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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.
| 351. |
In radioactive decay process, the negatively changed emitted `beta-`particle areA. the electrons orbiting around the nucleusB. the electrons present inside the nucleusC. the electrons produced as a result of the decay of neutrons inside the nucleusD. the electrons produced as a result of collisions between atoms |
| Answer» Correct Answer - C | |
| 352. |
Application of a forward biase to a `p-n` junction:A. Widens the depletion zoneB. Increases the number of donors on the n sideC. Increases the potential difference across the depletion zoneD. Increases the electric field in the depletion zone |
| Answer» Correct Answer - B | |
| 353. |
In dimension of circal velocity `v_(0)` liquid following through a take are expressed as `(eta^(x) rho^(y) r^(z))` where `eta, rhoand r `are the coefficient of viscosity of liquid density of liquid and radius of the tube respectively then the value of `x,y` and `z` are given byA. 1,1,1B. 1,-1,-1C. `-1,-1,1`D. `-1,-1,-1` |
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Answer» Correct Answer - B `V_(c)=eta^(x)rho^(y)r^(z)` `M^(0)L^(1)T^(-1)=(M^(1)L^(-1)T^(-1))^(x)(M^(1)L^(-3))^(y)(L^(1))^(z)` `M^(0)L^(1)T^(-1)=M^(x+y)L^(-3-3y+z)T^(-x)` `-x=-1` x=1 . . . (1) x+y=0=0 y=-x=-1 . . . (2) `-x-3y+z=1` `-1-3(-1)+z=1` z=-1 |
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| 354. |
Water rises to height `h` in capillary tube. If the length of capillary tube above the surface of water is made less than `h` thenA. water does not rise at all.B. water rises upto the tip of capillary tube and then starts overflowing like a fountain.C. water rises upto the top of capillary tube and stays there without overflowing.D. water rises upto a point a little below the top and stays there |
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Answer» Correct Answer - C Height of water columgtlength of tube `implies`so liquid will be stay there |
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| 355. |
A particle is executing a simple harmonic motion. Its maximum acceleration is `alpha` and maximum velocity is `beta`. Then, its time period of vibration will beA. `(2pibeta)/(alpha)`B. `(beta^(2))/(alpha^(2))`C. `(alpha)/(beta)`D. `(beta^(2))/(alpha)` |
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Answer» Correct Answer - A Maximum acceleration `alpha=Aomega^(2)` . . (1) Maximum velocity `beta=A omega` `(Eq^(n)(1))/(Eq^(n)(2))implies(alpha)/(beta)implies(alpha)/(beta)=(2pi)/(T)` `T=2pi(beta)/(alpha)` |
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| 356. |
Two similar coils of radius `R` are lying concentriclaly with their planes at right angels to each other. The currents flowing in them are `I` and `2I` respectively. The resulant magntic field induction at the centre will beA. `(mu_(0)I)/(2R)`B. `(mu_(0)I)/(R )`C. `(sqrt(5)mu_(0)I)/(2R)`D. `(3mu_(0)I)/(2R)` |
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Answer» Correct Answer - C Magentic field at the centre of circular current carrying coil of radius R and current I is `=(mu_(0)I)/(R )=B` Magnetic field at the centre of circular current carrying coil of radius R and current 2I is `=(mu_(0)2I)/(2R)=2B` The resulting magnetic field will be `=sqrt(B^(2)+4B^(2))=sqrt(5)B` |
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| 357. |
A milli-voltmeter of 25 milli-volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) of necessary shunt will be:A. 1B. 0.05C. 0.001D. 0.01 |
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Answer» Correct Answer - C If the resistance of the meter is G then the full scale deflection current `i_(g)=(25 mV)/(G)` ampere The Value of shunt required for converting it into ammeter of range 25 ampere is `S=(i_(g)G)/(i-i_(g))` So `~~(25 mV)/(25)=0.001 Omega` |
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| 358. |
An electric dipole is placed at an angle of `30^(@)` with an electric field intensity `2xx10^(5)N//C`. It experiences a torque equal to `4Nm`. The charge on the dipole, if the dipole is length is `2 cm`, isA. 8 mCB. 2 mCC. 5 mCD. `7muC` |
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Answer» Correct Answer - B `tau=pEsintheta` `tau=qlEsintheta` `q=(tau)/(lEsintheta)` `q=(4)/(2xx10^(-2)xx2xx10^(5)xx(1)/(2))` `q=2xx10^(-3)C` `q=2mC` |
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| 359. |
A proton carrying `1 MeV` kinetic energy is moving in a circular path of radius `R` in unifrom magentic field. What should be the energy of an `alpha-` particle to describe a circle of the same radius in the same field?A. 1 MeVB. 0.5 MeVC. 4 MeVD. 2 MeV |
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Answer» Correct Answer - A `r=(sqrt(2m(KE)))/(qB)` `q prop sqrt(m(KE))` `(e)/(2e)=sqrt(((m_(p))(1MeV))/((4m_(p))(KE)))` `(1)/(4)=(1)/(4(KE))` `KE=1MeV` |
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| 360. |
Dimension of resistance in an elecatrical circuit, in terms of dimension of mass `M`, of length `L`, of time `T`, and of current `I`, would beA. `ML^(2)T^(-3)I^(-2)`B. `ML^(2)T^(-3)I^(-2)`C. `ML^(2)T^(-2)`D. `ML^(2)T^(-1)I^(-1)` |
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Answer» Correct Answer - A `R=(V)/(I)=(J)/(IC)-=(ML^(2)T^(-2))/(I^(2)T)= ML^(2)T^(-3)I^(-2)` |
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| 361. |
A transformer is used to light a `100 W` and `110 V` lamp from a `220V` mains. If the main current is `0.5 A`, the Efficiency of the transformer is approximately:A. `10%`B. `30%`C. `50%`D. `90%` |
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Answer» Correct Answer - D The efficiency of transformer `eta=(V_(S)I_(S))/(V_(P)I_(P))xx10=(100)/(220xx0.5) xx 100~~90%` |
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| 362. |
Compared to those of humans, erythrocytes of Frog areA. Very much smaller and fewerB. Nucleated and without haemoglobinC. Without nucleous but with haemoglobinD. Nucleated and with haemoglobin |
| Answer» Correct Answer - D | |
| 363. |
A person entering an empty room suddenly fins a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control systemA. Hypothalamus activates the parasympathetic division of brainB. Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal cortexC. Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal medullaD. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse |
| Answer» Correct Answer - C | |
| 364. |
Which one is the most abundant protein in the animal worldA. CollagenB. InsulinC. TrypsinD. Haemoglobin |
| Answer» Correct Answer - A | |
| 365. |
Which part of the human ear plays no role in hearing as such but is otherwise very much required ?A. Vestibular apparatusB. Ear ossiclesC. Eustachian tubeD. Organ of corti |
| Answer» Correct Answer - A | |
| 366. |
Which one of the following correctly describes the homologous structures?A. Organs with anatomical similarities, but performing different functionsB. Organs with anatomical dissimilarities but performing same functionC. Organs that have no function now, but had an important function in ancestorsD. Organs appearing only in embryonic stage and disappearing later in the adult |
| Answer» Correct Answer - A | |
| 367. |
In which era reptiles were dominated ?A. Coenozoic eraB. Mesozoic eraC. Paleozoic eraD. Archaeozoic era |
| Answer» Correct Answer - B | |
| 368. |
Which one of the following statements in regard to the excretion by the human kidneys is correct?A. Descending limb of Loop of Henly is impermeable to waterB. Distal convoluted tubule is incapable in reabsorbing `HCO_(3 )`C. nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubeD. Ascending limb of Loop of Henly is impermeable to electrolytes |
| Answer» Correct Answer - C | |
| 369. |
A terrestrial animal must be able toA. Conserve waterB. By creating botanical gardenC. Excrete large amounts of salts in urineD. Excrete large amounts of water in urine |
| Answer» Correct Answer - A | |
| 370. |
Cell elongation in internodal regions of the green plants takes place due toA. CytokininsB. GibberellinsC. EthyleneD. Indole acetic acid |
| Answer» Correct Answer - B | |
| 371. |
Which of the following secretes toxins during storage condition of crop plantsA. AspergillusB. PenicilliumC. FusariumD. Colletotrichum |
| Answer» Correct Answer - A | |
| 372. |
Which of the following plants produces seeds but not flowers : -A. MaizeB. MintC. PeepalD. Pinus |
| Answer» Correct Answer - D | |
| 373. |
Independent assortment of genes does not take place when:A. Genes are located on homologous chromosomesB. Genes are linked and located on same chromosomeC. Genes are located on non-homologous chromosomeD. All the above |
| Answer» Correct Answer - B | |
| 374. |
The genes controlling the seven pea characters studied by Mendel are now known to located on how many different chromosomes?A. SevenB. SixC. FiveD. Four |
| Answer» Correct Answer - D | |
| 375. |
the linkage map of X -chroosomes of fruitfly has 66 units with yellow body gene (y) at one end and bobbed hair (b) gene at the other end the recomnation frequency between these two genes (y and b) should be :A. `60%`B. `gt 50%`C. `le50%`D. `100%` |
| Answer» Correct Answer - C | |
| 376. |
Endosperm is formed during the double fertilization byA. Two polar nuclei & one male gameteB. One polar nuclei & one male gameteC. Ovun and male gemeteD. Two polar nuclei & two male gamete |
| Answer» Correct Answer - A | |
| 377. |
Which method makes the seed coat permeable and allows growth of embryo ?A. ScarificationB. StratificationC. VernalizationD. All of the above |
| Answer» Correct Answer - A | |
| 378. |
Glycolate induces opening of stomata inA. Presence of oxygenB. Low `CO_2` conc.C. High `CO_2`D. `CO_2` absent |
| Answer» Correct Answer - B | |
| 379. |
Some meta-directing substituents in aromatic substitution are given which one is the most deactivating?A. `-C-=N`B. `-SO_(3)H`C. `-COOH`D. `NO_(2)` |
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Answer» Correct Answer - D `-NO_(2)` is strong deactivating group. |
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| 380. |
Sequence of which of the following is used to know the phylogeny ?A. m-RNAB. r-RNAC. t-RNAD. DNA |
| Answer» Correct Answer - B | |
| 381. |
Tobacco mosaic virus is a tubular filament of sizeA. 300 × 10 nmB. 300 × 5 nmC. 300 × 20 nmD. 700 × 30 nm |
| Answer» Correct Answer - C | |
| 382. |
Cytochrome isA. Metallo flavo proteinB. Fe containing porphyrin pigmentC. GlycoproteinD. Lipid |
| Answer» Correct Answer - B | |
| 383. |
Male XX and female XY develop sometimes due toA. DeletionB. Transfer of segments in X and Y chromosomesC. AneuploidyD. Hormonal imbalance |
| Answer» Correct Answer - B | |
| 384. |
which of the following Is less general in characters as compared to genusA. SpeciesB. DivisionC. ClassD. Family |
| Answer» Correct Answer - A | |
| 385. |
Adhesive pad of fungi penetrate the host with the help of:-A. Mechanical pressure and enzymesB. Hooke and suckersC. Softening by enzymesD. Only by mechanical pressure |
| Answer» Correct Answer - A | |
| 386. |
Microtubules are absent inA. MitochondriaB. FlagellaC. Spindle fibresD. Centriole |
| Answer» Correct Answer - A | |
| 387. |
A sequence of how many nucleotides in messenger RNA makes a condon for an amino acidA. FourB. OneC. TwoD. Three |
| Answer» Correct Answer - D | |
| 388. |
Two spreings A and B`(k_A=2k_B)` ar stretched by applying forces of equa magnitudes at the foru ends. If the energy stored in A is E, that in B isA. 2EB. `E/4`C. `E/2`D. `4E` |
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Answer» Correct Answer - A `E=(kx^2)/2 =(k^2x^2)/(2k) rArr E=f^2/(2k)` `because` Force is equal `therefore E prop 1/k` |
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| 389. |
A stone is thrown at an angle of `45^(@)` to the horizontal with kinetic energy K. The kinetic energy at the highest point isA. `K/sqrt2`B. `K/2`C. 2KD. K |
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Answer» Correct Answer - B `K′ = Kcos^2 45^(@) = K//2` |
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| 390. |
Choose the corrector relation between the transistor parameters `alpha` and `beta`.A. `beta = (1 - alpha)/(alpha)`B. `beta = (alpha)/(1 - alpha)`C. `alpha = (beta - 1)/(beta)`D. `alpha beta = 1` |
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Answer» Correct Answer - B From one side, `(t - x)/(5) = 1.5` From other side, `(x)/(2) = 1.5 to x = 3` `:. (t - 3)/(5) = 1.5 implies t = 7.5 + 3 = 10.05 cm` |
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| 391. |
A mass of diatomic gas`(gamma=1.4)` at a pressure of 2 atomphere is compressed adiabitically so that its temperature rises from `27^(@)C` to `927^(@)C`. The pressure of the gas in the final state isA. 8 atmB. 28 atmC. 68.7 atmD. 256 atm |
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Answer» Correct Answer - D `PpropT^(gamma//gamma-1)` `P_2/P_1=(T_2/T_1)^(gamma//gamma-1)` `P_2=P_1(T_2/T_1)^(gamma//gamma-1)` |
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| 392. |
Which one of the following incorrect about the characteristic of protobionts (coacervates and microspheres) as envisaged in abiogenic origin of life ?A. They were partially isolated from the surru- oundingB. They could maintain an internal environ- mentC. They were able to reproduceD. They could separate combinations of mole- cules from the surroundings |
| Answer» Correct Answer - C | |
| 393. |
Two thin lenses of focal length `f_(1)` and `f_(2)` are in contact and coaxial. The power of the combination isA. `(f_(1)+f_(2))/(2)`B. `(f_(1)+f_(2))/(f_(1)f_(2))`C. `sqrt((f_(1))/(f_(2))`D. `sqrt((f_(2))/(f_(1))` |
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Answer» Correct Answer - B `P=P_(1)+P_(2)=(1)/(f_(1))+(1)/(f_(2))` `F=(f_(1)+f_(2))/(f_(1).f_(2))` |
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| 394. |
Which of the following is not the property of a cathode raysA. It produces heating effectB. It does not deflecte in electric fieldC. It casts shadowD. It produces flurosence |
| Answer» Correct Answer - B | |
| 395. |
What is the cause of "Green house effect"?A. Infra-red raysB. Ultra violet raysC. X-raysD. Radio waves |
| Answer» Correct Answer - A | |
| 396. |
When ultraviolet rays incident on metal plate then photoelectric effect does not occur, it occurs by incidence of : -A. Infrared raysB. X-raysC. Radio waveD. Light wave |
| Answer» Correct Answer - B | |
| 397. |
Antiseptics and disinfectants either kill or prevent growth of microorganism. Identify which of the following statements is not true `:`A. A` 0.2 %` solution of phenol is an antiseptic while `1 %` solution acts as a disinfectantB. Chlorine and Iodine are used as strong disinfectantsC. Dilute solutions of boric acid and hydrogen peroxide are strong antisepticsD. Disinfectants harm the living tissues |
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Answer» Correct Answer - C Chlorine is disinfectants but Iodine is antiseptics. |
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| 398. |
Concentration of the `Ag^(+)` ions in a saturated solution of `Ag_(2)CO_(2)O_(4)` is `2.2xx10^(-4) mol L^(-1)` Solubility product of `Ag_(2)C_(2)O_(4)` is:A. `2.42xx10^(-8)`B. `2.66 xx 10^(-12)`C. `4.5 xx 10^(-11)`D. ` 5.3 xx 10^(-12)` |
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Answer» Correct Answer - D `Ag_(2)C_(2)O_(4)(s) iff 2 underset(2s)(Ag^(+)(aq))+underset(s)(C_(2)O_(4)^(2-)(aq))` `K_(sp)=[Ag^(+)]^(2)[C_(2)O_(4)^(2-)]` `[Ag^(+)]=2.2xx10^(-4)M` `:. [C_(1)O_(2)^(1-)]=(2.2xx10^(-2))/(2)M=1.1xx10^(-2) M` `:. K_(SP)=(2.2 xx 10^(-4))^(2)(1.1xx10^(-4))` `=5.324 xx 10^(-12)` |
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| 399. |
Which of the following acids does not exhibit optical isomerism?A. Lacetic acidB. Tartaric acidC. Maleic acidD. `alpha`-amino acids |
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Answer» Correct Answer - C HO OC-CH=CH-CO OH (Maleic acid) almost show optical isomerism |
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| 400. |
The number of antibonding electron pairs in `O_(2)^(2-)` molecular ion on the basic of molecular orbital theory isA. 4B. 3C. 2D. 1 |
| Answer» Correct Answer - A | |