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(chatquestion)...Or, Resistance of an electric instrument is 200 2 and it can bear a maximum current of 0-1 A. If someone wants to connect it to a D.C. source of 1A current, find the resistance to be connected parallel to it. 2

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...28. Compare C-O bond lengths in the compounds given below : ОН ОН CHO (a) (a) a> b> c (b) (b) b>c> a (c) (c) b>a>c (d) a>c> b

asked Feb 24, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Donds (d) three t bonds 13. ; How many -electrons are present in given molecule? (а) бт (b) 8п (c) 10T (d) 12T 14.

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Et, 0 Br which pruduct d not erpfchel Ao forem) CECH HC=C

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...-OTe NacN t Product -CN CN (16) Both...(Ye kon sa reac h)

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...5. 2/26 13. The ratio of the ehergy of thle electrom in ground evel di- state of hydrogen to the electron in third excited Bohis state of Be3+ is (1) 1:4 (2) 1:2 (3) 1:16 (4) 1:1 14, In an atom two electrons move around the nucleus in circular orbits of radii 4R and 9R. The ratio of te of H- s should the time taken by them to complete one revolution is 37 (1) 1:4 (2) 4:1 (3) 8:27 (4) 27:8 15. The radius of the first Bohr orbit of hydrogen atom is P. The radius of the third orbit of He+ will be espond (1) P. (2) 2P Thns...(14 ques?)

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...mus Ra=2JE YT-R 22-2153RE=2JL 29.=206 0n the fraphyhoo find. Qi to tak chaceaigtor 6j Totai Eurrent thown Inthe gikem tor Cits total resid tan ce î j9E N-gu efhen find the raine of Rad I the R. 2/2...(Please solve this

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...45) In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular paths of radius R using a magnetic field B. If V and B are kept constant, the charge on the ion ratio will be proportional to mass of the ion (a) 1/R? (c) R (b) R? (d) 1/R. (2007)...(Plz Solve this ques also)

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...67 A sample of radioactive element has a mass of 10 g at an instant t = 0. The approximate mass of this element in the sample after two mean lives is (a) 1.35 g (c) 3.70 g (b) 2.50 g (d) 6.30 g (2003) l the radius...(Please solve this)

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...How many nodal plane is/are present in o*2p, 79. antibonding molecular orbital :- (Z= internuclear axis) (1) 0 (2) 1 (3) 2 (4) 3...(Plz explain this question)

asked Feb 24, 2020 by balaji.thirumalai

0 answers

(chatquestion)...2.45 m/s End 1 has a hemis (1) Zero r. End 2 has sub- (2Y20.0 cm shown in figure. Ju (3) 10.6 cm (4) 40. 0 cm (1) Air from end 1 flow in the volume of the 11. A small ball is left in a viscous liquid form very much height. Correct graph of its velocity with time is : (2) Air from end 1 flow bubble (1) A of the soap (3) No change occurs (2) B (4) Air from end 2 flo 3) C of the soap bubbi time velocity...(11)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Or, Resistance of an electric instrument is 200 2 and it can bear a maximum current of 0-1 A. If someone wants to connect it to a D.C. source of 1A current, find the resistance to be connected parallel to it. 2

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...ах 1-2xCosU + У (a+bx)-e*3= x a: xy, = (xy,-y) (y, y

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Ph 8. Mg НСНО → Y; Нуо Ether `Br Product 'Y'is : Ph (a) (b) Ph ОН "CH—ОН Ph, (c) ОН (d) None of these

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...USTWALD Which of the following species can act both as Bronsted acid and base? a. HBr b. NO, C. HCO3 d. HI 1. LASU 2017, Q. 35

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...74 The percentage strength of H,O, solution obtained by mixing equal volumes of two H,O, solutions of "10 volume" and "20 volume" strength is 83. (1) 0.45 2) 4.55 (3) 15 (4) 9...(Solve it plz)

asked Feb 23, 2020 by balaji.thirumalai

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(chatquestion)...y" +y = x² s in2x...(how could solve this question ?)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...bluish tinge Un SKIll, Ilanj un (4) All of the above 108. In an accident, a man dies immediately although 108. their was no injury to brain, kidney, stomach and heart, The probable cause of death may be :- (1) Coagulation (2) Digestion stopped (3) Diaphragm got punctured (4) Larynx got punctured inuous rings in trachea are incomplete 109...(??)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...A far sighted person can see object beyond 71 cm clearly if separation between glasses and eye lens is 2 cm, then find focal length of glass? 30 35 (1) 23 cm (2) 34.5 cm (3) 18.4 cm (4) 30 cm Y If velocity of an electromagnetic wave in a medium...(ye kese solve hoga...)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...23. When mass M, is suspended from the lower end of an uniform string, its equilibrium length is I,. When two mass M, and M, both are suspended from its lower end, its equilibrium length is I,. The natural length of the wire is M24 - M,l2 (2) M, + M2 M1 (4-2)+4 (1) M2 4+/2 (3) (4) Jilz

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...NOTES COOH S03H 503H...(Aisa kuch ayega kya

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...***...(Toh yeh hai kya Autumn

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Cooy MgBL

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...NGC Mg Bz (d mole)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...P= Bx AV Pzp Pzp(AR AR ERROR Concent 2. 3.

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'p', the fractional decrease in radius is :- B (1) Зр Зр (2) 3B (3) (4)

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Mez Cule Product H200...(What is the func of this reagent?)

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A liquid of density p is coming out of a hose pipe of radius a with horizontal speed v and hits a mesh. 50% of the liquid passes through the mesh unaffected. 25% looses all of its momentum and 25% comes back with the same speed. The resultant pressure on the mesh will be (a) pv2 (b) ov (c) (d)...(Solve this...)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...heragoral felas Ph MgB Preodiect ంత HO (9b) Ph (d) Ph

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...**3. Find the area enclosed by the curves y? = 4x and y? = 4(4 – x). (Mar-2011, 2007) %3D %3D

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...%23 The reaistance of 0.2 molere Sousion of electratyfes u the Conductivity of The resistance' of Same electrolyter u hoas Conductivity of the solus" ü 1.4. 0'5 molak selus" of 200 2.find the 0'5 molar solus".

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...60. Which of the following has highest enol content. (1) (2) H. (3) C,H,O CH3 (4) C,H,O- ОСН.

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...energy spent in this process. Tempaer Solution 4 R As volume of water remains constant, so R3 Increase in surface area AA = n (4ar) - 4TR? = 47(n/3 -1) R2 = 4n(100 – 1)10-6 .. Energy spent = TAA = 4n x 99 x 10-6 x 72 x 10-3 = 89.5 x 106 J BEGINNER'S BOX-6 A stick of length 4 cm is floating on the surface of water. If one side of it has surface tension of 80 dyne/cm and on the other side by keeping a piece of camphor the surface tension is reduced to 60 dyne/cm, then find the resultant Torce (in dyne) acting on the stick. (resultant felce ene side) %3D on A thin wire ring of radius 1m is situated on the surface of a liquid. If the excess force required to lift it upwards (before the liquid film breaks) from the liquid surface is 8 N. calculate the surface tension of liquid? A circular frame made of 20 cm long thin wire is floating on the surface of water. The surface tension of water 3. is 70 dyne/cm. Calculate the required excess force to separate this frame from water ? A metallic wire of density d floats horizontally in water. Find out the maximum radius of the wire so that the wite may not sink. (surface tension of water T) A rectangular film of liquid is 5 cm long and 3 cm wide. If the work done in increasing its area to 9 cm x5 cm is 6 x 104 joule, find the surface tension of the liquid ? 5....(1 Ques btado plz)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...3 R2=2JE YT=R ZR2=2,1tSRE=2J2 29.=286 0n she Owthe praphyf ho fined Qi Ro tah Chekdigtor 6i Totai Eurrent :- O Inthe fiken ůr cuits thown Nfhen find the ralhe of Rad I NT-18V 27

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...( -चे (+) उेच पेचे 2.-...(How can i solve this? Can someone please help?)

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Úgzinl) MOTAHEDOON 2-

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...3. If gravitational force between a planet and its satellite is inversely proportional to the distance between them (instead of square of distance between them) then orbital velocity of satellite vo depends on distance as (r is distance between centres of satellite and planet) 16.0km/s m/s (1) Vo (2) Vo c oltshov alns (3) Vo c (4) Vo c 1/2

asked Feb 23, 2020 by balaji.thirumalai

0 answers

(chatquestion)...4.13 smooth A rod of mass M and length L is hung from the massless string as shown and kept stationary on a frictionless horizontal surface. The ratio of tension in the string to the force exerted by horizontal sur- face on the rod is (1) 1 (2) 2 tan 0 (3) cot 0 (4) 2

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...18. Coiling of garden pea tendrils around any support is an example of (a) thigmotaxis (c) thigmotropism (b) ihigmonasty (d) thermotaxis. (2010)

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...15, If lift mvoes upwards with acceleration of 7m/s, then net force on block of mass 5 kg is :- LIFT N2Mg |2kg 0 5kg 10kg (b l) (b 85 N (2) 50 N (3) 70 N (4) 35 N...(How is the answer 4)

asked Feb 23, 2020 by balaji.thirumalai

1 answer

(chatquestion)...from the origin, the distance covered by it in 3 s is (1) 12 m (3) 24 m Two balls are projected simultaneously with the same speed from the top of a tower, one vertically upwards and the other vertically downwards. They reach ground in 9 seconds and 4 seconds respec- tively. Height of the tower is (Take g 10 ms) (1) 100 m 431 180 m A car 'A' crosses a certain point on the road mov- ing with a uniform velocity of 20 m/s att-D0. Af- 7. The ratio of time taken by 6 kg mass to drop th (1) 16:9 (3) 3:4 siuie (21 18 m (4) 36 m 6. A particle moves along x- 4t-2)+3(t-2) where x is in meter an (2) 120 m (4) 200 m (1) initial velocity of 2 acceleration of p (3) particle is at orie (4 All of these 3. An object starts with acceleration. W Sv only the reversed. The ve ter 4 sec. another car 'B' starts from the same point with a uniform acceleration of 2 m/s. Time t after which 'B' overtakes 'A' is approximately. 15 sec. (1) (3) 27 sec. (2) 22 sec. (4) 35 sec. point is-Nv, w (1) 6 A man is 45 8. acceleratin...(2nd and 3rd ques)

asked Feb 22, 2020 by balaji.thirumalai

1 answer

(chatquestion)...7. Among the fol lowing the one which reacts most readily with ethanol is (a) p-nitrobenzyl bromide (b) p-chlorobenzyl bromide (c) p-methoxybenzyl bromide (d) p-methylbenzyl bromide [2004]

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...01. Ifa resistance is measured in terms of a unit 'u' made by combining the electric current, T, Bohr radius 'ao, Planck's constant 'h'and speed of light 'c' then: hc2 (1) Pao h°c (2) Pad h°c³ (3) Paổ hc3 (4) Pao 3....(Pls Solve this ques)

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Naphthalene and benzoic acid can be separated from each other best by the method of (1) Crystallisation (2) Sublimation (3) Distillation (4) Chromatography...(Please help)

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Example 24: Acceleration of particle is a=bt m/s?, 2. where b is a constant. Find the velocity and displace- ment of the particle at t seconds, if initially it was mov- ing with speed of 'u' m/s. 1nt² -ht2 Position

asked Feb 22, 2020 by balaji.thirumalai

1 answer

(chatquestion)...(d) none of these 2. When an atomic gas or vapour is excited at low pressure, by passingan electric current through itthen (a) emission spectrum is observed (b) absorption spectrum is observed (c) band spectrum is observed (d) both (b) and (c)...(Plz answer)

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...In a vessel A 84 litres mixture of milk and water contains in the ratio 5:2. If x litres mixture from vessel A taken out and 12 litres water added into vessel A, then the ratio of milk and water becomes 3:2. Find the value of x.

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...(c) 12 A (d) 14 A 25. A d.c. main supply of e.m.f. 220 V is connected across a storage battery of e.m.f. 200 V through a resistance of 1N. The battery terminals are connected to an external resistance 'R'. The minimum value of 'R', so that a current passes through the battery to charge it is : (a) Zero (b) 11 0 (c) 92 (d) 7 N 373

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...A rod made from a particular alloy is heated from 25℃ to the boiling point of water. Its length increases by 8.47 x10−4m. The rod is then cooled from 25℃ to the freezing point of water. By how much does the rod shrink?

asked Feb 22, 2020 by balaji.thirumalai

0 answers

(chatquestion)...2.A plano-convex lens has a maximum thickness of 6 cm. When placed on a horizontal table with the curved surface in contact with the table surface, then the apparent depth of the bottom most point of the lens is found to be 4 cm. If the lens is inverted such that the plane face of the lens is in contact with the surface of the table, then the apparent depth of the centre of the plane face is found to be 17 cm. The radius of curvature of the lens is (a) 68 cm (c) 128 cm (b) 75 cm (d) 34 cm

asked Feb 22, 2020 by balaji.thirumalai

0 answers

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