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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Match the reactions in Column I with appropriate types of steps/reactive intermediate involved in these reactions as given in Column II. |
| Answer» Correct Answer - A : r, s and t B : p and s C : r and s D : q and r | |
| 202. |
Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both the schemes. The product X isA. B. C. D. |
| Answer» Correct Answer - A | |
| 203. |
The correct statement (s) about surface properties is (are)A. Adsorption is accompanied by decrease in enthalpy and decrease in entropy of the systemB. The critical temperatures of ethane and nitrogen are 563 K and 126 K, respectively. The adsorption of ethane will be more than that of nitrogen on same amount of activated charcoal at a given temperatureC. Cloud is an emulsion type of colloid in which liquid is dispersed phase and gas is dispersion mediumD. Brownian motion of colloidal particles does not depend on the size of the particles but depends on viscosity of the solution |
| Answer» Correct Answer - A::B | |
| 204. |
Match the reactions in Column I with nature of the reactions `//` type of the products in Column II. |
| Answer» Correct Answer - A::B::C::D | |
| 205. |
Match the crystal system/unit, cells mentioned in Column-I with their characteristic features mentioned in Column-II. |
| Answer» Correct Answer - A::B::C::D | |
| 206. |
Match the compouns`//ions` Column I with their properties`// reactions` in Column II. |
| Answer» Correct Answer - A::B::C::D | |
| 207. |
Two batteries of different emfs and different internal resistances are connected as shown. The voltage across AB in volts is. . |
| Answer» Correct Answer - 5 | |
| 208. |
Reaction of `Br_(2)` with `Na_(2)CO_(3)` in aqueous solution given sodium bromide and sodium bromate with evolution of `CO_(2)` gas. The number of sodium bromide molecules involved in the balanced chemical equation is |
| Answer» Correct Answer - 5 | |
| 209. |
A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds (J) and (K). Compound (J) upon reaction with KOH gives benzyl alcohol and a compound (L), whereas (K) on reaction with KOH gives only (M). Compound (H) is formed by the reaction of:A. B. C. D. |
| Answer» Correct Answer - B | |
| 210. |
A tertiary alcohol (H) upon acid-catalysed dehydration gives a product (I). Ozonolysis of (I) leads to compounds (J) and (K). Compound (J) upon reaction with KOH gives benzyl alcohol and a compound (L), whereas (K) on reaction with KOH gives only (M). The structures of compounds (J), (K), and (L), respectively, are:A. `PhCOCH_(3), PhCH_(2)COCH_(3)` and `PhCH_(2)COO^(-)K^(+)`B. `PhCHO, PhCH_(2)CHO` and `PhCOO^(-)K^(+)`C. `PhCOCH_(3), PhCH_(2)CHO` and `CH_(3)COO^(-)K^(+)`D. `PhCHO, PhCOCH_(3)` and `PhCOO^(-)K^(+)` |
| Answer» Correct Answer - D | |
| 211. |
In a hexaonal system system of cycstals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are refular hexagons, and three atoms are sandwiched in between them. A space-cilling model of this structure, called hexagonal close-paked is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spherres are then placed overt the first layer so that they toych each other and represent the second layer so that they toych each other and present the second layer. Each one of the three spheres touches three spheres of the bottom layer. Finally, the second layer is convered with a third layer identical to the bottom layer in relative position. Assume the radius of every sphere to be `r`. The empty space in this hcp unit cell isA. `74%`B. `47.6%`C. `32%`D. `26%` |
| Answer» Correct Answer - D | |
| 212. |
In a hexaonal system system of cycstals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are refular hexagons, and three atoms are sandwiched in between them. A space-cilling model of this structure, called hexagonal close-paked is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spherres are then placed overt the first layer so that they toych each other and represent the second layer so that they toych each other and present the second layer. Each one of the three spheres touches three spheres of the bottom layer. Finally, the second layer is convered with a third layer identical to the bottom layer in relative position. Assume the radius of every sphere to be `r`. The number of atom in this hcp unit cell isA. 4B. 6C. 12D. 17 |
| Answer» Correct Answer - B | |
| 213. |
In a hexaonal system system of cycstals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are refular hexagons, and three atoms are sandwiched in between them. A space-cilling model of this structure, called hexagonal close-paked is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spherres are then placed overt the first layer so that they toych each other and represent the second layer so that they toych each other and present the second layer. Each one of the three spheres touches three spheres of the bottom layer. Finally, the second layer is convered with a third layer identical to the bottom layer in relative position. Assume the radius of every sphere to be `r`. The voume of this hcp unit cell isA. `24sqrt(2)r^(3)`B. `16sqrt(2)r^(3)`C. `12sqrt(2)r^(3)`D. `64/(3sqrt(3))r^(3)` |
| Answer» Correct Answer - A | |
| 214. |
The pair of coordination complex exhibiting the same kind of isomerism is .A. `[Cr(NH_(3))_(5)Cl]Cl_(2) and [Cr (NH_(3))_(4)Cl_(2)]Cl`B. `[Co(NH_(3))_(4)Cl_(2)]^(+) and [Pt (NH_(3))_(2)(H_(2)O)Cl]^(+)`C. `[CoBr_(2)Cl_(2)]^(2-) and [PtBr_(2)Cl_(2)]^(2-)`D. `[Pt(NH_(3))_(3)(NO)_(3)]Cl and [Pt(NH_(3))_(3)Cl]Br` |
| Answer» Correct Answer - B::D | |
| 215. |
The mass of nucleus `._(z)X^(A)` is less than the sum of the masses of `(A-Z)` number of neutrons and `Z` number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus. A heavy nucleus of mass `M` can break into two light nuclei of mass `m_(1)` and `m_(2)` only if `(m_(1)+m_(2)) lt M`. Also two light nuclei of massws `m_(3)` and `m_(4)` can undergo complete fusion and form a heavy nucleus of mass `M` 'only if `(m_(3)+m_(4)) gt M`'. The masses of some neutral atoms are given in the table below. `|{:(._(1)^(1)H,1.007825u,._(1)^(2)H,2.014102u,),(._(1)^(3)H,3.016050u,._(2)^(4)H,4.002603u,),(._(3)^(6)Li,6.015123u,._(3)^(7)Li,7.016004u,),(._(30)^(70)Zn,69.925325u,._(34)^(82)Se,81.916709u,),(._(64)^(152)Gd,151.91980u,._(82)^(206)Pb,205.97445u,),(._(83)^(209)Bi,208.980388u,._(84)^(210)Po,209.982876u,):}|` The correct statement isA. The nucleus `""_(3)^(6)Li` can emit an alpha particle.B. The nucleus `""_(84)^(210)Po`can emit a protonC. Deuteron and alpha particle can undergo complete fusion.D. The nuclei `""_(30)^(70)Zn` and `""_(34)^(82)Se` can undergo complete fusion. |
| Answer» Correct Answer - C | |
| 216. |
The mass of nucleus `._(z)X^(A)` is less than the sum of the masses of `(A-Z)` number of neutrons and `Z` number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus. A heavy nucleus of mass `M` can break into two light nuclei of mass `m_(1)` and `m_(2)` only if `(m_(1)+m_(2)) lt M`. Also two light nuclei of massws `m_(3)` and `m_(4)` can undergo complete fusion and form a heavy nucleus of mass `M` 'only if `(m_(3)+m_(4)) gt M`'. The masses of some neutral atoms are given in the table below. `|{:(._(1)^(1)H,1.007825u,._(1)^(2)H,2.014102u,),(._(1)^(3)H,3.016050u,._(2)^(4)H,4.002603u,),(._(3)^(6)Li,6.015123u,._(3)^(7)Li,7.016004u,),(._(30)^(70)Zn,69.925325u,._(34)^(82)Se,81.916709u,),(._(64)^(152)Gd,151.91980u,._(82)^(206)Pb,205.97445u,),(._(83)^(209)Bi,208.980388u,._(84)^(210)Po,209.982876u,):}|` The kinetic energy ( in `KeV`) of the alpha particle, when the nucleus at rest undergo alpha decay, isA. 5319B. 5422C. 5707D. 5818 |
| Answer» Correct Answer - A | |
| 217. |
The value of `n` in the molecular formula `Be_(n)Al_(2) SiO_(18)` is ….. |
| Answer» Correct Answer - C | |
| 218. |
A student of performs a titration with different burettes and finds titre values of `25.2 mL`, `25.25 mL`, and `25.0 mL`. The number of significant figures in the average titre value is ….. |
| Answer» Correct Answer - C | |
| 219. |
The complex showing a spin -magnetic momnet of `2.82 BM` is .A. `Ni(CO)_(4)`B. `[NiCl_(4)]^(2-)`C. `Ni(P Ph_(3))_(4)`D. `[Ni(CN)_(4)]^(2-)` |
| Answer» Correct Answer - B | |
| 220. |
Upon treatment with ammonical `H_(2)s`, the metal ion that precipitates as a sulfide isA. Fe(III)B. Al(III)C. Mg(III)D. Zn(III) |
| Answer» Correct Answer - D | |
| 221. |
A ball of mass `(m) 0.5 kg` is attached to the end of a string having length `(L) 0.5 m`. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is `324 N`. The maximum possible value of angular velocity of ball (in radian//s) is - .A. 9B. 18C. 27D. 36 |
| Answer» Correct Answer - D | |
| 222. |
The wavelength of the first spectral line in the Balmer series of hydrogen atom is `6561 A^(@)` . The wavelength of the second spectral line in the Balmer series of singly - ionized helium atom isA. 1215ÅB. 1640 ÅC. 2430 ÅD. 4687 Å |
| Answer» Correct Answer - A | |
| 223. |
The correct statement(s) about `O_(3)` is/areA. O-O bond lengths are equalB. Thermal decomposition of `O_(3)` is endothermicC. `O_(3)` is diamagnetic in natureD. `O_(3)` has a bent structure. |
| Answer» Correct Answer - A::C::D | |
| 224. |
In the nuclear transmutation `""_(4)""^(9)Be+Xto""_(4)""^(8)Be+Y`, (X,Y) is(are):A. `(gamma,n)`B. `(p,D)`C. `(n,D)`D. `(gamma ,p)` |
| Answer» Correct Answer - A::B | |
| 225. |
Length of string og musical instrument is varied from `L_(o)` to `2L_(o)` in 4 different cases. Wire is made of different materials of mass per unit length `mu,2mu,3mu,4mu` respectively. For first case (string -1) length is `L_(o)`, Tension is `T_(o)` then fundamental frequency is `f_(o),` for second case length of the string is `(3L_(o))/2` (`3^(rd)`Harmonic), for thid case length of the string is `(5L_(o))/4` (`5^(th)` Harmonic) and for the fouth case length of the string is `(7L_(o))/4` (`14^(th)` harmonic). if frequency of all is same then tension in string in terms of `T_(o)` will be: `{:((A),"String-1",(P),T_(0)),((B),"String-2",(Q),(T_(0))/(sqrt(2))),((C),"String-3",(R),(T_(o))/2),((D),"String-4",(S),(T_(o))/16),(,,(T),(3T_(o))/16):}` |
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Answer» Correct Answer - `(A) to P,(B) to R,(C) to T,(D) to S` Case -1 `" " L=L_(o), T=T_(o),f=f_(o)` `f_(1)=1/(2L_(o))sqrt((T_(o))/(mu))` Case-2: `L=(3L_(o))/2` `f_(2)=3/(2xx(3L_(o))/2)sqrt((T_(2))/(2mu))=f_(o)rArr f_(o)=1/(sqrt(2)L_(o))sqrt((T_(2))/(mu))rArr T_(2)=(T_(o))/2` Case-3: `L=(5L_(o))/4` `f_(3)=5/(2xx(5L_(o))/4)sqrt((T_(3))/(3mu))=f_(o) rArr f_(o)=2/(sqrt(3)L_(o))sqrt((T_(3))/(mu))rArr T_(3)=(3T_(o))/16` Case -4 : `L=(7L_(o))/4rArr f_(4)=14/(2xx(7L_(o))/4)sqrt((T_(4))/(4mu))=f_(o)rArr f_(o)=2/(L_(o))sqrt((T_(4))/(mu))rArr T_(4)=(T_(o))/16` |
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| 226. |
Chemical reaction involve interaction of atoms and molecules. A large number of atoms/molecules (approximately `6.022xx10^(23)`)are present in a few grams of any chemical compound varying with their atomic/molrcular mass. To handle such a large numbers conveniently, the mole concept was introduced. This concept has implications in diverse areas such as analytical in diverse areas such as analytical chemistry, biochemistry, electrochemistry and radiochemistry. The following example illustrates a typical case, involving chemical/ electrochemical reaction, which requires a clear understanding of the mole concept. A 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of teh electrodes (atomic mass: Na=23, Hg=200, 1F=96500 coulombs) The total number of moles of chlorine gas evolved isA. 0.5B. `1.0`C. `2.0`D. `3.0` |
| Answer» Correct Answer - B | |
| 227. |
The correct statement about the following disaccharide is: A. Ring (a) is pyranose with `alpha`-glycosidic linkB. Ring (a) is furanose with `alpha`-glycosidic linkC. ring (b)is furanose with `alpha`-glycosidic linkD. ring (b) is pyranose with `beta`-glycosidic link |
| Answer» Correct Answer - A | |
| 228. |
The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and alkyne. The bromoalkane and alkyne, respectively, areA. `BrCH_2CH_(2)CH_(2)CH_(2)CH_3` and `CH_3CH_(2)C-=CH`B. `BrCH_(2)CH_2CH_3` and `CH_(3)CH_(2)CH_(2)C-=CH`C. `BrCH_(2)CH_(2)CH_(2)CH_(2)CH_2CH_(3)` and `CH_(3)C-=CH`D. `BrCH_(2)CH_(2)CH_(2)CH_(3)` and `CH_(3)CH_(2)C-=CH` |
| Answer» Correct Answer - D | |
| 229. |
The ionisation isomer of `[Cr(H_(2)O)_(4) Cl (NO_(2))]Cl`A. `[Cr(H_(2)O)_(4)(O_(2)N)]Cl_(2)`B. `[Cr(H_(2)O)_(4)Cl_(2)](NO_(2))`C. `[Cr(H_(2)O_(4)Cl(ONO)]Cl`D. `[Cr(H_(2)O)_(4)Cl_(2)(NO_(2))].H_(2)O` |
| Answer» Correct Answer - B | |
| 230. |
The correct structure of ethylenediamineteraacetic acid `(EDTA)` is .A. B. C. D. |
| Answer» Correct Answer - C | |
| 231. |
A wooden block performs SHM on a frictionless surface with frequency, `v_(0)`. The block carries a charge `+Q` on its surface. If now a uniform electric field `vec (E)` is switched on as shwon in figure., then the SHM of the block will be A. of the same frequency and with shifted mean poistionB. of the same frequency and with the same mean positionC. of changed frequency and with shifted mean positionD. of changed frequency and with the same mean position. |
| Answer» Correct Answer - A | |
| 232. |
A particle of mass m is attached to one end of a mass-less spring of force constant k, lying on a frictionless horizontal plane. The other end of the spring is fixed. The particle starts moving horizontally from its equilibrium position at time `t=0` with an initial velocity `u_0`. when the speed of the particle is `0.5u_0`, it collides elastically with a rigid wall. After this collisionA. the speed of the particle when it returns to its equilibrium position is `u_(0)`.B. the time at which the particle passes through the equilibrium position for the first time is `t=pisqrt((m)/(k))`.C. the time at which the maximum compression of the spring occurs is `t=(4pi)/(3)sqrt((m)/(k))`.D. the time at which the particle passes through the equilibrium position for the second time is `t=(5pi)/(3)sqrt((m)/(k))` |
| Answer» Correct Answer - A::D | |
| 233. |
Two vehicles, each moving with speed `u` on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity `w`. One of these vehicles blows a whistle of frequency `f_(1)`. An observer in the other vehicle hears the frequency of the whistle to be `f_(2)`. the speed of sound in still air is `V_C`. The correct statement `(s)` is (are)A. If the wind blows from the observer ot the source `f_(2) gt f_(1)`B. If the wind blows from the source to the observe , `f_(2) gt f_(1)`C. If the wind blows from observer to the source `f_(2) lt f_(1)`D. If the wind blows from the soruces to the observer, `f_(2) lt f_(1)` |
| Answer» Correct Answer - A::B | |
| 234. |
A steady current `I` flows along an infinitely long hollow cylindrical conductor of radius `R`. This cylinder is placed coaxially inside an infinite solenoid of radius `2 R`. The solenoid has a `n` turns per unit length and carries a steady current `I`. Consider a point `p` at a distance `r` from the common axis . The correct statement(s) is (are)A. In the region `0 lt r lt R` , the magnetic field in non-zero.B. In the region `R lt r lt 2R` , the magnetic field is along the common axis.C. In the region `R lt r lt 2R` , the magnetic field is tangential to the circle of radius r, centered on the axis.D. In the region `r gt 2R`, the magnetic field is non-zero. |
| Answer» Correct Answer - A::D | |
| 235. |
STATEMENT-1: The stream of water flowing at high speed from a garden hose pipe tends to spread like a fountain when held vertically up, but tends to narrow down when held vertically down. STATEMENT-2: In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant.A. STATEMENT-1 is True STATEMENT -2 is True STATEMENT -2 is True , STATEMENT -2 is a correct explanation for STATEMENT -1B. STATEMENT-1 is True STATEMENT -2 is True STATEMENT -2 is NOT a correct explanation for STATEMENT 1C. STATEMENT 1 is True STATEMENT 2 is FalseD. STATEMENT 1 is False STATEMENT 2 is True |
| Answer» Correct Answer - A | |
| 236. |
A spray gun is shown in the figure where a piston pushes air out of a nozzle. A thin tube of uniform cross section is connected to the nozzle. The other end of the tube is in a small liquid container. As the piston pushes air through the nozzle, the liquid from the container rises into the nozzle and is sprayed out. For the spray gun shown, the radii of the piston and the nozzle are 20mm and 1mm respectively. The upper end of the container is open to the atmosphere. If the piston is pushed at a speed of `5mms^-1`, the air comes out of the nozzle with a speed ofA. `0.1 ms^(-1)`B. `1 ms^(-1)`C. ` 2 ms^(-1)`D. `8 ms^(-1)` |
| Answer» Correct Answer - C | |
| 237. |
Two small particles of equal masses stant moving in opposite direction from a point `A` in a burtizonetal circule orbic their tangention velocity are `V` and `2V` , respectively as shown in the figure between collsions , the particals move with constant speed After making how many elastic collition , other the then that at `A` these two partical will again reach the point `A` ? A. 4B. 3C. 2D. 1 |
| Answer» Correct Answer - C | |
| 238. |
The hyperconjugative stabilities of tert-butyl cation and `2`-butene, respectively, are due toA. `sigmararrp` (empty) and `sigmararrpi^(**)` electron delocalisations.B. `sigmararrsigma^(**) and sigmararrpi` electron delocalisations.C. `sigmararrp` (filled) and `sigmararrpi` electron delocalisations.D. p (filled) `rarr sigma^(**) and sigma rarrpi^(**)` electron delocalisations. |
| Answer» Correct Answer - A | |
| 239. |
For a first order reaction `A rarr P`, the temperature `(T)` dependent rate constant `(k)` was found to follow the equation `log k = -2000(1//T) + 6.0`. The pre-exponential factor `A` and the activation energy `E_(a)`, respective, areA. `1.0xx10^(6)s^(-1) and 9.2 kJ mol^(-1)`B. `6.0s^(-1) and 16.6 kJ mol^(-1)`C. `1.0xx10^(6)s^(-1) and 16.6 kJ mol^(-1)`D. `1.0xx10^(6)s^(-1) and 38.3 kJ mol^(-1)` |
| Answer» Correct Answer - D | |
| 240. |
A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin (Q). Ozonolysis of (Q) leads to a dicarbonyl compound (R ) which undergoes intramolecular aldol reaction to give predominantly (S). `Poverset(1. MeMgBr)underset{:(2.H^(+)","H_(2)O),(3.H_(2)SO_(4)","Delta):}rarr Q underset(2. Zn"," H_(2)O)overset(1. O_(3))rarr R underset(2. Delta)overset(1. OH^(-))rarr S` The structure of the carbonyl compound (P) is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 241. |
A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin (Q). Ozonolysis of (Q) leads to a dicarbonyl compound (R ) which undergors intramolecular aldol reaction to give predominantly (S). `Poverset(1. MeMgBr)underset{:(2.H^(+)","H_(2)O),(3.H_(2)SO_(4)","Delta):}rarr Q underset(2. Zn"," H_(2)O)overset(1. O_(3))rarr R underset(2. Delta)overset(1. OH^(-))rarr S` The structure of product (S) is:A. B. C. D. |
| Answer» Correct Answer - B | |
| 242. |
A carbon1 compoundj P, which gives positive idofrom test, undergoes reacrtion with MeMgBr followed by dehydration to give olefin Q Ozonolysis of Q leads to a dicarbony1 compound R, which undergoes intramolecular aldol reaaction to give predominantly S. `Poverset(1.MeMgBr)underset({:(2.H^(+)","H_(2)o),(3.H_(2)SO_(4)//"heat"):})(to)Qoverset(O_(3)//Zn-H_(2)O)(to)Roverset(oh^(-))underset("heat")(to)S` The structures of products Q and R respectivley, areA. B. C. D. |
| Answer» Correct Answer - A | |
| 243. |
In the following carbocation, `H//CH_3` that is most likely to migrate to the positively charged carbon is : `H_(3)C^(1)-overset(H)overset(2|)underset(OH)underset(|)(C)-overset(3o+)underset(H)underset(|)(C)-overset(H)overset(4|)underset(CH_(3))underset(|)C-overset(5)CH_(3)`A. `CH_(3) at C-4`B. `H at C-4`C. `CH_(3) at C-2`D. `H at C-2` |
| Answer» Correct Answer - D | |
| 244. |
An ideal gas is expanding such that `PT^(2)= `constant. The coefficient of volume expansion of lthe gas is:A. `1/T`B. `2/T`C. `3/T`D. `4/T` |
| Answer» Correct Answer - C | |
| 245. |
A spherically symmetric gravitational system of particles has a mass density` rho={(rho_0,for, r,lt,R),(0,for,r,gt,R):}` where`rho_0` is a constant. A test mass can undergo circular motion under the influence of the gravitational field of particles. Its speed v as a function of distahce `r(0ltrltOO)` form the centre of the system is represented byA. B. C. D. |
| Answer» Correct Answer - C | |
| 246. |
In the given circuit, the AC source has `(omega) = 100 rad//s`. Considering the inductor and capacitor to be ideal, the correct choice(s) is (are) .A. The current through the circuit, I is 0.3 A.B. The current through the circuit, I is `0.3sqrt(2)A`.C. The voltage across `100 Omega` resistor `=10sqrt(2)V`.D. The voltage across `50 Omega` resistor = 10 V. |
| Answer» Correct Answer - A::C | |
| 247. |
A light beam is traveling from Region I to region IV (refer figure). The refractive indices in Region I, II, III, and IV are `n_(0), n_(0)//2,n_(0)//6 and n_(0)//8` , respectively. The angle of incidence `theta` for which the beam just misses entering Region IV is A. `sin^(-1)(3/4)`B. `sin^(-1)(1/8)`C. `sin^(-1)(1/4)`D. `sin^(-1)(1/3)` |
| Answer» Correct Answer - B | |
| 248. |
The hydrogen -like species `Li^(2+)` is in a spherically symmetric state `S_(1)` with one node. Upon absorbing light , the ion undergoes transition to a state `S_(2)`. The state `S_(2)` has one radial node and its energy is equal is to the ground state energy of the hydrogen atom. Energy of the state `S_(1)` in units of the hydrogen atom ground state energy isA. 0.75B. 1.5C. 2.25D. 4.5 |
| Answer» Correct Answer - C | |
| 249. |
The hydrogen -like species `Li^(2+)` is in a spherically symmetric state `S_(1)` with one node. Upon absorbing light , the ion undergoes transition to a state `S_(2)`. The state `S_(2)` has one radial node and its energy is equal is to the ground state energy of the hydrogen atom. The sate `S_(1)` is |
| Answer» Correct Answer - B | |
| 250. |
Two aliphatic aldehydes (P) and (Q) react in the presence of aqueous `K_(2)CO_(3)` to give compound (R ) which upon treatment with HCN gives compound(S). On acidification and heating, (S) gives the product shown below: Compounds (P) and (Q), respectively, are:A. B. C. D. |
| Answer» Correct Answer - B | |