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(chatquestion)...(26./If f(x) = x-[x], x(± 0) eR, where [x] is greatest integer less than or equal to x, then the number of solutions of f(x)+ f 1(2)-- 1 are (1) 0 (2) 1 (3) infinite (4) 2

asked Apr 19, 2020 by balaji.thirumalai

1 answer

(chatquestion)...5. Find the remainder when the polynomial is divided by (x-1)(x-2), if it leaves the remainder 2 when divided by (x-1) and 1 when divided by (x- 2) (1) 3-x (2) x-3 (3) 0 (4) None of these

asked Apr 19, 2020 by balaji.thirumalai

0 answers

(chatquestion)...(1+x²) dx 3-4/2x+4x

asked Apr 19, 2020 by balaji.thirumalai

0 answers

(chatquestion).... The inequation 372 >1 for all x belongs to 3 (1) [0, 64) (2) (0, 64] (3) (81, o) (4) none of these

asked Apr 18, 2020 by balaji.thirumalai

0 answers

(chatquestion)...The roots of the equation xX = /x* are %3D (1) 0 and 4 (2) 0 and 1 (3) 0, 1 and 4 (4) 1 and 4

asked Apr 18, 2020 by balaji.thirumalai

1 answer

(chatquestion)...21. x, [x], {x} are in G.P. then x equals V5 -1 (1) V5 +1 (2) 5 +1 (3) (4) none of these

asked Apr 18, 2020 by balaji.thirumalai

0 answers

(chatquestion)...A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is:- (1) 5 :1 (2) 5:4 (3) 3:4 (4) 3:2

asked Apr 18, 2020 by balaji.thirumalai

0 answers

(chatquestion)...4. A farmer wants to plant coffee and potatoes. Coffee needs 3 men per hectare and potatoes need also 3 men per hectare. He has 48 hired labourers available. To maintian hectare. of coffee he needs 250 shillings while a hectare of potatoes costs him 100 shillings. Find the greatest possible area of land he can sow if he is prepared to use 25,000 shillings. 5. A technical school is planning to buy two types of machines. A lathe machine needs 3m of floor space and a drill machine requires2m2. Thetotalspace available is30m2. The costofone lathe machine is 25,000 shillings, a drill machine costs 30,000 shillings, and the school can spend not more than 300,000 shillings. Find the greatest number of machines the school can buy. 6. A farm is to be planted with wheat and maize while observing the following constraints:

asked Apr 18, 2020 by balaji.thirumalai

1 answer

(chatquestion)...nade 5. There are counters available in 3 Ехample 7. different colours (atleast four of each colour). Counters are all alike except for the colour. If 'm' denotes the number of arrangements of four counters if no arrangement consists of counters of same colour and 'n' denotes the corresponding figure when every arrangement consists of counters of each colour, then find the value of m/n.

asked Apr 18, 2020 by balaji.thirumalai

1 answer

(chatquestion)...meny ways Example 12. How many ways are there to place 2 identical kings on an 8 x 8 chessboard so that the kings are not in adjacent squares? Solution A row can be chosoni

asked Apr 18, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A-bone timer lousists oL capacitors in parallel. CF1.5MF,'c2=1:5 UF snd a resispor R=10M-2 înitial Uherge on C 20. Po=30M0 C has no initial Charge fanle weill diffuse shen tueo t voltage aoio pairof copociters drps toa facter After houo long, leombe weill diffuse?

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Finel X? X²-40

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...ELECTROSTATICS 110. Find the capacitance across X and Y: 21 Y. 7C 3C (2) 3 (3) 5C (4) 2C (1)

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Pre-Medical : Physics ALLEN 75. lfa capillary of radiusris dipped in water, the height 82. Water rises to a height h in a capillary at the suf of earth. On the surface of the moon the heightdi water columm in the the same capillary wil be ALLEN of water that rises in it is h and its mass is M. If the क radius of the capillary is doubled the mass of water that rises in the capillary will be thai (1) 4M (1) 6h (2) 1/6 h (2) 2M (3) h 91. (4) Zero 83 On dipping a capillary of radius 'r' in water, water rises upto a height H and potential energy of water is u,. If a capillary of radius 2r is dipped in water, (3) M Shape of meniscus for a liquid of zero angle of (4) suftsce S contact is (1) plane (2) parabolic (3) hemi-spherical 84. Due to capillary action a liquid will rise in a tube if is (4) cylindrical then the potential energy is u,. The ratio angle of contact is (1) 2:1 (2) 1:2 (3) 4:1 (4) 1:1 (1) acute (2) obtuse 92 The m of sa 7 A vessel, whose bottom has round holes with diameter of 0.1 mm, is filled with water. The 85. Two droplets merge with each other and fom a maximum height to which the water can be filled without leakage is :- (3) 90° (4) 180° come large droplet. In this process: the (1) Energy is liberated (S.T. of water = 75 dyne/cm, g = 1000 cm/s") (2) Energy is absorbed 13 (1) 100 cm (2) 75 cm (3) 50 cm (4) 30 cm (3) Neither liberated nor absorbed 93. 78. Ina surface tension experiment with a capillary tube water rises up to 0.1 m. If the same experiment is 86. Two capillary tubes of same diameter are put (4) Some mass is converted into energy whose relative...(q76)

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...a, ß are the roots of the equation (a - 2) x2 – (5 – a) x - 5 = 0. Find 'a' if Ja -B = 2/6 %3D 37 (2) or 3 23 (1) 3 or 37 (3) 0 (4) none of these 23 1/3 1/3

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Three conducting spheres A, B and C as shown below. The radii of the spheres are a, b and c respectively, where c>b>a.B and C are connected by a conducting wire. Then the capacity of the system is :

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Find the set of values of a for which zeroes of the quadratic polynomial (a + a + 1)x² + (a-1)x + a² are located on either side of 3.

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Find the magnitude of total positive charge and total negative charge on a hollow sphere, surface-charge-density of whose surface is given by o = 0O Cos e, where oo is a constant and e is the angle made by radius vector with an axis of the Sphere.

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...250< a < 1 3) a#1 4) a #0 The function x + log is increasing when x belongs to the interval 1+ x |1) (1, 0) 2) (2, ) 3) (3, ∞)

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Which of the following points is /are correct regarding radial probability distribution curves ? (AJ Probability of occurance of 3.s electron near the nucleus is greater. than 3p. (B). Radius of maximum probability increases as principal quantum number increases Radius of maximum probability for 3s > 3p > 3d 29 (C) (D) Probability of finding the electron is zero at the nucleus.

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...1) |-1/2,0]| 3) [0,1] 4) [1/2,1] 2) [-1,-1/2] Equation of the line through the point (1/2, 2) and tangent to the parabola y = +2 and secant V4- is 2), 2x + 2y - 3 = 0 to the curve y = 1) 2x + 2y-5 = 0 3) y-2 = 0 4) 2x-1 = 0

asked Apr 17, 2020 by balaji.thirumalai

1 answer

(chatquestion)...2K メ Voく1k2 t, 12V Find the vo Hog by mesh amalysis. on...(Photo from Sumit Debnath

asked Apr 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...105. The configuration of given tartaric acid is ,COOH Н_2 Н-3 он он соон 1. 2R, 3R 2. 2R, 3S 3. 2S, 3S 4. 2S, 3R 106.

asked Apr 16, 2020 by balaji.thirumalai

1 answer

(chatquestion)...If roots of the quadratic equation x + Nx - 444N = 0 are integers and N is a prime number then number of possible %3D values of N is (A) 1 (B) 2 (C) 3 (D) 0

asked Apr 16, 2020 by balaji.thirumalai

1 answer

(chatquestion)...48. Which of the following overlapping is not present in XeO3 molecule ? (a) sp° + Px (d)• () tib (b) (b) sp° + Py (c) d + Px (d) sp3 XZ

asked Apr 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...48.) Hybond. is O's m xeOg dnohow hybrd. Dendenny of cemrd am and nod othouse CHEMICAL BONDING (Basic) 47 Which of the following overlaps is incorrect (assuming Z-axis is internuclear axis) ? (A) 2py + 2py (C) 3dy +3dy J. (E) 3dy +3dy (a) A, B, C 48. Which of the following overlapping is not present in XeO3 molecule ? (a) sp° + Px → T-Bond formation (B) 2px +2px (D) 2s + 2py → 8-Bond formation P9 (F) 2p, +2pz (c) B, E → o -Bond formation → n-Bond formation → o-Bond formation (d) B, C, D () OMO → T-Bond formation (b) C, F 3 3 (b) sp° + Py (c) d + Px (d) sp° +s ) XZ How many sigma bonds are in a molecule of diethyl ether, C2H;OC,H;? - (d) 16 (a) 14 (b) 12 (c) 8 50. Which combination of orbitals will form n-bond, if internuclear axis is x-axis ? ( bon (a) px + Px 9g.96 + d 18-lees (b) dy + dy (c) d x²-y2 (d) dy + d. ух 51. If d orbital of atom A and p, orbital of atom B form r-bond along a particular mole axis, then which bond will be formed along same molecular axis by combination of (dy orbitals of (A) and (B) atom : (d) Can't be predi ой bаs 2020/4/16 00:32 (IV) Ss (c)8-bond (a) o-bond 52. Which of the following is correct order of o-bond strength ? O 2s-2s (b) T-bond (II) 2s – 2p (III) 2p – 2p

asked Apr 15, 2020 by balaji.thirumalai

0 answers

(chatquestion)...12A + MB1 NEET (08-12-2019) 179. Tw o concave 'mirrors of equal radii of curvature R are fixed ona stand facing opposite directions. The whole system has a mass m and is kept on a frictionless horizontal table (figure). 2R - 2R ונ R3R пъ wo blocks A and B. each of mass m, are placed on the two sides of the stand. At = 0, the separation between A and the mirrors is 2R and also the separation between B and the mirrors is 2 R. The block B moves towards the mirror at a speed V. All collisions which take place are elastic. Taking the original position of the mirrors stand system to be x = 0 and X - axis along AB, find the position of the images of A and B at t = 5R 4R (a) 5R, 3. 3R (b) -3R, 4. 4R (c)-3R, 3 (d) none of these

asked Apr 15, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Pre-Medical: Physics ALLEN 258. A 252. One mole of an ideal monoatomic qas is heated at isc a constant pressure of one atmosphere from 0C to 100°C. Then the change in the internal energy DE-0 is ac (1) 20.80 x 10² J (2)12.48 × 10² J -1X3R(100)- (3) 832 x 102J (4) 6.25 x 102J 253. The specific heat of a gas at constant pressure is...(Is question mei humne Q=nCp∆t kyu nhi liya? Question mei to constant pressure Diya hai na fir Cv kyu liya hai?

asked Apr 15, 2020 by balaji.thirumalai

0 answers

(chatquestion)...The locus of the point (in the xy-plane) where electric field due to a dipole (dipole axis is along x-axis and its equatorial is along y-axis) is perpendicular to its axis is A. Straight line perpendicular to the axis B. Circle C. Parabola D. Straight line having inclination 0=tan-V2 with the axis....(Anyone please help in this question)

asked Apr 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...f(x) and g(x) are two functions which satisfy differential equation d?x d?y dx = 0 where f(0) = g(0) = 2 and f (0) = g'(0) = dy2 dx2 dy 1, then Both f(x) and g(x) Both f(x) and g(x) are monotonic functions are decreasing functions (3) Area bounded by f(x), g(x) and x = In2 is + en4) sq. units. (4) Area bounded by f(x), g(x) and x = In2 is - en4) sq. units. Correct Answer :2,4

asked Apr 15, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Two very long straight parallel wires, parallel to y-axis, carry currents 41 and I, along +y direction and -y direction, respectively. The wires are passes through the x-axis at the points (d, 0,0) and (- d, 0,0) respectively. The graph of magnetic fleld z-component as one moves along the x-axis from x =-d to x = +d, is best given by 9. (A) (B) (C) (D) 9.

asked Apr 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...42. If o is a complex cube root of unity, then value of expression [a- cos 0) (1 – w) + ... + TC (12 – @) (12 – o³)} 370 (a) - 1 (b) 0 (c) 1 (d) V3/2

asked Apr 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...3. Three uniform thin aluminum rods each of length 2 m form an equilateral triangle PQR as shown in the figure. The mid point of the rod PQ is at the origin of the coordinate system. If the temperature of the system of rods increases by 50°C, the increase in y-coordinate of the centre of mass of the system of the rods is ... mm. of (Coefficient aluminium = 12/3 x 10-6 K-1) of volume expansion %3D P. (a) 0.05 (c) 0.1 (b) 0.8 (d) 0.2

asked Apr 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Br Br 6. NaNH/NH3 inert solvent (isomerisation) Zn/A PHCH,I → (X). The end Br Br product (X) is (a) (b) CH,Ph (c) (d) /

asked Apr 14, 2020 by balaji.thirumalai

0 answers

(chatquestion)...O Rao IIT Academy Exhaustive Revision Package Rao IIT A An elementary current loop is placed in a non-uniform magnetic field as shown below. In colum R different orientation of loop is described and in column II, the corresponding force experienced the loop. Charg 30° as 74. the as 78. Elec diffe Column II Column I field (A) In the shown situation (p) Resultant force is acting along Pm dive (B) If loop is rotated such that p is (q) Resultant force is acting opposite to pm at a along +ve Z direction. (C) If loop is rotated such that P is RIP (r) F= 0, F, = 0 along-ve Z direction (s) F 0, F,= 0 (D) If loop is rotated such that is along +ve Y direction.

asked Apr 14, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Mass of the moon is (1/81) times mass of the earth of radius R. Distance between the two centres of the earth and the moon is 40 R. The distance of a point on the line joining the two centres in terms of R so that effective value of acceleration due to gravity becomes zero is a) 39 R b) 36 R c) 32 R d) 20 R

asked Apr 14, 2020 by balaji.thirumalai

1 answer

(chatquestion)...2 Equae volume of 0.2 M Ag NO, & 0.1 M Nate 8oe" au mixed h at 25°c94 Kep sp Age = 1-8Y16 M² then cone. of cein ee? will be- a1.3.6X100M bi 3.6 X15? M (9 1:34X155M 1d) 1:34 X155M

asked Apr 14, 2020 by balaji.thirumalai

1 answer

(chatquestion)...mole Comprehension for Q. Nos. 7 to & At 300 K, vapour pressure of pure benzene and toluene are 100 mm and 30 mm of Hg respectively. Also benzene and toluene forms an ideal binary solution. A solution of benzene and toluene is prepared by mixing 3.0 moles of toluene in 2.0 moles of benzene at 300 K. Answer the following questions : 7. If vapours which is in equilibrium with the solution is condensed, mole fraction of benzene in the first drop pure of liquid formed will be 20 (b) 29 18 (d) 29 9. (a) 11 (c) 29 8. If the given solution is distilled by lowering the external pressure at constant 300 K, what will be the m fraction of benzene in the last drop of ligui condensed? (a) 6. (b) (c) 3 (d) O |5116

asked Apr 13, 2020 by balaji.thirumalai

1 answer

(chatquestion)...13 3.

asked Apr 13, 2020 by balaji.thirumalai

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(chatquestion)...Он 3. сОон 3-hydroxy-1-naphthoic acid...(Can this compound be name as 3-hydroxy-1-naphthalenoic acid)

asked Apr 13, 2020 by balaji.thirumalai

0 answers

(chatquestion)...The switch in circuit shifts from 1 to 2 when V > 2V/3 and goes back to 1 from 2 when V, < V/3. The voltmeter reads voltage as plotted. What is the period T of the wave form in terms of R and C? Voltage 2V/3. V/3 time (A) RC (n3 (B) 2RC ln 2 (C) RC (D) RC ln3 ln3 2 3

asked Apr 13, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Lt x²tanse ス4...(Please tell me how to solve this)

asked Apr 13, 2020 by balaji.thirumalai

0 answers

(chatquestion)...2x0-(sinx)"-(tanx) L= lim is a non-zero real number then (A) n 10 (B) n = 12 (C) L= 5. (D) L=-

asked Apr 13, 2020 by balaji.thirumalai

0 answers

(chatquestion)...11:46 PM 23% Dpp (1-3) 12th Physics_Eng_Ans.pdf (D) a boundary between low index of refraction and high index of refraction materials Q.7 Aplane mirror is in a vertical plane and is rotating about a vertical axis at 100 rpm. Ahorizontal beam of light is incident on the mirror. The reflected beam will rotate at: (А) 100 грm (B) 141 rpm (С)0 грm (D) 200 rpm [3] PAGE#1 Q.8 Which of the following statement is true about a plane mirror. (A) Focal length zero, magnification infinity (B) Focal length positive integer, magnification unity (C) Focal length unity, magnification infinity (D) Focal length infinity, magnification unity [3] Q.9 Aray of light is incident on a plane mirror, along the direction given by, A = 2î – 3+4k . Find the unit vector along the reflected ray. Take normal to mirror along the direction of B = 31 – 6j+ 2k -94î + 237j+ 68k (A) 49/29 -94î + 68j- 237k (B) [3] 49/29 3i +бј-2k (C) (D) None of these Q.10 The drawing shows a top view of a square room. One wall is missing and the other three are each mirrors. From point Pin the center of the open side, a laser is fired, with the intent of hitting a small target located at the center of one wall. Identify vector in whose direction the laser can be fired and score a hit, assuming that the laser does not strike any mirror more than once. [4] Target- (B) i+} (C) -i+j (D) -i+ 3

asked Apr 12, 2020 by balaji.thirumalai

0 answers

(chatquestion)...The observed pattern of electrophillic substitution can be explained by (a) the stetric effect of the halogen (c) the electronic effect of the phenolic group (b) the steric effect of the tert-butyl group (d) the electronic effect of the tert-butyl group Conceptual Comprehesion Type Questions Treatment of benzene with CO/HCI in the presence of anhydrous AICI/CUCI followed by reac- tion with Ac,O/NaOAc gives compound X as the major product. Compound X upon reaction with Br,/Na,CO, followed by heating at 473 K with moist KOH furnishes Y as the major prod- uct. Reaction of X with H,/Pd-C, followed by H,PO, treatment gives Z as the major product. Q.23 The Compound Y is : OH Dwivedi Clas stry frem the Root of Br COBr Br COBr (a) Br...(Photo from Sumit Debnath

asked Apr 12, 2020 by balaji.thirumalai

1 answer

(chatquestion)...сооснь, .COOCHS COCI ethyl 2-(chlorocarbonyl)benzoate...(Could anyone explain is this name be ethyl 2-(chloroformyl) benzoate)

asked Apr 12, 2020 by balaji.thirumalai

1 answer

(chatquestion)...M: 2+2リnt oe an then firove that it tger 'a frerfest apare. Here n i a natriral mumbr) a matiural number)

asked Apr 11, 2020 by balaji.thirumalai

1 answer

(chatquestion)...ABCD is va auadrilatiral and che de diagonale AC and BD notersect at 0. If car (AA OB)= s,, (ACOD) = &, and arcoABCD) = s AAvt that Vs, + Vdg s s. Aleo find a which holds true fo deevt inequality gromatrio ndition the (yeometriv condition ran be firpensicular ine, brsitor ite. )

asked Apr 11, 2020 by balaji.thirumalai

1 answer

(chatquestion)...The Electric Potential in a region is represented as V= 3x + 4y - 12z. Then the magnitude of electric field strength at (2m, -3m, 9m) is: A. 13V/m Example B. 9V/m C. 5V/m D. None of these

asked Apr 11, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Is already nmoving downward when it collides with B. 20 m/s and V =-10 + (-10) (3-2)=-20 m/s. Notice that Practice Exercise Water drips from a tap at the rate of 5 drops per second, Determine the vertical separation between two consecutive drops after the lower drop has attained a velocity of 3 m/s?

asked Apr 11, 2020 by balaji.thirumalai

1 answer

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