Recently Active Questions

if x=1 is a real root of ax2+bx+c=0 then show that 4ax2 +3bx +2c =0 has real roots ...

Is it possible to have a spherical drop of water that could evaporate without absorbing heat or losing internal thermal energy? Given data: Surface tension of water: 0.073 N/m Density of water: 1000 kg/m3 Latent heat of evapo ...

Q. conversion of cyclohexene to cyclohexanol can be easily achieved by....... a) NaOH + H2O b) Br2, H2O c) hydroboration oxidation d) hydroboration hydrolysis what is hydroboration hydrolysis?? ...

i first thought of applying online and so i have opened my id in jee website(but not sent the application nor paid the fee) but now i want to apply by off line so tell me will thr be any problem for me if have just id?????? ...

i first thought of applying online and so i have opened my id in jee website(but not sent the application nor paid the fee) but now i want to apply by off line so tell me will thr be any problem for me if have just id?????? ...

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find t: t=n+1Cn +n+2Cn +..............+2nCn ...

three missionaries and three cannibals need to cross a river in a boat that can hold only two people.the missionaries must be careful to never allow the cannibals to outnumber them on either shore. how can everyone cross the ...

Q1 Mercury is liquid at 0°C due to _________ and _________ Q2An element in 3d transition series shows 2 oxidn states x an dy which differ by 2 units.Find conditions between x and y for compound to be ionic and covalent Q3WHi ...

Q1 FeI3 doesnt exist becoz ? Q2 MnO2 dissolves in conc. HCl to form ? Q3 In which of the following ,color is due to charge transfer ? a)[Mn(OH)4]2- b)MnO42- c)MnO2 ...

Q1 Na2CO3 +Fe2O3→A +CO2 Q2 AgNO3→heat W+X+O2 X+ H2O→HNO2+HNO3 W+HNO3→Y+NO+H2O Y+Na2S2O3(excess)→Z+NaNO3 ...

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I know this is an easy one, but don't know why I am not getting the right answer. The extremeties of a diagnol of rectangle are (-4,4) and (6,-1). A circle circumscribes the rectangle and cuts an intercept AB on the y-axis. T ...

Cosider and tell what's wrong here..... -20 = -20 -36 +16 = -45 + 25 -81 +16 + 81/4 = -45 +25 + 81/4 (4 - 9/2 )2 = (5 - 9/2 )2 4 = 5 which is not possible..... ...

Ques) Suppose f(x,y) = 0 is the equation of the circle such that f(x,1) = 0 has equal roots (Each equals to 2) and f(1,x) = 0 also has equal roots (Each equals to 0 ). Then find the equation of the circle. ...

Here's the puzzle: A group of people live on an island. They are all perfect logicians -- if a conclusion can be logically deduced, they will do it instantly. No one knows the color of their eyes. Every night at midnight, a f ...

There are2 black hats and 3 white hats on a table. 3 men stand in a line such that the 3rd man can see the heads of the 2 bfore him, the 2nd can see the one bfore him only, and the 1st can see none. Another man came and rando ...

The major product P of the given reacn is :- *Image* This is not my doubt ...

Q1 Philosopher's wool when heated with BaO at 1100 C gives ? Q2Which managanese oxide is amphotseric ? Q3 copper (II) ions give redish brown ppt wth potassium ferrocyanide.Find formula of ppt. its Cu2[Fe(CN)6] naa ?? Q4 how t ...

Q1 Anhydrous Ferric chloride is prepared by ?? Q2 FeCl3.6H2O is actually ?? Q3 Ferrous and ferric ions may be distinguished by ? Q4 Ferric ions are estimated by ? Q5 Mohr Salt on oxidation with conc. HNO3 gives ? ...

If x=\left(16^{3}+17^{3}+18^{3}+19^{3} \right) , then x divided by 70 leaves a remainder of what? ...

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( 3 +tan1).( 3 +tan2).....( 3 +tan29)=? (angles are in degrees) Not for all the genius sirs here[1] ...

i just wanna confirm dat does NaNH2 converts internal alkyne to terminal alkyne??? ...

Ques) Hydrolysis of the following gave :- *Image* Here , 'X' should be what ?????????? ...

In nitroprusside ion the iron and NO exist as Fe(II) and NO+ rather than Fe(III) and NO. These forms can be differentiated by : (A) estimating the concentration of iron. (B) measuring the concentration of CN. (C) measuring th ...

(p + q)(p + r) ≥ p+ qr ...

p-Chloroaniline and anilinium hydrochloride can be distinguished by: (A) Sandmeyer reaction (B) NaHCO3 (C) AgNO3 (D) Carbylamine test ...

A solid body X of heat capacity C is kept in a an atmosphere whose temperature is TA = 300 K. At time t = 0, the temperature of X is T0 = 400 K. It cools according to Newton’s law of cooling. At time t1 its temperature is f ...

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