Recently Active Past Iit Jee Question Questions

Match each of the diatomic molecules in column I with its property/properties in column II Column I Column II (A) B2 (p) Paramagnetic (B) N2 (q) Undergoes oxidation (C) O2- (r) Undergoes reduction (D) O2 (s) Bond order≥2 (t ...

For the reduction of NO3- ion in an aquous solution, E0 is +0.96V. Value of E0 for some metal ions are given below A) V2+ + 2e- -> V E0=-1.19V B) Fe3+ + 3e- -> Fe E0=-0.04V C) Au3+ + 2e- -> Au E0=+1.40V D) Hg2+ + 2e- ...

ABC and ABC' be two non congruen ttriangles with sides AB=4, AC=AC'=2√2 adn angle B=30°. The absolute value of the difference between the areas of these triangles is ...

for 0<θ<π/2, th esolutions of \sum_{m=1}^{6}{cosec(\theta+(m-1)\pi/4)}cosec(\theta+(m)\pi/4)=4\sqrt{2} is (are) A) pi/4 B) Pi/6 C) pi/12 D) 5pi/12 ...

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The Henry's law constant for the solubility of N2 gas in water at 298 K is 1.0×105 atm. The mole fraction of N2 in air is 0.8. The number of moles of N2 from air dissolved in 10 moles of water at 298 K and 5 atm pressur ...

In the following carbocation, H/CH3 that is most likely to migrate to the positively charged carbon is A) CH3 at C-4 B) H at C-4 C) CH3 at C2 D) H at C2 ...

Among the electrolytes Na2SO4, CaCl2, Al2(SO4)3 and NH4Cl, the most effective coagulating agent for Sb2S3 sol is (A)Na2SO4 (B)CaCl2 (C)Al2(SO4)3 (D)NH4Cl ...

Scientists are woring hard to develop... In the core of nuclear fusion reactor, the gas becomes plasma becasue of A) strong nuclear force acting between the deuterons B) Coulomb force acting between the deuterons C) Coulomb f ...

let f:R->R be a continuous function which satisfies f(x) = \int_{0}^{x}{f(t)dt} then the value of f(ln 5) is ...

The number of water molecules directly bonded to the metal centre in CuSO4.5H2O is ...

The correct statement about the following sugars X and Y are A) X is reducing sugar , Y is non reducing sugar B) X is non reducing sugar , Y is reducing sugar C) The glucosidic linkages in X and Y are alpha and beta respectiv ...

Among the following, state functions: A) Internal energy B) Irreversilbe expansion work C) reversible expansion work D) Molar Entrhalpy ...

The term that corrects for the attractive forces present in a real gas in the van der Waals equation is (A)nb (B)an2/V2 (C)-an2/V2 (D)-nb ...

Cv and Cp denote the molar specific heat capacities of a gas at constant volume and constant pressure respectivley. Then A) Cp-Cv is larger for a diatomic ideal gas than for a monoatomic ideal gas B) Cp+Cv is larger for a dia ...

coming to a very crude way of obtaining solution, substitute n=2 ...

Th emaximum value of the function f(x)=2x^3-15x^2+36x-48=0 on the set A={x|x2+20≤9x} is ...

A line with postive direction cosines passes through the point P(2,-1,2) and makes equal angles with the coordinate axes. The line meets the plane 2x+y+z=9 at point Q. The length of the line segment PQ equals A) 1 B) root 2 C ...

For a first order raction A-> P the temperature T dependent rate constant k was found to follow the equation log k = -2000/T + 6. The pre exponential factor A and the activatin energy Ea respectively are A) 1.0x106s-1 and ...

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Given that the abundances of isotopes 54Fe, 56Fe and 57Fe are 5%, 90% and 5% respectively, the atomic mass of Fe is (A)55.85 (B)55.95 (C)55.75 (D)56.05 ...

In the reaction 2X+B2H6 -> [BH2X2]+ [BH4]- the amines X are A) NH3 B) CH3NH2 C) (CH3)2NH D) (CH3)3N ...

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The centres of two circles C1 and C2 each of unit radius are at a distance of 6 units from each other. Let P be the mid point of the line segment joining the centres of C1 and C2 and C be a circle touching circles C1 and C2 e ...

The normal at a point P on the ellipse x2+4y2=16 meets the x axis at Q. If M is the midpoint of the line segment PQ, then the locus of M intersects the latus rectum of the given ellipse at the points \left(\ \pm3\sqrt{5}/2,\p ...

Paragraph for Question Nos. 13 to 15 p-amino-N,N-dimethylaniline is added to a strongly acidic solution of X. The resulting solution is treated with a few drops of aqueous solution of Y to yield blue coloration due to the for ...

I_n=\int_{-\pi}^{\pi}{\frac{\sin nx}{(1+\pi^x)\sin x}} .. n=0,1,2..... then A) In=In+2 B) \sum_{m=1}^{10}{I_{2m+1}}=10\pi C) \sum_{m=1}^{10}{I_{2m}}=0 D)In=In+1 ...

let p(x) be a polynomial of degree 4 having extremum at x=1,2 and \lim_{x\rightarrow 0}\left(1+p(x)/x^2 \right)=2 Then the value of p(2) is ...

if \frac{sin^4x}{2}+ \frac{cos^4x}{2}=1/5 then A) tan2x=2/3 B) \frac{sin^8x}{8}+ \frac{cos^8x}{127}=1/125 C) tan2x=1/3 D) \frac{sin^8x}{8}+ \frac{cos^8x}{127}=2/125 ...

The sum of first n terms of an AP is cn2, Then the sum of squares of these n terms is ...