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(chatquestion)...Red P/HI 8, (A) CH,-CH-COOH 'B' looses its optical activity because of (1) Chirality of the molecule destroyed (2) Symmetry of molecule is destroyed (3) Spatial arrangement is changed (4) Racemic mixture is formed

asked Jan 31, 2020 by balaji.thirumalai

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(chatquestion)...-0.02 (10.02)(10)

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...A simple pendulum is constructed from an aluminium sphere attached to a light rod. A second pendulum is constructed of the same length but with a brass sphere. The diameters of the two spheres are the same. The two pendulums are set in motion at the same time with the same amplitude of oscillation. After 10 min the amplitude of oscillation of the aluminium pendulum has decreased to one-half its initial value. By what factor has the amplitude of oscillation of the brass pendulum decreased at this time? (Assume that the damping force acting on a pendulum is directly proportional to the velocity of the sphere. The densities of aluminium and brass are 2.7 × 103 kg m−3 and 8.5 ×103 kg m−3, respectively.)

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...9. Find the equation of the cone which passes through the three coordinate axes as well as the lines 3' 3 -1 1 -2 Ans: (3yz+16zx+15xy = 0)

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...For which elements concentration higher than 10 m mole/Kg of dry matter in plants may result in tonch d t क्p (2 Mn, Zn, Cu (1) Mn, Fe & Mg (3) Mg, Ca, K (4) Ca, Mn & Fe Nitrogen fixer which shows association with a fern as well as gymosperm is :- 3. case (2) Anabaena duo (3) Oscillatonia (1) Nostoc (4) Frankia Genes related to nodule formation are present in :- 4. (2) Legume plant and Rhizobium (1) Legume plant and nostoc (4) Rhizobium only (3) Legume plant only Loss of amino group from alanine forms an organic compound which can be used in respiration & this A Pyruvic acid 5. compound is :- (3) OAA (2) Asparatic acid (1) a-Ketoglutarate 2.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...222. In a cyclic process shown on the P-V diagram, the magnitude of the work done is : P2 V, V2 buseme V, -V, (2) T P,-P (1) T ne (3) P,-P,) (V,- V) (4) it (P,V, – P,V,) TC at 222 TI P.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...11:10 PM 0.00K/s 4G VOLTE 65% DPS 132 - Transport in Plants Q 29. e Ask a Doubt Plant cells submerged in distilled water will become? आसुत जल में डूबी हुई पादप कोशिकाएँ बनेंगी? A. Turgid B. Flaccid C. Plasmolysed D. Impermeable INCORRECT. The correct answer is a When a cell is placed in disttiled water, ( Previous Next >

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...(i) How to obtain phenol from sodium benzene sulphonate ? Give equation in 2 steps. (ii) How can we obtain the following compounds from phenol : (a) 2, 4, 6 tribromo phenol, (b) Phenylacetate, (c) Benzene, (d) p-hydroxybenene. 2 + 2 = 4

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...x10-3 V21 32. A horizontal fire hose with a nozzle of cross-sectional area m2 delivers a cubic metre of water in 10s. What will be the maximum possible increase in the temperature of water while it hits a rigid wall (neglecting the effect of gravity)? (A) 1°C Ans : (A) (B) 0.1°C (C) 10°C (D) 0.01°C

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Date 〒のてP SPF 12ME Fnd Eguluniten t Capasituse

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...A circle with centre (2,3,0) and radius unity has been drawn in the plane z=0 . Find the equation of the sphere through this circle and the point (1, 1 ,1)

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...261 ATTA- KAY PIHYSICS Question 2 A lifting machine has a velocity ratio of 4 and can lift a load of 100kg when the effort applied is 327N. II acceleration due to gravity is 10ms, find the (a) efficiency (b) effort required to overcome friction. (c) work done against friction when the load is lifted through a distance of 2m.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...If sin 4x + cos³x 10. 2 sin4x cos'x, then (A) x = 2. (B) x = (2n + (C) c (2n + 1)n (D) none of these

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Q.II Evaluate the following limits : 1. и lim и->1 и 9х lim +3x-3 x - 27 x'-4x2 +4x x²-1 3/ lim X+2 1(r+Ar)+1-(x²- 2x+ 12 2.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...In mature dicot stem which has undergone secondary growth, youngest layer of secondary xylem is situated :- (1) In between pith and primary xylem (2) Just outside the vascular cambium (3) Just inner to the vascular cambium (4) Just inner to the phellogen

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...na circuit shown in figure reading of ammeter will. S, Sz win (1) increase if S, is closed (2) decrease if S, is closed (3) decrease if S, is closed (4) There is no change whether either S, or S, or both of them closed. llo of emf E, and E, (E, >E,) are connected

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Your are given several 1 kQ resistors. How do your connect 5. (a) the resistors to a circuit that requires a 500 Q resistance? Show your suggestion.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...2s 33. Two identical blocks of ice move in opposite directions with equal speed and collide with each other. What will be the minimum speed required to make both the blocks melt completely, if the initial temperatures of the blocks were-8°C each? (Specific heat of ice is 2100 Jkg K-1 and Latent heat of fusion of ice is 3.36 x 10$ Jkg-) (D) 84 ms-1 (B) 420 ms (A) 840 ms-1 (C) 8.4 ms-1 Ans : (A)

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...For the graph of y = 3x* +16x'+24x? -6 11 a.determine the intervals on which the graph is concave upwards and concave downwards. (-2-) -2,- ,0,downwards Answer: Upwards (-0,-2) 2 14 b.find the points of inflexion. 3 27 (0,-6) local min point c.determine the extremum point and its nature. Hence sketch the graph of y = 3x +16x'+24x-6

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...57 Vectors a, b and é are such that à +6+ c = 0 and|al = 3,16|= 5 and %3D |c| = 7. Find the angle between a and b. %3D

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...lim Lx-3 x'-27 I-3 x' -4x +4x 3/ lim x² -1 X-2 (x+Ax)° –2(x+Ax)+1-(x²-2x+1) lim Ar 0 4. Ax x²+xVZ-4 lim 2 x2 - 3x/2 +4 1 r-7x+6

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Date h৪s 120cm/see 2005 6oom PA aacillation 200g mas with 120em/see ablo c&D find the tim peniad al 200g moue e3.41 Sec d 361 2.82Sec b. a.9.42Sec 48MP AI QUAD CAMERA Shot on realme 5 Pro

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...9. Find the charge on capacitor C in the given circuit : 12V 2µF 79 (2) 14 μC ( 1) 12 μC (3) 20 µC (4) 18 µC

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...OBJECTIVE The solution set of the inequation cos? 2x < cos? x is 6. 2n 2nn + 3 2n 2nn + 3 (A) 2nn - 3 (B) 2nt (G) (na- n - n) TC (D) nt- 3 TC - {nx} 3 (С) | пт 3

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Are waves in a guitar string transverse or longitudinal? Longitudinal Waves and Guitar Strings. A sound wave is produced by a vibrating object. As a guitar string vibrates, it sets surrounding air molecules into vibrational motion. ... In solids, sound can exist as either a longitudinal or a transverse wave.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...The time represented by the clock hands of a pendulum clock depends on the number of oscillations performed by pendulum. Every time it reaches to its extreme position the second hand of the clock advances by one second that means second hand moves by two second when one oscillation is completed. (a) How many number of oscillations completed by pendulum of clock in 15 minutes at calibrated temperature 20°C (b) How many number of oscillations are completed by a pendulum of clock in 15 minutes at temperature of 40°C if a = 2 x 10- 5/°C (c) What time is represented by the pendulum clock at 40°C after 15 minutes if the initial time shown by the clock is 12: 00 pm ? (d) If the clock gains two seconds in 15 minutes then find - (i) Number of extra oscillations (ii) New time period (iii) change in temperature.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...An aluminium rod of lenath 1 = 0.5 m is attached to the bottom of an iron rod of length L= 1m as shown in figure. Find the decrease in height per unit change in temperature of Fe the centre of mass of both the rods. Assume that cross-sectional area of both the rods are equal. Given : density of iron 7.86 g/cc, density of aluminium 4.4 g/c, Al = 11 x 10-6 per C and a = 25 x 10 per°C akıminium

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...A one litre glass flask contains some mercury. It is found that at different temperatures the volume of air inside the flask remains the same. What is the volume of mercury in this flask if coefficient of linear expansion of glass is 9x 10/°C while of volume expansion of mercury is 1.8x 104/°C .. (C) 150 cc (D) 200 cc (A) 50 cc (B) 100 cc

asked Jan 30, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Two rods of length L, and L, are made of materials of coefficients of linear expansions and L,a,. The temperature of the rods is increased by AT and correspondingly the respectively such that L,a, change in their respective lengths be AL, and AL, (A) AL, # AL2 (C) Difference in length (L, -L,) is a constant and is independent of rise of temperature (B) AL, = AL, %3D D) Data is insufficient to arrive at a conclusion

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...At what temperature the centigrade (Celsius) and Fahrenheit, readings are the same (A) - 40° (B) + 40° (C) 36.6° (D) - 37°

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...A centigrade and a Fahrenheit thermometer are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°. What is the fall in temperature as registered by the Centigrade thermometer (A) 30° (B) 40° (C) 60° (D) 80°

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...agments (lane 2 to 4) 11.2.2 Cloning Vectors You know that plasmids and bac within bacterial cells independe

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...21. The hydrostatic pressure developed in the cell is called :- (1) Turgor pressure (3) Osmotic pressure (2) Wall pressure (4) Suction pressure When water enters into a cell what happens to its 22. OP, TP and DPD ? (1) OP & TP increase & its DPD increase (2) OP & DPD increase & TP decrease (3) TP & DPD decrease & OP increase (4) OP & DPD decrease & TP increase 23. Under natural conditions the osmotic pressure is :- AI) More than turgor pressure (2) Less than turgor pressure (3) Equal to turgor pressure ĐPP= OP--K (4) Zero 24. What maintains the shape of a cell ? 30 3° 12) Turgor pressure. (3) Suction pressure (1) Osmotic pressure Oimotie pressure 2. (4) Wall-pressure 25. Osmotic potential is numerically equal to :- (1) Turgor pressure (2) Wall pressure (3) Osmotic pressure 0.P. (4) D.P.D. You are given three cells, a root hair, a cell of th 26. inner cortical layer and a cell of the mesophy arrange them in ascending order of DPD:- Cutical .cell < Meso

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...36. An electron and a positron are released from (0,0,0) and (0,0,1.5R) respectively, in a uniform magnetic field B= B,i, each with an equal momentum of magnitude p= eBR. Under what conditions on the direction of momentum will the orbits be non-intersecting circles?

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Alc.KOH SOCI, ОН 78. Alc.KOH SOCI, Pyridine "Me Major product © and O will be respectively: (1) Me Me (2) Me Me (3) "IMe Me (4) Me Mc

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...C3 = 4 µF C, = 2 µF 12 V C, = 4 µF C2 = 2 µF C, = 4 µF

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...ecreases free energy of solvent molecules (2) Always increases free energy of solvent molecules (3) Always increases free energy of solute molecules (4) May increase or decreases the free energy of solvent molecules 3. For equal concentration, the value of solute potential (Y) of an electrolte sohutionis- (1) Same as a non electrolyte solution (-op) (2) More than a non electrolyte solution (3) Less than a non electrolyte solution (4) More or less than a non electrolyte solution 4 DPD (3) WD Water demand of a cell is represented by :- 4. (2) TP (1) OP unpading

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...solation Membrane water A thistle funnel is filled wvith sucrose solution and kent inyerted in a beaker containin A demonstration of osmosis. (a) Water will diffuse across the membrane (as shown by arrows) to raise the level of the solution in the funnel (b) Pressure can be applied (as showvn) to stop the water movement into tie OSMOTIC PRESSURE yO.P. of solution is equal to that external pressure, which required to be appied on solution in order to prevent osmosis or entry of water in it when the hypotonic ana solutions are separated by a semipermeable membrane." he osmOtic pressure of pure water is zero. O.P. is due to presence of solute into the so The osmotic pressure of a solution is directly proportional to the concentration of sSolute t. Sequence of OP Hydrophytes < Mesophytes <Xerophytes < Halophytes. %3D The highest osmotic pressure is fõund in the halophyte group. Atriplex confertifolna Osmotic pressure of a solution is measured by osmometer.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...(d) None of these C6H5 CH3- (9) pu -н alcoholic KOH 149 Br E2 H- CGH5 СЭНS CH3, CH3. CH5 I| (a) СH, н CGH; CH5 Н

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...(d) None of these C6H5 CH3- (9) pu -н alcoholic KOH 149 Br E2 H- CGH5 СЭНS CH3, CH3. CH5 I| (a) СH, н CGH; CH5 Н

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...DA circle passns thooughthe points G4) and touches the y-arls at the point'aa (7-h)*+y-k) = o? Find its 'eguation.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...Find the derivative of tan- 8. + ar

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...CHO 2zn)Bengene pr nmme 2) H30 Dzn/etur|84 + CH,-Ĉ -08 )4,SO4. CH,-cOOrt coo CH.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...mt>F Joyh Facta always Such thattis taryential to suface of hiu the Find by terce F Ve?+chz (gradenly) a) mgl Mod A ) ungl tngh d) imgh theyl मल

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...The decay rate for a radioactive element falls from 4 x 106 26. second to per 1 x 10° per second in 20 hours. Find (i) the half life and (ii) the decay rate of the radioactive element after 100 hours.

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...1. The number of positive integral solution of the equation x, x, X3 X4 X5 =1050 is (A) 1800 (C) 1400 (B) 1600 (D) none of these

asked Jan 30, 2020 by balaji.thirumalai

1 answer

(chatquestion)...(a) 25% (0) 50% (C) 75% (d) 100% In fruit flies, long wing is dominant to vestigial wing. When heterozygous long-winged flies were crossed with vestigial winged flies, 192 offspring were produced. Of these 101 had long wings and 91 had vestigial wings. If an exact Mendelian ratio had been obtained, then the number of each phenotype would have been Ww. vestigial-winged long-winged w39 128 64 96 96 (b) 64 128 (c) 101 192 (d)

asked Jan 30, 2020 by balaji.thirumalai

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(chatquestion)...9.59K/s Z t l 4G VOLTE 1:37 AM 75% DPS 160 - Human Health and Disease Q 3. Ask a Doubt Better health contributes to GDP growth because of? बेहतर स्वास्थ्य जीडीपी विकास में योगदान देता है। क्यूंकि? A. Health expenditure reduced B. Longevity of people increased Peoples are more efficient & C. low absenteeism D. Good relationships ( Previous Next >

asked Jan 29, 2020 by balaji.thirumalai

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(chatquestion)...186. The rate law of the reaction, RCI + NAOH(aq.) → ROH + NaCl is given by, rate = K1 [RCI]. The rate of the reaction will be : (1) Doubled on doubling the concentration of sodium hydroxide. (2) Halved on reducing the concentration of alkyl halide to half. 3)Decreased on increasing the temperature of the reaction. (4)Unaffected by increasing the temperature of the reaction.

asked Jan 29, 2020 by balaji.thirumalai

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(chatquestion)...EXAMPLE 9.10 (tan x)" and the 1 Let A, be the area bounded by the curve y Prove that for n> 2, A,+ A-2 4. lines y 0, and x and deduce that <A,< 2n +2 2n-2

asked Jan 29, 2020 by balaji.thirumalai

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