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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.
| 401. |
A certain liquid has a melting point of `50^(@)C` and a boiling point of `150^(@)C`. A thermometer is designed with this liquid and its melting and boiling points are designated as `0^(@)L` and`100^(@)L`. The melting and boiling points of water on this scale areA. `25^(@)L` and `75^(@)L`, respectivelyB. `0^(@)L` and `100^(@)L`, respectivelyC. `20^(@)L` and `70^(@)L`, respectivelyD. `30^(@)L` and `80^(@)L`, respectively |
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Answer» Correct Answer - A |
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| 402. |
A block of mass M rests on a rough horizontal table. A steadily increasing horizontal force is applied such that the block starts to slide on the table without toppling. The force is contained even after sliding has started. Assume the coefficients of static end kinetic friction between the table and block to be equal. The correct representation of the variation of the frictional force , `f_(1)` exerted by the table on the block with time t is given by -A. B. C. D. |
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Answer» Correct Answer - A |
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| 403. |
An electric field due to a positively charged long straight wire at a distance r from it is proportional to `r_(-1)` in magnitude. Two electrons are orbiting such a long straight wire in circular orbits of radii `1 Å` and `2 Å`. The ratio of their respective time periods isA. `1:1`B. `1:2`C. `2:1`D. `4:1` |
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Answer» Correct Answer - B |
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| 404. |
Match the disease in Column-I with the routes of infection in Column-II. Choose the CORRECT combination : A. P-ii,Q-i,R-v,S-ivB. P-ii,Q-i,R-iii,S-vC. P-i,Q-iii,R-v,S-ivD. P-ii,Q-ii,R-iv,S-v |
| Answer» Correct Answer - A | |
| 405. |
Which ONE of the pairs of amino-acids contains two chiral centres ? (A) Isoleucine and threonine (B) Leucine and valine (C) Valine and isoleucine (D) Threonie and leucine |
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Answer» Correct option (A) Isoleucine and threonine Explanation: The amino acid form two stero isomers that are mirror image of each other. The structure are not supermaposable on each other. |
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| 406. |
In photosynthetic carbon fixation, which ONE of the following reacts with `CO_(2)`?A. PhosphoglycolateB. 3-PhosphoglycerateC. Ribulose-1,5-bisphosphateD. Ribulose-5-phosphate |
| Answer» Correct Answer - C | |
| 407. |
Bacteriochloropgylls are photosynthetic pigments found in phototrophic becteria. Their function is distinct from the plant chlorophylls in that they-A. do not produce oxygenB. do not conduct photosynthesisC. absorb only blue lightD. function without a light source |
| Answer» Correct Answer - A | |
| 408. |
Athletes often experience muscle cramps. Which of the following statements is true muscle cramps ? (A) Muscle cramp is caused due to conversion of pyruvic acid into lactic acid in the cytoplasm (B) Muscle cramp is caused due to conversion of pyruvic acid into lactic acid in the mitochondria (C) Muscle cramp is caused due to nonconversion of glucose to pyruvate in the cytoplasm (D) Muscle cramp is caused due to conversion of pyruvic acid into ethanol in the cytoplasm |
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Answer» Correct Option :- (A) Muscle cramp is caused due to conversion of pyruvic acid into lactic acid in the cytoplasm |
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| 409. |
Seven identical coins are rigidly arranged on a flat table in the pattern shown below so that each coin touches its neighbors. Each coin is a thin disc of mass m and radius r. Note that the moment of inertia of an individual coin about an axis passing through centre and perpendicular to the plane of the coin is `m^(2)//2` The moment of inertia of the system of seven coins about an axis that passes through the point P (the centre of the coin positioned directly to the right of the central coin) and perpendicular to the plane of the coins is–A. `(55)/(2) mr^(2)`B. `(127)/(2) mr^(2)`C. `(111)/(2)mr^(2)`D. `55 mr^(2)` |
| Answer» Correct Answer - C | |
| 410. |
The solubility curve of KNO3 in water is shown below. The amount of KNO3 that dissolves in 50 g of water at 40°C is closest to (A) 100g (B) 150g (C) 200g (D) 50g |
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Answer» Correct option (A) 100g At 40ºC solubility is 200 gm per 100 ml (approx) i.e., 100 ml of water contains = 200 gm of KNO3(approx) 50 ml of water contains = 100 gm (approx) |
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| 411. |
The gas produced from thermal decomposition of ` (NH_(4))_(2)Cr_(2)O_(7)` isA. oxygenB. nitric oxideC. ammoniaD. nitrogen |
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Answer» Correct Answer - D `(NH_(4))_(2)Cr_(2)O_(7) overset( Delta)to N_(2)+Cr_(2)O_(3)+4H_(2)O` |
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| 412. |
Consider the regular array of vertical identical current carrying wires (with direction of current flow as indicated in the figure below) protruding through a horizontal table. If we scatter some diamagnetic particles on the table, they are likely to accumulate - A. around regions such as AB. around regions such as BC. in circular regions around individual wires such as CD. uniformly everywhere |
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Answer» Correct Answer - A |
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| 413. |
The distance between the vertex and the center of mass of a uniform solid planar circular segment of angular size `theta` and radius R is given by - A. `(4)/(3)R(sin(theta//2))/(theta)`B. `R(sin(theta//2))/(theta)`C. `(4)/(3)R cos((theta/(2))`D. `(2)/(3)R cos (theta)` |
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Answer» Correct Answer - A |
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| 414. |
Al2O3 reacts with (A) only water (B) only acids (C) only alkalis (D) both acids and alkalis |
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Answer» Correct Option :- (D) both acids and alkalis Explanation :- Al2O3 is amphoteric so it dissolve in acid as well in alkalis |
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| 415. |
Which of the following amino acids is NOT involved in gluconeogenesis ? (A) Alanine (B) Lysine (C) Glutamate (D) Arginine |
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Answer» Correct Option :- (B) Lysine Explanation :- Lysine can not be convert in Glucose |
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| 416. |
Which of the following entities causes syphilis? (A) Treponema pallidum (B) Neisseria gonorrhoea (C) HIV (D) Hepatitis B |
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Answer» Correct Option :- (A) Treponema pallidum Explanation :- Causative agent of Syphilis is Treponema Pallidum |
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| 417. |
A constant current (0.5 amp) is passed for 1 hour through (i) aqueous `AgNO_(3)` (ii) aqueous `CuSO_(4)` and (iii) molten `AlF_(3)` separately . The ratio of the mass of the metals deposited on the cathod is `[M_(Ag), M_(Cu), M_(Al)` are molar masses of the respectively metals]A. `Mg_(Ag):2M_(Cu):3M_(Al)`B. `Mg_(Ag):M_(Cu):M_(Al)`C. `6Mg_(Ag):3M_(Cu):2M_(Al)`D. `3Mg_(Ag):2M_(Cu):2M_(Al)` |
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Answer» Correct Answer - C `{:(,Ag^(+),,:,Cu^(2+),:,Al^(3+)),("no . of eq. deposit",x,:,x,:,x),("no. of mol deposit",(x)/(1),:,(x)/(2),:,(x)/(3)),(,6x,:,3x,:,2x),("no. of mole desposit",6,:,3,:,2),("mass deposit",6M_(Ag),:,3M_(Cu),:,2M_(Al)):}` |
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| 418. |
`Mg(OH)_(2)` is precipitated when NaOH is added to a solution of `Mg^(2+)` . If the final concentration of `Mg^(2+)` is `10^(-10)` .M, the concetration of `OH^(-)` (M) is the solution is b [Solubility product for `Mg(OH)_(2)=5.6xx10^(-12)`]A. 0.056B. 0.12C. 0.24D. 0.025 |
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Answer» Correct Answer - C `K_(sp) Mg(OH)_(2)=[Mg^(+2)][OH^(-)]^(2)` `5.6xx10^(-12)=[10^(-10)][OH^(-)]^(2)` `[OH^(-)]=sqrt(5.6xx10^(-2))=0.24 M` |
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| 419. |
A reaction has an activation energy of 209 KJ `"mol"^(-1)` . The rate increase 10-fold when the temperature is increased from `27^(@)C` to `X ""^(@)C` . The temperature X is closed to [Gas constant, R =`8.314 J "mol"^(-1) K^(-1)`]A. 35B. 40C. 30D. 45 |
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Answer» Correct Answer - A `log_(10)=(209xx10^(3))/(2.303xx8.314)[(1)/(300)-(1)/(T)]` `9.16xx10^(-5)=3.33xx10^(-3)-(1)/(T)` `T=308.4 K` or `35^(@)C=X` |
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| 420. |
A comet (assumed to be in an elliptical orbit around the sun) is at a distance of 0.4 AU from the sun at the perihelion. If the time period of the comet is 125 years, what is the aphelion distance ? AU : Astronomical Unit.A. 50 AUB. 25 AUC. 49.6 AUD. 24.6 AU |
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Answer» Correct Answer - C |
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| 421. |
The state of an ideal gas was changed isobarically. The graph depicts three such isobaric lines. Which of the following is true about the pressures of the gas ? A. `P_(1)=P_(2)=P_(3)`B. `P_(1)gt P_(2)gt P_(3)`C. `P_(1)lt P_(2)lt P_(3)`D. `P_(1)//P_(2)=P_(3)//P_(1)` |
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Answer» Correct Answer - B |
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| 422. |
Increasing the temperature increases the rate of reaction but does not increase the-A. number of collisionsB. activation energyC. average energy of collisionsD. average velocity of the reactant molecules |
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Answer» Correct Answer - B Informative |
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| 423. |
A metallic ring of radius a and resistance R is held fixed with its axis along a spatially uniform magnetic field whose magnitude is `B_(0)` sin `(omega t)`. Neglect gravity. Then,A. the current in the ring oscillates with a frequency of `2 omega` .B. the joule hearting loss in the ring is proportional to `a^(2)`,C. the force per unit length on the ring will be proportional to `B_(0)^(2)`.D. the net force on the ring is non-zero |
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Answer» Correct Answer - C |
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| 424. |
From equation (i) and (ii), `CohArrCO+(1)/(2)O_(2)[K_(c1)=9.0xx10^(-12)` at `1000^(@)C]` (i) `H_(2)OhArrH_(2)+(1)/(2)O_(2)[K_(c2)=7.0xx10^(-12)` at `1000^(@)C]` (ii) the equilibrium for the reaction `CO_(2)+H_(2)hArrCO+H_(2)O` at the same temperature isA. `0.78`B. `2.0`C. `16.2`D. `1.28` |
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Answer» Correct Answer - D (i) `CO_(2) hArr CO + 1/2O_(2) K_(1) = 9.1 xx 10^(-13)` (ii) `H_(2)O hArr H_(2) + 1/2 O_(2)K_(2) = 7.1 xx 10^(-12)` Object `CO_(2) + H_(2) hArr CO + H_(2)O` equation (i) - (ii) `:. K^(1) = (K_(1))/(K_(2)) = 1.28` `C_(t) = C_(0)e^(-kt)` `:. R = R_(0)e^(-kt)` |
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| 425. |
In metallic solids, the number of atoms for the face-centreed and the body-centered cubic unit cells, are, respectively-A. 2,4B. 2,2C. 4,2D. 4,4 |
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Answer» Correct Answer - C `"Fcc" = 8 xx 1/8 6 xx 1/2 = 4` `"Bcc" = 8 xx 1/8 + 1 xx 1 = 2` |
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| 426. |
The pulmonary artery carriesA. deoxygented blood to the lungsB. oxygented blood to the brainC. oxygenated blood to the lungsD. deoxygented blood to the kidney |
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Answer» Correct Answer - A Pulmonary artery arises from left ventricle & carry deoxygenated blood to the lungs. |
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| 427. |
Which of the following muscle types CANNOT be used voluntarily ?A. Both striated and smoothB. Both cardiac and struatedC. Both smooth and cardiacD. Cardiac, striated and smooth |
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Answer» Correct Answer - C Both smooth muscle (unstruated muscle) and cardiac muscle are functionally involumtary. |
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| 428. |
The stalk of a plant leaf is denived from which one of the following types of plant tissue? A. SclerenchymaB. ParenchymaC. ChlomnchymaD. Collenchyma |
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Answer» Correct Answer - D The stalk of a plant leaf (petiole) is reinforced by collenchyma. |
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| 429. |
The equilibirum constant `(K_(c))` of two reactions `H_(2)+I_(2)hArr2HIand N_(2)+3H_(2)hArr2NH_(3)` are 50 and 1000, respectively. The equilibirum constant of the raction `N_(2)4=6HI2NH_(3)+3I_(2)` is closeest to :A. 50000B. 20C. `0.008`D. `0.005` |
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Answer» Correct Answer - C `underline({:(H_(2)+I_(2)hArr2HI, ,K_(c)=50),(N_(2)3H_(2)hArr2NH_(3),,K_(c)=100):})` `{:(N_(2)+6HIhArr2NH_(3)+3I_(2),,K_(c)=(1000)/((50)^(3))),(,K_(c)=0.005):}` |
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| 430. |
The equilibirum constant `K_(c)` of the reaction, `2AhArrB+C "is" 0.5 "at" 25^(@)C and 1` atm. The raction will proceed in the backward direction when concentrations [A], [B] and [C] are respectively-A. `10^(-3),10^(-2) and 10^(-2) M`B. `10^(-1),10^(-2) and 10^(-2) M`C. `10^(-2),10^(-2) and 10^(-3) M`D. `10^(-2),10^(-3) and 10^(-3) M` |
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Answer» Correct Answer - A `Q=([B][C])/([A^(2)])&K_(C)=0.5` For option (A) `Q=((10^(-2))xx(10^(-2)))/([10^(-3)]^(2))=100` `& Qgt K_(C)` i.e., reaction proceed in backward direction |
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| 431. |
If the molar conductivities `("in" S cm^(2) "mol"^(-1))` of NaCl,Kci and NaOH at infinite diluation are 126, 150 and 250 respectively, the molar conductivity of KOH `("in" S "cm"^(2) "mol"^(-1))` is -A. 256B. 226C. 26D. 274 |
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Answer» Correct Answer - D `underline({:(126=lambda_(Na^(+))^(oo),+lambda_(Cl^(-))^(oo)),(150=lambda_(K^(+))^(oo),+lambda_(Cl^(-))^(oo)),(250=lambda_(Na^(+))^(oo),+lambda_(OH^(-))^(oo)):})` `(150+250-126)=lambda_(K^(+))^(oo)+lambda_(OH^(-))^(oo)` `or lambda_(KOH)^(oo)=274` |
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| 432. |
How many sex chromosomes does a normal human inherit from father?A. 1B. 2C. 23D. 46 |
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Answer» Correct Answer - A Either X or Y chromosome |
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| 433. |
During meiosis there is (A) one round of DNA replication and one division (B) two rounds of DNA replication and one division (C) two rounds of DNA replication and two division (D) one round of DNA replication and two division |
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Answer» Correct option (D) one round of DNA replication and two division Explanation: DNA replication occur in S phase just before to meiosis-I only it will not replicates in between meiosis-I & meiosis-II |
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| 434. |
During meiosis there is (A) one round of DNA replication and one division (B) two rounds of DNA replication and one division `(C)`two rounds of DNA replication and two division (D) one round of DNA replication and two division |
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Answer» Correct Answer - D DNA replication occur in S phase just before to meiosis-I only it will not replicates in between meiosis-I & meiosis -II |
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| 435. |
The oxdidation number of sulphur is +4 isA. `H_(2)S`B. `CS_(2)`C. `Na_(2)SO_(4)`D. `Na_(2)SO_(3)` |
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Answer» Correct Answer - d `H_(2)S^(-2)` `CS_(2)^(-2)` `Na_(2)overset(+6)(SO)_(3)` `Na_(2)overset(+4)(SO)_(3)` |
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| 436. |
`Al_(2)O_(3)` reacts withA. only waterB. only acidsC. only alkalisD. both acids and alkalis |
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Answer» Correct Answer - d `Al_(2)O_(3)` is amphoteric so it dissolve in acid as well in alkalis |
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| 437. |
When a person is suffering from high fever, it is someties observed that the skin has a reddish tinge. Why does this happen?A. Red colour of the skin radiates more heatB. Fever causes the release of a red pigment in the skinC. There is more blood circulation to the skin to keep the body warmD. There is more blood circulation to the skin to release heat from the body |
| Answer» Correct Answer - D | |
| 438. |
When a person is suffering from high fever, it is sometimes observed that the skin has a reddish tinge. Why does this happen ? (A) Red colour of the skin radiates more heat (B) Fever causes the release of a red pigment in the skin (C) There is more blood circulation to the skin to keep the body warm (D) There is more blood circulation to the skin to release heat from the body |
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Answer» Correct Option :- (D) There is more blood circulation to the skin to release heat from the body |
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| 439. |
Fruit wrapped in paper ripens faster than when kept in open air because -A. Heat of respiration is retained betterB. A chemical in the paper helps fruit ripeningC. A volatile substance produced by the fruit is retained better and helps in ripeningD. The fruit is cut off from the ambient oxygen which is an inhibitor to fruit repening |
| Answer» Correct Answer - C | |
| 440. |
Fruit wrapped in paper ripens faster than when kept in open air because- (A) Heat of respiration is retained better (B) A chemical in the paper helps fruit ripening (C) A volatile substance produced by the fruit is retained better and helps in ripening (D) The fruit is cut off from the ambient oxygen which is an inhibitor to fruit repening |
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Answer» Correct Option :- (C) A volatile substance produced by the fruit is retained better and helps in ripening |
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| 441. |
Insects constitute the largest animal group on earth. About `25-30%` of the insect species are known to be herbivores. In spite of such huge herbivore pressure, globally, green plants have persisted. One possible reason for this persistence is -A. Food preference of insects has tended to change with timeB. Herbiovors insects have become inefficient feeders of green plantsC. Herbivore population has been kept in control by predatorsD. Decline in reproduction of herbivores with time |
| Answer» Correct Answer - C | |
| 442. |
The image of an object O due to reflection from the surface of a lake is elongated due to the ripples on the water surface caused by a light breeze. This is because the ripples act as tilted mirrors as shown. Consider the case where O and the observer E are at the same height above the surface of the lake. If the maximum angle that the ripples make with the horizontal is α, the angular extent δ of the image will be (A) α/2(B) α (C) 2α (D) 4α |
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Answer» Correct option (C) 2α Explanation: From geometry when mirros are rorated by angle α, reflected ray are rotated by an angle 2α. |
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| 443. |
A novel species with double stranded genetic material consists of 5 bases namely P, Q, R, S& T with percentages given below Based on the above information which , ONE of the following inferences is NOT supported by the observations ?A. S base pairs with T , and Q base Pairs with RB. S base pairs with Q , and T base pairs with QC. P base pairs with R , and S base pairs with QD. P base pairs with R , and T base pairs with Q |
| Answer» Correct Answer - A | |
| 444. |
A 1.5 kW (kilo-watt) laser beam of wavelength 6400 Å is used to levitate a thin aluminium disc of same area as the cross section of the beam. The laser light is reflected by the aluminium disc without any absorption. The mass of the foil is close toA. `10^(-9) kg`B. `10^(-3) kg`C. `10^(-4) kg`D. `10^(-6) kg` |
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Answer» Correct Answer - D |
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| 445. |
A student studying the similarities and differences between a camera and the human eye makes the following observations. (I) Both the eye and the camera have convex lenses. (II) In order to focus, the eye lens expands or contracts while the camera lens moves forward or backward. (III) The camera lens produces upside down real images while the eye lens produces only upright real image. (IV) A screen in camera is equivalent to the retina in the eyes. (V) A camera ajusts the amount of light entering in it by adjusting the apeture of the lens. In the eye the cornea controls the amount of light. The correct statemetns are :A. Only (I), (II) (IV).B. Only (I), (III), (V).C. Only (I), (II), (IV), (V).D. All |
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Answer» Correct Answer - A |
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| 446. |
It was found that the refractive index of material of a certain prism varied as `1.5 + 0.004//lambda^(2)`, where `lambda` is the wavelength of light used to measure the refractive index. The same material was then used to construct a thin prism of apex angle `10^(@)`. Angles of minimum deviation `(delta m)` of the prism were recorded for the sources with wavelengths `lambda_(1)` and `lambda_(2)` respectively. ThenA. `delta_(m)(lambda_(1))ltdelta_(m)(lambda_(2))" if "lambda_(1)ltlambda_(2)`.B. `delta_(m)(lambda_(1))gtdelta_(m)(lambda_(2))" if "lambda_(1)gtlambda_(2)`.C. `delta_(m)(lambda_(1))gtdelta_(m)(lambda_(2))" if "lambda_(1)ltlambda_(2)`.D. `deltam` is the same in both the cases. |
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Answer» Correct Answer - C |
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| 447. |
A particle starts moving along a line from zero initial velocity and comes to rest after moving distance d. During its motion it had a constant acceleration f over 2/3 of the distance, and covered the rest of the distance with constant retardation. The time taken to cover the distance isA. `sqrt(2d//3f)`B. `2sqrt(d//3f)`C. `sqrt(3d//f)`D. `sqrt(3d//2f)` |
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Answer» Correct Answer - C |
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| 448. |
A long cylindrical pipe of radius 20 cm is closed at its upper end and has an airtight piston of negligible mass as shown. When a 50 Kg mass is attached to the other end of the pistion, it moves down. If the air in the enclosure is cooled from temperature T to `T – DeltaT`, the piston moves back to its original position. Then `DeltaT//T` is close to (Assuming air to be an ideal gas, `g = 10 m//s^(2)`, atmospheric pressure is `10_(5)` Pascal), A. `0.01`B. `0.02`C. `0.04`D. `0.09` |
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Answer» Correct Answer - C |
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| 449. |
The average energy of each hydrogen bond in A-T pair is x kcal `mol^(-1)` and that in G-C pair is y kcal `mol^(-1)`. Assuming that no other interaction exists between the nucleotides, the approximate energy required in kcal `mol^(-1)` to split the following double stranded DNA into two single strands is [each dashed line may represent more than one hydrogen bond between the base pairs ]A. 10x+9yB. 5x+3yC. 15x+6yD. 5x+4.5y |
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Answer» Correct Answer - A Number of H-bond is A-T pair=2, while no of H-bond in G-C pair is 3. Therefore (i) Total number of A-T. H-bond= number of A-T pair `xx` Number of H bond `=5xx2=10` (ii) Total number of G-C H-bond = number of G-C pair `xx` number of H bond `=3xx3=9` Total energy required to dissociate the stand =10x+9y kcal `mol^(-1)` |
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| 450. |
For the electrochemical cell show below `Pt|H_(2)(P=1 atm|H+(aq., x M)||Cu^(2+)(aq., q.0 M)|Cu(s)` the potential is 0.49 V at 298 K. The pH of the solution is closest to [Given: Standard reduction potential `E^(@)` for `Cu^(2+)//Cu` is 0.34 V gas constant , R is 8.31 J K-1 `mol^(-1)` Farady constant , F is `9.65xx104 JV^(-1) mol^(-1)]`A. 1.2B. 8.3C. 2.5D. 3.2 |
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Answer» Correct Answer - C `E=E^(@)=(0.591)/(n) log"" ("[Oxidation]")/("[Reaction]")` `0.49=0.37-(0.0591)/(n) log ""([H^(+)]^(2))/(P_(H_(2))xx1)` `0.15=(0.055)/(2)xx2- (log[H^(+)]^(2))/(pH)` `0.15=0.055xxpH` `pH=2.5` |
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