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(chatquestion)...(c) a is even and b is odd (d) a is odd and b is even 8. From the time the front of train enters a platform, it takes 25 seconds for the back of the train to leave the platform, while travelling at a constant speed of 54 km/h. At the same speed, it takes 14 seconds to pass a man running at 9 km/h in the same direction as the train. What is the length of the train and that of the platform in meters, respectively?

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...3 27. Let S = (x,, y,), S' = (x, y2) Let C = (h, k) quati X'+ bioue x, + x, 2 x, + x, = 2h and Y, + y, = 2k SP S'Q = b°, y, y2 = b and SR S'T = b? X; x, = b? Distance between foci SS = 2ae Aisa kyu hoga V(x - x,)' + (y, - Y.)' = (2ae) (x, - x,) + (y, -y,) = 4a°e² → (x, + x, )' – 4x, x, + (y, + y,) – 4 y,y; = 4a’e 4h? - 4b2 + 4k – 46? = 4(a² – b') dina h + k - 2b? = a² - b² h2 + k' = a? + 6? Locus of centre is x + y? = a² + b? which is a circle. 1 .. Locus lo

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...WB=2g, K, =4.9K kg mol-, WA=25g, AT; =1.62K W3 1000 м, WA AT;=K÷x- 4.9x2x1000 M3 =241.98g mol 1.62x25 2C,Н,СООН (С Н.СООН), if 'x' is degree of association then we would have (1-x) mol of Benzoic acid left undissociated and corresponding x/2 as associated moles of Benzoic acid at equilibrium. Therefore, total number of moles of particles at equilibrium is 1-x+=1- 122 Normal molecular mass Abnormal molecular mass 241.98 122 х =1- 2 241.98 122 241.98 –122 х =1 241.98 241.98 239.96 = 0.992 = 99.2% 241.98 Therefore degree of association of Benzoic acid is Benzene is 99.2 %

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...2rB sHS (1) (2) a? B² (3) (4) AlIMS 2015 17. In damped oscillation mass is 1 kg and ws spring constant 100 N/m, damping coefficient = 0.5 kg s-1. If the mass is displaced by 10 cm from its mean position than what will be the value of its mechanical energy after 4 seconds ? S) (2) 0.067 J (3) 6.7 J (1) 0.67 J (4) 0.5 J NEET-II 2016 A body of mass m is attached to the lower end of 18. 813

asked Feb 1, 2020 by balaji.thirumalai

1 answer

(chatquestion)...62. Major product (P) of the given reaction is CH, CH, H,SÓ, >P (Major) CH,O - ОН ОН

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...१०० Page Date Sin3wt. Sindut sinwt 1-costwt) sinut Costo= Co820 QLO0-1 co80+1 2. 1-as0t7sinet Periudre

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...A stationary source of sound emits sound of frequency fo. A screen mounted on a vehicle moves 3. with velocity vo towards the source. An observer detects beat frequency f1. If the vehicle moves away from the source with same speed Vo, observe beat frequency f2. Assuming the observer remains stationary between the source and vehicle all the time, if the ratio of beat frequencies 2, find the velocity vo. [Assume the speed of sound in the air to be c.]

asked Feb 1, 2020 by balaji.thirumalai

1 answer

(chatquestion)...BEGINNER'S BOX-1 Which of the following functions of time represent (a) SHM and (b) Periodic but not SHM (c) Non-et 1. Ex. motion? (ii) sin ot + cos 2 ot + sin 4 ot (i) cin ot + Cos ot (iii) e-ot (iv) log (ot) (v) sin ot - cos ot (VI) sin3 ot

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...a spring of negligible mass is T. If along with it from ous 9. ting another mass M is also suspended, the period of oscillation will now be :- T. (3) as (2) T (4) 2T V2 es AIPMT (Pre) 2011 10. Out of the following functions representing motion of a particle which represents SHM : Cos ot (B) y = sin3ot Зл 3ot 4 (C) y = 5 cos 13. Wh (D) y = 1 + ot + m2t2 %3D У1 the (1) Only (A) (2) Only (D) does not represent SHM (1) (3) Only (A) and (C) (2) (4) Only (A) and (B) (3) AIPMT (Mains) 2011 (4) Two particles are oscillating along two close paralle 11. 14. straight lines side by side, with the same frequency and amplitudes. They pass each other, moving Its in opposite directions when their displacement is half Po: is of the amplitude ase differ (2) 0 (1) (1) (4)

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...Ques: which followrng statemeut is Coveit? The Elechic Puld at a peint is.. ) always Coutimuous b) Cetinuous if there acharge at that hoint c) discontinuow chauge at tat poud el) discoutinuour if therevi at that unchageat there is a negatire achaye peint,

asked Feb 1, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Which of the following reaction has zero activation energy Q.4 (B) CI, → 2 CI (A) CH. + CI →CH; + HCI (C) CH, + CH; →CH, + CH, (D) CH, + CI – CI –→ CH, + Cl + CI

asked Feb 1, 2020 by balaji.thirumalai

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(chatquestion)...Determine the percentage of kinetic energy lost by a small ball when it makes an elastic head-on collision with stationary bigger ball. The mass of the bigger ball is 12 times bigger than the mass of the small ball.

asked Feb 1, 2020 by balaji.thirumalai

1 answer

(chatquestion)...THE PARAGON ACADEMY HYO Page 1 Gerral Ability Q#6 CSS-2018 (A) Sol:- Direct Relation Paint Area Coveved 24 » 50.4 3x 50.4 スxス4 = = 3x 50.4 ス48 50.4 = 6.3 litses %3D %3D 6.3-3 x l00 % % incuase 3.3 x100 % % 11 x 100 % Increase 110 %

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...50. When phenyl magnesium bromide reacts with t-butanol the product would be (b) Phenol (a) Benzene (d) t-butyl phenyl ether (c) t-butyl benzene Which of the following compounds is not suitable solvent for Grignard reagent ? 51. (d) o (0)

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...3 cm There is a rectangular frame on which two semicircular rings each having massm are connected such that its ends can slip on the sides of the frame. Initially both the rings are connected by a unstretched spring of natural length lo and of spring constant k are touching each other to form a circle. There is thin film (surface tension T) between the semi circular rings and frame as shown in figure. (a) Find the elongation of spring in the equilibrium position of rings. (b) Find the period of the subsequent SHM. [Assume that spring is passing though centre of the circle and whole system is placed on a smooth horizontal plane.] heeee

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...x4 25. 'tan- dx X tan 1 + x2

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...QUSO tvito the physical. Signilicance of BJT and their opplrcaion,

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...a violet color has 98 percent intensity and blue light has 9 percent what is the intensity of other color?

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...Suppose 5 men out of 100 and 25 women out of 10,000 are colour blind Acolour blind person is choson at random What is the probability of his being a male?(Assume oqual diribution of males and females in the population).

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...The number of ways of putting 5 distinct rings on 4 fingers of the left hand. (Ignore the difference in the size of rings and the fingers) be m, then

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...NADH, NAD Ethanol + CO, Path Bis used in :- Bakery (3) Diary industry (2Leather industry Tobacco industry (1) (3) 140. THSC How many redox equivalents are released during 140, glycolysis from 1 molecule of fructose-6-PO समतुल (1) 1 141. argeia है? Where does complete oxidation of pyruvate 141. OCcurs in aerobic respiration ?

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...(3) Vo.s (4) O (3) The angles which a vector i+}+ Z 2. Y and Z with makes X, respectively are 60°, 60°, 60° (3) 60°, 60°, 45° axes 9. Fol par (2) 45°, 45°, 45° (4) 45°, 45°, 60° The value of a unit vector in the or 3. direction of vector A= 5i-12j, is th R5-12 (1) ? (3) (+/13 Which of the following is independent of the choice of co-ordinate system (2) (1 (3 (4) (si-12)/13 10. TE re (1) P+Q+R be (2) (P,+Q, +R,i (3) Pi+0j+Rk (4) None of these A car travels 6 km towards north at an 5. angle of 45° to the east and then travels distance of 4 km towards north at an angle of 135° to the east. How far is the point from the starting point. What angle does the straight line joining its initial and final position makes with the east to 11. CI cl (1) 50 km and tan (5) (2) 10 km and tan (5) (3) 52 km and tan (5) (4) 52 km and tan (5) Given that A+B+C= 0 out of three vectors two are equal in magnitude and the magnitude of third vector is 2 times that of either of the two having equal magnitude. Then the angles between vectors are given by 12. 6. (1) 30°, 60°, 90° (3) 45°, 60°, 90° (4) 90°, 135°, 135° Two forces F =1N and F =2N act along the lines x = O'and y = 0 respectively. Then the resultant of forces would be (2) 45°, 45°, 90° 7. 13. (2) i+ (1) i+2) (4) 2i +j (3) 31+2) At what angle must the two forces (x+ y) and (x - y) act so that the resultant 8. 3=2 may be Va +y?)

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...2. The angles which a vector i+j+J2k makes with X, respectively are (1) 60°, 60°, 60° Y and axes (2) 45°, 45°, 45° (3) 60°, 60°, 45° (4) 45°, 45°, 60°

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A luminous object is placed 20 cm from the surface of a convex mirror and a plane mirror is set so that the virtual images formed in the two mirrors coincide. If the plane mirror is at a distance of 15 cm from the object, then the focal length of the convex mirror, is- (2) 15 cm (1) 10 cm (4) 40 cm (3) 20 cm

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...ex dx (b)

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...(1) Work done is zero adia 12) Internal energy is increased the (3) Heat is supplied to it (1) (4) No change in pressure 254. Air is filled in a tube of the wheel of a car at 27°C (2 and 2 atm pressure if the tube suddenly bursts, the final temperature of air will be :- (y = 1.5, 2/3 = 1.251) (3 (1) – 33° C (2) 0°C (a (3) 21.6° C (4) 240° C 255. Specific heat of a gas undergoing adiabatic change 260. A is : A1) Zero (2) Infinite (3) Positive (4) Negative

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...Maximum deviation from ideal gas is expected from (2) H,O) (4) CH4(8) (), HA NHP) 3(g) (3) N2(8)

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Read the two statements carefully to mark the correct option out of the options given below: Statement - 1 is produced when a transformer steps up the voltage. The power Statement - 2 In an ideal transformer VI= constant. If both the statements are true and the statement - 2 is the correct explanation of statement -1. (a) If both the statements are true but statement -2 is not the correct explanation of the statement - 1. (b) If statement-1 true but statement - 2 is false. (c) If statement -1 is false but statement -2 is true. (d)

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is (a) 0 (b) 210 (c) TC (d) /o

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Read the two statements carefully to mark the correct option out of the options given below: Statement - 1 is produced when a transformer steps up the voltage. The power Statement - 2 In an ideal transformer VI= constant. If both the statements are true and the statement - 2 is the correct explanation of statement -1. (a) If both the statements are true but statement -2 is not the correct explanation of the statement - 1. (b) If statement-1 true but statement - 2 is false. (c) If statement -1 is false but statement -2 is true. (d)

asked Jan 31, 2020 by balaji.thirumalai

0 answers

(chatquestion)...The voltage of an ac supply varies with time (f) as V= 120 sin 100 Rt cos 100 rư. The maximum voltage and frequency respectively are 120 (b) 2 volts, 100 Hz 120 volts, 100 Hz (a) (d) 60 volts, 100 Hz (c) 60 volts, 200 Hz

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...11. The chemical reaction given below: 2CI (aq.) + 3H"(aq.) + HSO (aq.) C2(g) + SO2(g) + 2H,0(1) proceeds readily in aqueous acid solution. (i) Give the half-cell reactions. (ii) If a fully charged cell initially held 1 mole of Cl,, for how many days could it sustain a current of 0.05 ampere, assuming the cell becomes non-operative when 90% of initial Cl, has been used up? [Ans. 40.2 days]

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is (a) 0 (b) 210 (c) TC (d) /o

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...In the electrolysis of an aqueous cupric bromide solution, how many grams of bromine are formed on passing a current of 1 ampere for 16 minutes and 5 seconds? Write the anode and the cathode half reactions. 0.80 g; cathode reaction Cut + 2e [Ans. Cu; Br, + 2e] anode reaction 2Br A curron

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...respiration & this compound is :- ra Ketoglutarate (3)OAA 173. Over small distance substance move by :- (2Ksparatic acid ATFyruvic acid (1 (3 173. Diffusion 42) Mass flow Cytoplasmic streaming CaT Both (1) and (3) Cyana 174 A prokaryotic autotrophic nitrogen fixing symbiont is found in :- YAlnus 174. r Cycas , (AYPisum 175 Function of companion cells is :- (3) Cicer C0.082 175. OLoading of sucrose into sieve elements by passive transport 2) Providing water to phloem * 73. YProviding energy to sieve elements for active transport 4) Loading of sucrose into sieve elements 176) In 0.2 m solution of a non electrolyté, y will be :- value (YŽero bar x (3)-2.3 bar 2.3 bar X 4)-4.5 bar 177 Water molecules are unable to penetrate the endodermis as it is impermeable to water because of a casparian strip which is made up of :- arcellose AS Lignin Suberin (3 Chitin * 16 4

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...In a certain oscillatory system, the amplitude of motion is 5 m and the time period is 4 s. The time taken by the particle for passing between points which are at distances of 4 m and 2 m from the 6. centre and on the same side of it will be (a) 0.30 s (b) 0.32 s (c) 0.33 s (d) 0.35 s

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...When a cross is made between tall plant with yellow seed (TtYy) and tall plant with green seed (Ttyy), what proportion of phenotype in the off spring could be expected to be tall with green. (1) 50% (2) 25% (3) 75% (4) 37.5%

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...19. A particle is moving along a vertical circle of radius R. At P, what will be the velocity of particle (assume critical condition at C)? (1) VgR 160° (2) 2gR (3) 3gR R gR (4)

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...that the magnitude of their difference is v3. Delhi 2012C 70. If a, b and c are three vectors, such that On cor Tal = 5,| 6|= 12, | c| = 13 and a + 6+ c = 0, then find the value of 34 + %3D %3D -> -> +6. C + C a. Also, a- Delhi 2012 71. Let a = i + 4ĵ + 2k, b = 3î - 2j+ 7k and C = 2i – j+ 4k. Find a vector p, which is Hene 2. We perpendicular to both a and b and at p.c= 18. HOTS; All India 2012, 2010 So, 72. Find a unit vector perpendicular to each giv of the vectors a + b and a-6, where 3. Gi -> a = 3i + 2j+ 2k and b = i + 2j – 2k. %3D

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...n 3*** ("C,) n+4 C,3' Sum of the series S=E- is %3D r+4 CA n+4 C4 r=0 r=0 4. (^Ca) (B) 4" ( 2nC.) (A) 4n+4 3n+4 +2n+4 4n+4 (C) (D) n+4C, n+4 C C,

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...240. An ideal gas at 27°C is compressed adiabatically to 8/27 of its original volume. If y = 5/3, then the rise %3D in temperature is:- (2) 375 K (1) 450 K (3) 675 K (4) 405 K

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Tt tt It tt tt

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...4x8712 Em-iti m(^-Dz m-T n-1237 →->2n /2 2.

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...9. 10 (d) ufe is PTC nontaster and husband is PTC taster. Their son is taster but daughters are nontasters. This is not a *** 4. soked trait. Which pedigree is correct? (b) (c) (a) (d) m the following chart

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field E. Due to the force g É, its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively 1. [NEET-2018] (2) 1 m/s, 3 m/s (1) 2 m/s, 4 m/s (3) 1.5 m/s, 3 m/s (4) 1 m/s, 3.5 m/s Sell

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...232. The temperature of 5 moles of a gas which was held at constant volume was changed from 100°C to 120°C. The change in internal energy was found to be 80 joules. The total heat capacity of the gas at constant volume will be equal to:- (1) 8 J/K 12) 0.8 J/K (3) 4.0 J/K (4) 0.4 J/K

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...7. Which of the following alcohol is dehydrated most easily? ОН (1) ОН (2) ОН (3) (4) CH,CH,OH

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...Find the area enclosed by, y=x(x-1)x-3)the x-axis for 0<x<3. 5.

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...12 Which of the following reactions does not involve a C-C bond formation (1) Hydrolysis of a Grignard reagent (2) Combination of two alkyl free radicals (3) Corey-House synthesis of alkanes (4) RNa + R-Br → R-R + NaBr ON\02-EXERCISE.P65

asked Jan 31, 2020 by balaji.thirumalai

1 answer

(chatquestion)...CH, CH;-CH MGCI CH,-C-OH CH; 'Q; CH3 What is 'Q' ? (1) isobutane (2) isopropane (3) tert. butyl chloride (4) propane

asked Jan 31, 2020 by balaji.thirumalai

1 answer

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