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Questions asked by balaji.thirumalai
Questions
4474
questions
1
answer selected
(chatquestion)...There is a uniformly charged non conducting solid sphere made of material of dielectric constantone. If electric potential at infinity be zero, then the potential at its surface is V. If we take electric potential at its surface to be zero, then the potential at the centre will be Ve Vg 32 (2) 3V (1) (3) V (4) Zerggo
other
telegram-2327
asked
Jun 2, 2020
1
answer
(chatquestion)...A parallel plate condenser with plate area A and separation d is filled with two dielectric materials as shown in the given below. The dielectric constants are K1 and K2 respectively. The capacitance will be :- d/2 d/2 1 (K, + K2) E0A (K, +K2 2 K,K2 250A K,K2 3 d K, + K2 250A (K, + K2 K,K2 4 d +
other
telegram-2321
asked
Jun 1, 2020
1
answer
(chatquestion)...The distance of the point having position vector -i+27+ 6k from the straight line passing through the point (2, 3, -4) and parallel to the vector, 6i + 3j - 4k is: (a) 4/3 (b) 7 (c) 2/13 (d) 6
other
telegram-2312
asked
Jun 1, 2020
1
answer
(chatquestion)...! The major product of the following reaction is Br NaBH4 MeОН, 25°C OH OMe OMe (a) (b) OH Br (c) (d)
other
telegram-2307
asked
Jun 1, 2020
1
answer
(chatquestion)...(61 3i +3, i+V3) and Bi+(1-B)} respectively be the Let position vectors of the points A, B and C with respect to the origin O, If the distance of C from the bisector of the acute angle between OA and OB is 3. then the sunm of all possible values of B is (b) 4 (a) 1 (c) 3 (d) 2 (January 2019)
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telegram-2304
asked
Jun 1, 2020
1
answer
(chatquestion)...Silver crystallises in fcc lattice. If edge length of the cell is 4.07 × 10-8 cm and density is 10.5 g cm-3, calculate the atomic mass of silver.
other
telegram-2302
asked
Jun 1, 2020
1
answer
(chatquestion)...Select thes Rtatement. (1) cere wall in preaent in member of fungi and plantal. (2) MUshroonmA belong to Banidiomycutea (3) Preudopodia wrong कपल्प्लमाण ane locomotory and feading in Aporozoans. structure. M) Mitochondria aye the Power houne of the collin all kingdom exupt Monera.
other
telegram-2298
asked
Jun 1, 2020
1
answer
(chatquestion)...Double fertilization is (1) Fusion of two male gametes of a pollen tube with two different eggs (2) Fusion of one male gamete with two polar nuclei (3) Fusion of two male gametes with one egg (4) Syngamy and triple fusion
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telegram-2296
asked
Jun 1, 2020
1
answer
(chatquestion)...Which of the following elements is responsible for maintaining turgor in cells? (1) Magnesium (2) Sodium (3) Potassium (4) Calcium
other
telegram-2292
asked
Jun 1, 2020
1
answer
(chatquestion)...136. Which of the following statements is not true for halogens? (1) All form monobasic oxyacids (2) All are oxidizing agents (3) All but fluorine show positive oxidation states (4) Chlorine has the highest electron-gain enthalpy
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telegram-2290
asked
Jun 1, 2020
1
answer
(chatquestion)...The correct order of atomic radii in group 13 elements is (1) B< Al < In < Ga < TI (2) B< Al < Ga < In < TI (3) B< Ga < Al < TI < In (4) B< Ga < Al < In < TI
other
telegram-2288
asked
Jun 1, 2020
1
answer
(chatquestion)...shutte together to give diethyl ether. A, B and C are in the order The compound A on treatment with Na gives B, and with Pci, gives C. B and C react (1) C,H,OH, C,Hg, C,H,CI (2) C̟H;OH, C,H,CI, C,H,ONa (3) C,H̟CI, C,Hg, C,H,OH (4) C,H,OH, C,H̟ONa, C,H,CI
other
telegram-2286
asked
Jun 1, 2020
1
answer
(chatquestion)...143. Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is (1) CH = CH (2) CH, = CH, (3) CH, – CH, (4) CH,
other
telegram-2279
asked
Jun 1, 2020
1
answer
(chatquestion)...146. Following solutions were prepared by mixing different volumes of NAOH and HCI of different concentrations : M HCI + 40 mL 10 M NaOH 10 a. 60 mL M HCI + 45 mL 10 M NaOH 10 b. 55 mL M HCI + 25 mL 5 M NaOH c. 75 mL M HCI + 100 mL 10 M NaOH 10 d. 100 mL
other
telegram-2276
asked
Jun 1, 2020
1
answer
(chatquestion)...Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity? (1) N,O5 (2) NO2 (3) N,0 (4) NO
other
telegram-2274
asked
Jun 1, 2020
1
answer
(chatquestion)...148. The solubility of BaSO, in water is 2.42 x 10³ gL-1 at 298 K. The value of its solubility product (Kp) will be (Given molar mass of BaSO, = 233 g mol-1) (1) 1.08 × 10-10 mol²L-2 (2) 1.08 × 10-12 mol²L-2 (3) 1.08 × 10-14 mol²L-2 (4) 1.08 × 10-8 mol²L-2
other
telegram-2270
asked
Jun 1, 2020
1
answer
(chatquestion)...Which of the following compounds can form a zwitterion? (1) Aniline (2) Acetanilide (3) Benzoic acid (4) Glycine
other
telegram-2266
asked
Jun 1, 2020
1
answer
(chatquestion)...Which of the following molecules represents the order of hybridisation sp?, sp², sp, sp from left to right atoms?
other
telegram-2263
asked
Jun 1, 2020
1
answer
(chatquestion)...160. Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s² 2s² 2p³, the simplest formula for this compound is (1) Mg,X3 (2) MgX2 (4) Mg,X2 (3) Mg,X
other
telegram-2260
asked
Jun 1, 2020
1
answer
(chatquestion)...Among CaH,, BeH2, BaH2, the order of ionic character is (1) BеН, < CаН, < ВаН, (2) CаН, < BеН, < Ван, (3) BеН, < BаН, < Сан, (4) ВаН, < BеН, < Cан,
other
telegram-2258
asked
Jun 1, 2020
1
answer
(chatquestion)...When initial concentration of the reactant is doubled, the half-life period of a zero order reaction (1) Is halved (3) Is tripled (2) Is doubled (4) Remains unchanged
other
telegram-2256
asked
Jun 1, 2020
1
answer
(chatquestion)...VOLTE VOLTE 85% 1:42 РМ CH, H CH3 C=CH, C=C 3. || H CH2 CH, CH, CH, (а) (b)...(Compare the stability.)
other
telegram-2252
asked
Jun 1, 2020
1
answer
(chatquestion)...An ideal gas is found to obey an additional law given by- P'V=const. The initial pressure, temperature and volume of the gas are P, V and T, respectively. The gas is heated to increase its temperature to 2T. Answer questions 72 and 73. 72.The final volume of the gas is- (1) V (3) 2V (2) V2V (4) 4V
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telegram-2248
asked
Jun 1, 2020
1
answer
(chatquestion)...A bob is hanging over a pulcy nside a Car through a string. The second end ol the string is in the hand of a person standing in the car. The car is moving with constant acceleration 'a directed horizontally as shown. Other end of the string is pulled with constant acceleration 'a' vertically. The tension in the string is (b) m/g² +a² 2+a² -n -та (a) mg+ a' (c) mg? +a² + ma (d) m(g+a)
other
telegram-2246
asked
Jun 1, 2020
1
answer
(chatquestion)...The blockS of masses m and 1 are not attached, The coefficient of static friction between the blocks is u. but the surface beneath / is smooth. What is the maximum magnitude of the horizontal force F required to hold it against M: m M smooth m(M + m)g (a) m(M + m)g (b) HM M(M+ m)g (c) (d) m (M+m)g
other
telegram-2244
asked
Jun 1, 2020
1
answer
(chatquestion)...A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass. Calculate the mass percentage of the resulting solution.
other
telegram-2240
asked
Jun 1, 2020
1
answer
(chatquestion)...Question 2.1: Calculate the mass percentage of benzene (C6H5) and carbon tetrachloride (CCI4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.
other
telegram-2238
asked
Jun 1, 2020
1
answer
(chatquestion)...=>A wire 2.5m leng And vrass-setioh area 10 2. is streched 1.S mm by a fore of 100 N in the elastie Heğion Calculate is the brain i yourg's modulus s the eheng wise- eheryy stored in the
other
telegram-2233
asked
Jun 1, 2020
1
answer
(chatquestion)...183 In circuit (Fig.), there is negligible potential drop between B and E, ir p is 100. Calculate L hase current collector current potential drop across Re Iv. Va ii.
other
telegram-2231
asked
Jun 1, 2020
1
answer
(chatquestion)...A An infinite conducting sheet has surface charge density o. The distance between two equipotential surfaces is r. The potential difference between these two surfaces is or or (2) (1) 260 (4) 2Eo (3) Eor
other
telegram-2228
asked
Jun 1, 2020
1
answer
(chatquestion)...72 79 77 83 90 18 54 62 45 (220 365 250 294 30 56 30 44 61) 72 83 60 10.5 5.5 8.5 10.0
other
telegram-2224
asked
May 31, 2020
0
answers
(chatquestion)...V3x² +1 (ii) f(x) = sin-1 5x2 +1
other
telegram-62424
asked
May 31, 2020
0
answers
(chatquestion)...A toach bulb @. 6 is srated 2.s V 750MA. Calulate i) its powed, i) ile relistance and i) the cnergy Consumed , if this bulo is houds. this lighted for ? faud
other
telegram-2221
asked
May 31, 2020
1
answer
(chatquestion)...Q. Q The charge poisested by an ē i. ind the no. C. that of of will flow Rex seand to cohatitute I ampete. Cu arent
other
telegram-2218
asked
May 31, 2020
1
answer
(chatquestion)...- About 5% of the powes of a 100w light bulo is Cohvexhd to visible adiation what is the aerage intensity Madiation y of visible (0).at. t6j at Assume that the adiation is emitled isatrapically And haylet seflection A distance of Im f om the bulo ? a distanco of lom?
other
telegram-2215
asked
May 31, 2020
1
answer
(chatquestion)...Page Qi a) The refackve indox of glas 1.5. what is the in glons 2(speed Speed of y lin Qy light Načcum 3:0 ms- 5 the Specd heCalaud light in foes indepondent light2 the two and violet toovels lowed glass phism2 Coloud 4 had which hot colauias rdY
other
telegram-2209
asked
May 31, 2020
1
answer
(chatquestion)...Question 7: The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B, = 510 nT. What is the amplitude of the electric field part of the wave? %3D
other
telegram-2208
asked
May 31, 2020
1
answer
(chatquestion)...Three electrolytic cells, A, B, C containing solutions of ZnSOs, AGNO: and CuSO4, respectively are connected in series. A steady current of 1.5 amperes was passed through them until 45 g of silver deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited?
other
telegram-2205
asked
May 31, 2020
1
answer
(chatquestion)...A solution of Ni(NO:); is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?
other
telegram-2203
asked
May 31, 2020
1
answer
(chatquestion)...The reaction, Cr0, +241 → Al,O, + 2Cr (AG -421ks) is thermodynamically feasible as is apparent from the Gibbs energy value. Why does it not take place at room temperature?
other
telegram-2199
asked
May 31, 2020
1
answer
(chatquestion)...In a growing population of a country, (1) pre-reproductive individuals are more than the reproductive individuals. (2) reproductive individuals are less than the post-reproductive individuals. (3) reproductive and pre-reproductive individuals are equal in number. (4) pre-reproductive individuals are less than the reproductive individuals.
other
telegram-2189
asked
May 31, 2020
1
answer
(chatquestion)...Which of the following organisms are known as chief producers in the oceans? (1) Dinoflagellates (2) Diatoms (3) Cyanobacteria (4) Euglenoids
other
telegram-2184
asked
May 31, 2020
1
answer
(chatquestion)...Which of the following is an amino acid derived hormone? (1) Epinephrine (2) Ecdysone (3) Estradiol (4) Estriol
other
telegram-2178
asked
May 31, 2020
1
answer
(chatquestion)...If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct? (1) Raindrops will fall faster (2) Walking on the ground would become more difficult (3) Time period of a simple pendulum on the Earth would decrease (4) 'g' on the Earth will not change
other
telegram-2176
asked
May 31, 2020
1
answer
(chatquestion)...61 from activated 12 How dnes primaty Aludge diffen Sludge? What type of changen. carried out in anaenobic Aludge digenten? Give the Componition g of hiogaa ACwage treatmert plant. in the sludge ane 39 4- 46 86 producid in the 49 44 4子 10 22 12 19 36
other
telegram-2172
asked
May 31, 2020
1
answer
(chatquestion)...Show that the line through the points (4, 7, 8) (2, 3, 4) is parallel to the line through the points (-1, -2, 1). (1, 2, 5).
other
telegram-2169
asked
May 31, 2020
1
answer
(chatquestion)...1 Show that the function f: R. R. defined by (x) = X is one-one and onto, where R. is the set of all non-zero real numbers. Is the result true, if the domain R. is replaced by N with co-domain being same as R.?
other
telegram-2166
asked
May 31, 2020
1
answer
(chatquestion)...Question 6: Let A = (1, 2, 3), B = (4, 5, 6, 7) and let f {(1, 4), (2, 5), (3, 6)} be a function from A to B. Show that f is one - one.
other
telegram-2163
asked
May 31, 2020
1
answer
(chatquestion)...A fost order sreaction has a rate corlstant begên cosith O.10 M concenitolation thed seeactiont e what concentralion of in 0.0051.min'.gf we reactont Dolution after willreman 3hours 9
other
telegram-2157
asked
May 31, 2020
1
answer
(chatquestion)...Qi)D/erentiate blw communcalble d Communicable diseaves2 nor- 4 the hast ) Name the body paat in which following cuents takes phe in Aile cydle plasmodiem ) lextilisation 2evelopoment gametyekyie 2 Release d) Arexual Sporo) to20ites opep roduction
other
telegram-2155
asked
May 31, 2020
1
answer
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