Recent questions tagged other

(chatquestion)...14. The potential energy of a particle of mass m is given by SEo,0sxs1 U(x) = 0, x>1 & 2, are the de-Broglie wavelengths of the particle, when 0sxS1 & x >1 respectively. If the total energy of the particle is 2E, the ratio will 72 be (1) 2 (2) 1 (3) 2 (4) -/2...(Anyone ?)

asked Feb 29, 2020 by balaji.thirumalai

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(chatquestion)...SI unit. (b) Derive an 1. What is the effect on self long solenoid of length N number of turns. conductance when a rod is inserted in the coil if the rod is (a) Iron (b) Copper 1. Show that magnetic 2. Find energy density in coil. rrent I in a coil of self en two long coaxial 1. sion for the mutual How is the mutual inductance of a pair of coils affected when

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Defe Page 20aH5-OH 9 HCL 0GH5 Diertyleaudeomat SH30 CL Liethyleauhonati faliomaiat. non- Hyduely'is of 2. CHCI3 CHCla + 3 KOH H-e 3KOH > H-C-ok + H20 4ICOOH 3. сна Ag /A CHE CH + CL H-C + GAg + CL Heat Gagel ootylent CHECH + CH3-CC13 A9-Paudee CH3 -C=C-CH3 CL CH3 - C-C CL e-CHz > CH3-C=C-CH3 + 6Agcl 3-Butyne 4. Reartion uith. nitu vacis (+HNO3): CL HO-NOn Cl-c-NO2 -Ha0 Toou gas (Niluepirnin) 5. Renchion uuith acctone: N addition CH3 + OH-Cct CHЗ— С. CH3 chlomitone...(ye polyhalogen compounds ka jo bhi reactions h kya isko bhi yaad krna hoga kya I mean imp. h kya ye?

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...(3) Toxoid 112. If a pregnant woman is suffering from syphilis infection then after delivery which type of antibodies may be present in her new born :- (4) Both (1) and (3) (3) 112. यदि के (1) (1) IgM only (2) IgG only (4) IgA and IgG (3) (3) IgM and IgG ATS provides: 113 113 AT...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...(3) Higher vertebrates (4) Lower vertebrates 116. Non specific immunity includes all of these except (3) 116. 31f (1) Lymphocyte (3) Interferons (2) Macrophage (4) Neutrophils (1) (3)...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...(iii) How does the X vary with frequency of the Show this variation graphically. (iv) Draw the phasor diagram for the device X. CBSE 2018 49. A device X is connected to an AC Source, V = V, sin ot. The variation of voltage, current and power in one cycle is shown in the following graph. AAY (i) Identify the device X. (ii) Which of the curves A, B and C represent the voltage, current and the power consumed in the circuit? Justify the answer. (iii) How does its impedance vary with frequency of the AC source? Show graphically. (iv) Obtain an expression for the current in the circuit and its phase relation with AC voltage. All India 2017

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...137. 'Dysbarrism' occurs in deep sea divers due to (1) Sudden increase in P at the base of the sea N2 12) Sudden loss of pressure on the body while coming towards sea surface (3) Insolubility of N, in blood at the base of the sea (4) Higher affinity of Hb for N, in comparison to O, 138 The collansing of alveoli due to increas

asked Feb 28, 2020 by balaji.thirumalai

1 answer

(chatquestion)...T=20 +273 k (4-%) %3D log K2 Ki 64 = 35 +273 K %3D 2.303 xR fuom quo, - K2 = 2 KI (teuf coefind]...(is equation pr values daal kr find kro)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...25.) What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C ? (R = 8.314 J mol K-) %3D (1) 15.1 kJ mol-1 (3) 269 kJ mol1 (2) 342 kJ mol-1 (4) 34.7 kJ mol-1 AIIMS 2013

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Rank the three compounds in order of decreasing acidity -NH3 O,N- -NHa CHз -NH3 (1) (II) I, II, II III, I, I II, III, I II, 1, II...(Why is I) more acidic than III))

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...om/test/VGVzdEF0dGVtcHQ6NTYuNTI4/questions/ (Result Question 13 of 20 The number of electrons in an atom with atomic number 105 having (n+ ) = 8 are: (a) 30 (c) 15 (b) 17 (d) unpredictable We see that you have not attempted question, Please mention reason from below. Conceptual Mistake Time Management Not Stuc Explanation: (a) s-orbitals being spherical and thus, non-directional. (a) 25% (b) 23% (c) 15% (d) 40% earch bp

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Question 3 CH CH-N CH2=C CH2-CH=N...(Find the least contributing resonance structure)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Questiol 3 CH2=CH-N CH2 CH- CH2=C

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Without expanding show that (a* +a)° (a-a)° 2. (e +c)° (c-c*)°

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...20. Draw wave front from a) a point source at finite distance b) a point source at infinite distance c) a linear source.

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...HCI(leq) HI(leq) C, C is :- 40°C CI (1) ČI (3) Cl CI (4)...(Guys plz iska solution btado)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Me C = 0 + H,N – C – NH – NH, Н Me- 70. 70. Н° which is incorrect :- निम्न (1) The reaction completes through addition elimination mechanism. (1) = Me C = N– C – NH – NH, is formed as Н (2) (2) product (3) The reaction is an example of condensation reaction (3) (4) None (4)...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...Which of the following compound does not give ppt with NaHSO, : (1) С, Н. СНО (2) С, Н.СОСН, 68. 68. f (3) CH,COCH, (4) CH,CHO...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...निम Which of the following compound will not give test with Tollen's reagent : 50. 50. देत Снон Н Н н СН,ОН н (1) (1) Но, CHOН он н Н НО Н ОН ОН н CH,ОН CH,ОН Н Н Й Н н (2) НО (2) ОН Н ОН Н ОН ОН Н ОН ҫH,ОН ҫH,ОН НО Н Н Он (3) Он Н Н Н Он Н Н (3 Н ОН Н ОН НОН,С Н (4) Н НО НО ČH,OMe (4 ОН Н Which is not an example of tranquiliser. Сы...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...45. In the diagram, the input is across the terminals B and D and the output is across the terminals A and C, then the output is :- in (1) Zero (2) Same as input (3) Full wave rectifier (4) Half wave rectifier...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...(3) 10² A (4) 2 x 10-3 A 31. An air bubble in water bahaves as a (1) converging lens (2) diverging lens (3) plane mirror (4) concave lens

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...178. How many of the following is/are correct matching ? Antibody Number of Paratope a IgG IgM 10 IgE d IgA 4 IgD 10 (1) Two (2) Three (3) Four (4) Five...(Hlp)

asked Feb 28, 2020 by balaji.thirumalai

2 answers

(chatquestion)...3. For the reaction 2Algi + 2B,l) = the equilibrium constant, K, at 300Kis 16.0. The value of K, for 2AB,g) Alg) + B,lg) is : (A) B (C) 0.125 (B) 0.25 (D) 32

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...become equal. 2. If concentration is expressed as mol L, the equilibrium constant, K for the reaction : 4NO,lg) + 0,la 2N,0,lg) has the units: LA mol L (C) mol L (B) mol L- (D) no units....(Solution of this MCQ)

asked Feb 28, 2020 by balaji.thirumalai

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(chatquestion)...6. The figure shows the field lines of a positive charge. Is the work done by the field is moving a small positive charge from Q to P positive or negative? Foreign 2014

asked Feb 28, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Concentrated aqueous sulphuricacid is 98% H2 S04 by mass and has a density of 1.80 g/mL.Volume of acid required to make one litre of 0.1 M H, SO, solution is 4. यदि सांद्र जलीय सलफ्यूरिक अम्ल का द्रव्यमान प्रतिशत 98% H, SO है और घनत्व 1.80 g/mL.है तो अम्ल के कितने आयतन की आवश्यक होगी एक लीटर 0.1 M H> विलयन बनाने में SO4 A. 16.65 mL B. 22.20 mL C. 5.55 mL D. 11.10 mL

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...A ball of mass 1 kg is dropped from a tower. Find the power of gravitational force at time t = 2 second. एक बॉल जिसका द्रव्यमान 1 किलोग्राम है को एक टावर के शीर्ष से गिराया जाता है तो समय t = 2 सेकंड पर गुरुत्वीय शक्ति ज्ञात करें A. 100 W B. 200 W C. 300 W D. 400 W...(@aayanshi013)

asked Feb 27, 2020 by balaji.thirumalai

1 answer

(chatquestion)...11. During the kinetic study of the reaction, 2A + B →C+ D, following results were obtained:- [A]/mol L (B]/mol L Initial rate of Ex. No. formation of D/mol Lmin 1 6.0 x 10-3 7.2 x 10-2 2.88 x 10-1 2.40 x 102 Based on the above data which one of the following I 0.1 0.1 II 0.3 0.2 III 0.3 0.4 IV 0.4 0.1 is correct ? (1) rate = k[A][B]² (3) rate = k[A][B] (2) rate = k[A]°[B] (4) rate = %3D

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...gonas, m=-4 m=-ve → slope 4 (y= m + V=-4x+3 Vo 3(44+3)-(-4) a = 16x-12 ME-Ve e=t...(slope pehle find krnge phr)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...The rate constants k, and k, for two different reactions are 1016 e-2000/T and 1015 e-1000/T respectively. The temperature at which k, = k, is 3. (2 %3D 2000 (1) K (2) 2000 K 2.303 1000 -K (3) 2.303 (4) 1000 K (4 4. The bromination of acetone that occurs in acid 8. Н

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...A) B) C) D)...(Velocity distance graph given find acc distance graph)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...-Scm Find out magnetic field at point O ? T x 10-5 T (2) t x 104 T (3) t x 10-1 T (4) 10-5 T 67. A spirally coiled metallic wire is hanged from one end to a rigid support. Initially the wire has no current. Suddenly current is passed through the wire then it will :- (1) oscillate (2) contract (3) expand (4) no effect NEETIIGI 2017...(ques 67 ?)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...The graph shows the variation of voltage V across the plates of two capacitors. A and B versus increase of charge Q stored on them. Which of the capacitors has higher capacitance? Give reason for your answer. 3 VA

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...Conchy Schwng Sachwon (a,b,+ arb,t0sky)<(GQ"s.)(hitb, s-)...(Is there any specific condition when this inequality becomes equality except putting zeroes)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...(D) [2, co) 2x – 3x? –12x +6 23. Let a, neN such that a 2 n then Va +1-Va is always (A) less than 3n2 1 (B) less than (C) more than (D) more than 4n2 2n 24 If P' (x) > 0, V x e R, f '(3) = 0 and g (x) = f (tan? x -2 tan x + 4), 0 <x <÷, then g (x) is TC

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...x,+x, +...+x, f(x,)+f(x,)++f(x.) where all x, eR are independent to each 66. Let f other and neN. If fx) is differentiable and f'(0) a, f(0) b then f'(x) is equal to (A) a (C) b (D) ab (B) 0 Let f(x) x²-bx + c, b is an odd positive integer, f(x) 0 have two prime numbers as roots and b+c = 35. Then the global minimum value of f(x) is 67. 183 81 173 (B) 16 (A) (C) 4. (D) Data not sufficient 4 68. If f(x) x' +2bx + 2c² and g(x)=-x'-2cx +b such that min (f(x)) > max (g(x)), then the relation between b and c is (A) No real value of b and c (B) 0<c<b/2 (C) ck|b|V2 • (D) |c/>|b|/2 N characters of information are held on magnetic tape, in batches of x characters each; the batch processing time is a+Bx seconds; a and B are constants. The optimal value of x for fast processing is 69 maan (A) (B) (C) (D) 70. Equation of tangents to the curve y =...(66 and 69)

asked Feb 27, 2020 by balaji.thirumalai

1 answer

(chatquestion)...The dmerence between the greatest and least value of the expression (sin-x) + (cos "x)¯ 9n2 (B) 8. 117 (D) (A) T (C) 44. a?, b? Let 3=1, then the minimum value of a? x² + b?y² is equal to y (A) aª+b* (B) a°b² (a² + b°) (C) ab (D) (a² + b²)²...(44 anyone)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...P. At 10°C the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110°C this ratio is :- 10 283 383 (1): 110 (2) (3) x X- 383 (4) 283 GMODULE 03\01-THERMAL PHYSICS\o:

asked Feb 27, 2020 by balaji.thirumalai

1 answer

(chatquestion)...4. The heart of man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6x10°kg/m³ and g = 10m/s² the power of heart in watt is [AIPMT 2015] (a) 2.35 (b) 3.0 (c) 1.50 (d) 1.70

asked Feb 27, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A non-conducting solid sphere of radius Ris charged uniformly with charge of Q. If electric potential at centre of sphere is considered zero, then electric potential on surface of sphere would be K = Απεο KQ R KQ (2) 2R KQ (3) KQ (4) 2R

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...Radius of the wiie = R,. Gay we need to Calculate B at the polut p, distance r %3D from the ceutre. Cutreut in the were = 1. 1 I. %3D in side of nadios nai-I.x R2 B,at P = Mo! Ho I. MoI n %3D %3D Bxr in side the wine. B at 8 %3D * Ba - outside the wire. T=R

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...If power consumptions in R1, R, & R, are the same 1. then what will be the relation between them ? ww R, R, R, 96. (1) R, = R, = R3 (2) R, = R3 = 2R, - (3) R2 = R3 = 4R, - %3D (4) R, = R, = 4R3 %3D 02-EXERCISE.P65 ww...(Physics)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...So; Deted not complete うい) (1,0) Geo vocaut pr orbitel spz Back Bonding.

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...electron's acceleration. 2 A wire of length 0.655 m carries a current of 21.0 A. In the presence of a 0.470-T magnetic field, the wire experiences a force of 5.46 N. What is the angle (less than 90°) between the wire and the magnetic field? 3 The resistance per unit length of a piece of copper wire is 5.90 x 10 0/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.140 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coil. 4. Two parallel wires 200 mm apart carry currents in the same direction of 5.0 A. Find the magnetic field between the wires, 50 mm from one of them and 150 mm from the other. 5. A charge of +1.0 x 10 C is moving at 500 m/s along a path parallel to a long, straight wire and 100 mm from it. The wire carries a current of 2.0 A in the same direction as that of the charge. What is the magnitude and direction of the force on the charge?...(3,4,5.. Anyone)

asked Feb 27, 2020 by balaji.thirumalai

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(chatquestion)...Questions and Problems A 200-kg load is hung on a wire having a length of 4.00 m, cross-sectional area0.2 x 10-10 N 10- m2, and Young's modulus8.0 x m2 What is its increase in length? A sieel wire of diameter 1 mm can support a tension of 0.2 kN. A cable to support a tension of 20 kN should have diameter of what order of magnitude? 3. A 30.0-kg hammer strikes a steel spike 2.30 cm in diameter while moving with speed 20 0 m/s. The hammer rebounds with speed 10.0 m/s after0.110 s. What is the average strain in the spike during the impact? 4. If the shear stress in steel exceeds4.0 x 10°N/m2, the steel ruptures. Determine the shearing force necessary to (a) shear a steel bolt 1.00 cm in diameter and (b) punch a 1.00-cm- diameter hole in a steel plate 0.500 cm thick. 5. Lead has a greater density than iron, and both are denser than water. Is the buoyant force on a lead object greater than, less than, or equal to the buoyant force on an iron object of the same volume? 6. When an object is immersed in a liquid at rest, why is the net force on the object in the

asked Feb 26, 2020 by balaji.thirumalai

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(chatquestion)...Which one of the following options correct explains their respective relationships? XXXX Time Time Time A (a) A- Predation, B- Parasitism, C-Interspecific competition. (b) A- Parasitism, B- Predation, C- Interspecific competition. (c) A-Predation, B-Parasitism, C-Symbiosis. A- Predation, B- Parasitism, C- Commensalism. Population

asked Feb 26, 2020 by balaji.thirumalai

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(chatquestion)...nce. R R R, R [3.83(a)] This last equation relating the four resistors is called the balance adition for the galvanometer to give zero or null deflection. The Wheatstone bridge and its balance condition provide a practical thod for determination of an unknown resistance. Let us suppose we re an unknown resistance, which we insert in the fourth arm; R is at known. Keeping known resistances R, and R, in the first and d arm of the bridge, we go on varying R, till the galvanometer shows l delection. The bridge then is balanced. and from the balance ition the value of the unknown resistance R, is given by, R R, =R, [3.83(b) R A practical device using this principle is called the meter bridge. be discussed in the next section. Example 3.8 The four arms of a Wheatstone bridge (Fig. 3.26) have the following resistances: AB = 1002, BC = 102, CD = 52, and DA = 602. 1-I 1000 109 152 602 I+I, 10V FIGURE 3.26

asked Feb 26, 2020 by balaji.thirumalai

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(chatquestion)...Pre-Medical: Physics 22. Current I is flowing in infinitely long wire. Which of the following graphs represents the variation of B w.r.t. axial distance ? soft 01 16 BA BA tic net ec of of (2) BA (3) (4) charged narticle is projected from A in...(??)

asked Feb 26, 2020 by balaji.thirumalai

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(chatquestion)...(1) LEIU ss 10 gm and length 25 cm is 7) prings as shownin figure. The by 4 cm. When a 20 ampere At very close point on the axis of a current carrying circular coil (x<<<R) of radius 'R', the value of magnetic field decreses by a fraction of 5% with respect to centre value. The position of the point gh the rod it rises by 1 cm. etic field assuming accelera- be 10 m/s2. from the centre of the coil is :- R (1) V10 2 T30 X. R (3) 50 (4) V150 A circular conducting loop is connected by a battery according to figure. The length of ABC and ADC is l, and l, respectively then which is correct :- A' is rigidly fixed and an 8. placed directly below and B' remains suspended in...(ques 7..)

asked Feb 26, 2020 by balaji.thirumalai

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(chatquestion)...29. stand a pressure of 1 x 10° Pa. cylinder = 1800 K). Which of the following statement is true? (A) The cylinder will burst before melting (B) The cylinder will not burst before melting (C) At 1800 K the pressure inside the cylinder is 5 x 10° Pa (D) He gas will solidify at 1800 K 30. Which of the following gas has larger value of Vander Waal's constant 'b'? (A) NH3 (B) N2 (C) N3H (D) N¿H4 A porous cup filled with hydrogen gas at atmospheric pressure is connectec which has one end immersed in water. Water in the tube 31. (A) will rise (C) will remain at same level (B) will fall (D) cannot be predicted. idontical exnerimental conditions which of the following pair of gase...(30)

asked Feb 26, 2020 by balaji.thirumalai

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