Recent questions tagged neet

Using anhydrous $AlCl_3$ as catalyst, which one of the following reactions produces ethylbenzene (PhEt) :-

asked Jul 24, 2018 by pady_1

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The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid (HIn) and base (In–) forms of the indicator by the expression -

asked Jul 24, 2018 by pady_1

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Which of the following coordination compounds would exhibit optical isomerism

asked Jul 24, 2018 by pady_1

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Among the following series of transition metal ions, the one where all metal ions have $3d^{2}$electronic configuration is :-

asked Jul 24, 2018 by pady_1

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Among $[Ni(CO)_4]$$[Ni(CN)_4]^{2-}$,$[NiCl_4]^{2-}$,species, the hybridization states at the Ni atom are, respectively :- (At. No. of Ni = 28)

asked Jul 24, 2018 by pady_1

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The enzyme which hydrolysis triglycerides to fatty acids and glycerol is called :-

asked Jul 24, 2018 by pady_1

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The radioactive isotope $^{60}_{27}Co$which is used in the treatment of cancer can be made by (n, p) reaction. For this reaction the target nucleus is :-

asked Jul 24, 2018 by pady_1

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A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face-centers. The formula of the compound is :-

asked Jul 24, 2018 by pady_1

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The maximum number of molecules is present in:-

asked Jul 24, 2018 by pady_1

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Which is the best description of the behavior of bromine in the reaction given below:-$H_2O+Br_2\to HOBr+HBr$

asked Jul 24, 2018 by pady_1

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In a regular octahedral molecule, $MX_6$ the number of X–M–X bonds at 180º is :-

asked Jul 24, 2018 by pady_1

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Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be :-

asked Jul 24, 2018 by pady_1

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$H_2O$ is dipolar, whereas $BeF_2$ is not. It is because:-

asked Jul 24, 2018 by pady_1

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Which of the following is least reactive in a nucleophilic substitution reaction :-

asked Jul 24, 2018 by pady_1

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Number of chiral carbons in $ \beta–D–(+)– $ glucose is: -

asked Jul 24, 2018 by pady_1

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Camphor is often used in molecular mass determination because :-

asked Jul 24, 2018 by pady_1

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The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in a hydrogen atom will be (Given ionization energy of $H = 2.18\times 10^{-18} J atom^{-1}$ and $h=6.625\times 10^{-34} Js$):

asked Jul 24, 2018 by pady_1

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In an octahedral structure, the pair of d orbitals involved involved in $d^2sp^3$ hybridization is :-

asked Jul 24, 2018 by pady_1

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Which one of the following can be oxidised to the corresponding carbonyl compound :-

asked Jul 24, 2018 by pady_1

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A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid :-

asked Jul 24, 2018 by pady_1

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The correct statement in respect of protein haemoglobin is that it :-

asked Jul 24, 2018 by pady_1

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Which one of the following is a chain growth polymer :-

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Which of the following does not have a metal- carbon bond :-

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Lanthanides are :-

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Which of the following forms cationic micelles above certain concentration :-

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A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness e and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be :-

asked Jul 24, 2018 by pady_1

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The Bohr model of atoms :-

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In a p–n junction photo cell, the value of the photo electromotive force produced by monochromatic light is proportional to: -

asked Jul 24, 2018 by pady_1

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The coefficient of static friction, µs, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move ? The string and the pulley are assumed to be smooth and massless. ($g = 10 m/s^{2}$)

asked Jul 24, 2018 by pady_1

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If $\mid \overrightarrow{A}\times \overrightarrow{B}\mid=\sqrt{3} \overrightarrow{A}.\overrightarrow{B}$ then the value of $\mid \overrightarrow{A}+ \overrightarrow{B}\mid$ is:

asked Jul 24, 2018 by pady_1

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The phase difference between two waves, <br> $y_{1}=10^{-6} \sin \{100t+(x/50)+0.5\}m$ <br> $y_2=10^{-6} \cos \{100t+(\frac{ x} {50})\}m$ <br> Where X is expressed in metres and t is expressed in seconds, is approximately : -

asked Jul 24, 2018 by pady_1

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A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000 Å, is of the order of-

asked Jul 24, 2018 by pady_1

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$M_P$ denotes the mass of a proton and $M_n$that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons. The mass M(N, Z) of the nucleus is given by (c is velocity of light )

asked Jul 24, 2018 by pady_1

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The half life of radium in about 1600 years. Of 100g of radium existing now, 25g will remain undecayed after :-

asked Jul 24, 2018 by pady_1

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A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in t the ratio of-

asked Jul 24, 2018 by pady_1

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A round disc of moment of inertia $I_2$ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia $I_1$ rotating with an angular velocity $\omega$ about the same axis. The final angular velocity of the combination of discs is :-

asked Jul 24, 2018 by pady_1

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A nucleus represented by the symbol $_{Z}^{A}X$ has :-

asked Jul 24, 2018 by pady_1

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According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is :-

asked Jul 24, 2018 by pady_1

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If in a nuclear fusion process the masses of the fusing nuclei be $m_1$ and $m_2$ and the mass of the resultant nucleus be$ m_3$, then

asked Jul 24, 2018 by pady_1

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A mass of 0.5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface, collides with a nearly weightless spring of force constant k = 50 N/m. The maximum compression of the spring would be :- <br>

asked Jul 24, 2018 by pady_1

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The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10V. The d. c. component of the output voltage is :-

asked Jul 24, 2018 by pady_1

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In semiconductors at a room temperature

asked Jul 24, 2018 by pady_1

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The density of newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, the radius of the planet would be :-

asked Jul 24, 2018 by pady_1

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A car is moving towards a high cliff. The car driver sounds a horn of frequency 'f'. The reflected sound heard by the driver has a frequency 2f. If 'v' be the velocity of sound then the velocity of the car, in the same velocity units, will be -

asked Jul 24, 2018 by pady_1

2 answers

Of the diodes shown in the following diagrams, which one of the diode is reverse biased ? +5V R

asked Jul 24, 2018 by pady_1

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Two springs of spring constants $k_1$ and$ k_2$ are joined in series. The effective spring constant of the combination is given by -

asked Jul 24, 2018 by pady_1

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Which one of the following statements is true for the speed 'v' and the acceleration 'a' of a particle executing simple harmonic motion

asked Jul 24, 2018 by pady_1

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The telomeres of eukaryotic chromosomes consist of short sequences of -

asked Jul 24, 2018 by pady_1

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In which one of the following habitats does the diurnal temperature of soil surface vary most ?

asked Jul 24, 2018 by pady_1

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Which one of the following is living fossil -

asked Jul 24, 2018 by pady_1

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