2 and n is an even positive integer. ...
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let x be any real number, then, x2= x+x+x.....upto x terms differentiating both sides wrt x 2x= 1+1+1.......upto x terms or,2x=x or,2=1. find where is the mistake? forgive me if you think it is a stupid question.it was asked ...
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∫sin-1 x/(a+x) limit from 0 to a ...
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let ABCD be a quadilateral with area 18 ,with side AB parallel to CD and AB=2CD.let AD be perpendicular to AB and CD.if a circle is drawn inside the quadilateral ABCD touching all the sides, then its radius is ...
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area of triangle formed by the lines x+y=3 and angle bisector of pair of straight lines x2-y2+2y=1is? ...
