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If a sphere of bad conductor is given a charge then it is distributed on outersurface or inner surface?? ...
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1. How NO3- and PO3- differ structurally? 2. Explain why glucose forms oxime but glucosepentaacetate does not? ...
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1.. 1-x2 + 1-y2 = a(x-y) then dy/dx is a) (1-x2)/(1-y2) b) (1-y2)/ (1-x2) c) ( 1-x2)/(1-y2 ) d) 1-y2)/ (1-x2) 2. If y= cosec x (cot–1x) thendy/dx a. x/ 1-x2 b) -x/ 1+x2 c) x/ 1+x2 d) None 3. The tangents to the circle x2 + ...
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5. The solution of the differential equation cos2 xdy/dx+y = tan x is (a) y = tanx + ce–tan x (b) y = (tanx + 1) + cetanx (c) y = (tanx – 1) + cetanx (d) y = (tanx – 1) + ce–tanx 6. The solution of the differential eq ...
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2. 1-x2 + 1-y2 = a(x-y) then dy/dx is a) (1-x2)/(1-y2) b) (1-y2)/ (1-x2) c) ( 1-x2)/(1-y2 ) d) 1-y2)/ (1-x2) ...
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thnx avik ...
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1. If y= cosec x (cot–1x) thendy/dx a. x/ 1-x2 b) -x/ 1+x2 c) x/ 1+x2 d) None 5. If A and B are such events that P(A) > 0 and P(B) ≠1 then P( A/B ) is equal to a) 1– P(A∪B)/P(B) b) P(A)/P(B) c)1-P(A)/P(B) d)1-P(B/A ...
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Find the value of k so that the function f(x) = kx + 1, if x ≤ π = cos x, if x ≥ π Is continuous at x = π. ...
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If A is a non empty set, then R ⊂ A × A is said to be a relation on A. A relation R on 'A' is said to be (i) Reflexive if aRa, i.e. (a, a) ∈ R ≠a ∈ A. (ii) Symmetric if aRb then bRa i.e. if (a, b) ∈ R then (b, a) â ...
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1. ∫1/sin2x+cos2xdx = a) -2cot2x+c b) tanx-cotx+c c) 9+(sec2x)/2 d) 3-tan2x/2 e) (3-sec2x)/2 f) (tan2x/2)-5 2. If vectors a+b=vector c then vector a x b = a) c x a b) a x c c) b x c d) c x b 3. If the direction ratio of a l ...
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1.Statement I : gof : A → C is one one Statement II - gof : A → C is onto 2. let A nd B be two events such that P(A ∩ B) =1/4 and P(A)=1/2 and P(B)= 1/2 then A- A and B are independent events R- P(A ∩ B) ≠P(A).P(B) ...
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Molar conductivity?? specific conductivity ?? conductivity?? conductance?? are they same?? ...
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what is vacua junction? ...
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1. Account for the followiong a. CO2 is gas, but SiO2 is a solid b. (CCl4 is resistant to hydrolysis, but SiCl4 is hydrolysed 2. What is radius ratio ? What is its significance. ...
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1. Which of the following is least alkline *Image* 2. Formic acid when heated with H2SO4 gives (A) (COOH)2 (B) CH3COOH (C) C2H5OH (D) CO 3. Reaction H+ + OH– → H2O is— a) Very slow b) Slow c) fast d) Moderate 4. In DNA ...
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1. Statement-I : Benzoic acid is a weaker acid than formic acid Statement-II : Phenyl group when attached to carbonyl group becomes electron donating. 2. Statement-I : Pb4+ can be reduced rasily to Pb2+ Statement-II : Pb2+ is ...
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1. A substance A decomposes by first order reaction starting initially with [A] = 2.00 M, after 200mins [A] = 0.250 M. For this reactioin what is I + 1/2 II K? 2. Calculate the equilibrium const. for the reaction Fe+2 + Ce+4 ...
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wht is the hybridisation of boron in borax? ...
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1.Electric field intensity at a point depends upon a)Field Charge b) Test charge c) Permittivity of medium d) (Distance between point & test charge 2. Rydberg is used as unit of a) Wave no. b) Wave length c) Energy in atomic ...
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The adjoining figure shows tracks of three charge particles 1, 2, and 3 in uniform electric field E Give the Signs of three charges. *Image* ...
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A converging and a diverging lens of equal focal lengths are placed co-axially in contact find the power and the focal length of the combination. ...
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1.If the total number of neutrons and protons in a nuclear reaction is conserved, how then is the energy absorbed or evolved in the reaction ? Explain. 2. Compare the radii of two nuclel of mass numbers A1 & A2. ...
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A lens of focal length 15 cm is dipped in water. What is the new focal length given that ref index of glass wrt air is 3/2 and that of water wrt air is 4/3. If the lens is dipped in a liquid under what condition, the rays are ...
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COL I 1. Frequency of LC Oscillation 2. Mean Circuit power 3. LCR series 4. LCR resonant series COL II a) Resistive circuit b) Impedance c) I^2 Zcos φ d) 1/2piundrtLC ...
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If an electrolytic solution is diluted to 9 times then its conductance a) Inc. 9 times b) Dec. 9 times c) Remains same d) none ...
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1. By emission of which of the following element remains unchanged a) β^- decay b) γ decay 2. Two lens of power –15D and +5D are placed is contact co-axially. The focal length of equlvalent lens is (A) –10 cm (B) –20 ...
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1. Statement-I : The sum of mole fraction of all the components of a solutioin is unity. Statement-II : Mole fraction is temperature dependent. 2. Statement-I : Decrease in free energy comes spontaneons reaction. Statement-II ...
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An SN2 reaction at an asymmetric Carbon of a compound always gives a) An enantiomers of the substrate b) A product with opposite optical rotation c) A mixture of diastereomers d) Single stereoisomer ...
