NEET 7
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17. Identify the metal that occurs in free state(a) Al(b) Au(c) Mg(d) Ca
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22. Assertion(A) : Zone refining is carried out in an inert gas atmosphereReason (R):The metal is treated with a suitable reagent which can form a volatilecompound with the metal.a) Both (A) and (R) are true and (R) is the correct explanation of (A).b) Both (A) and (R) are true and (R) is not the correct explanation of (A).c) (A) true but (R) false.d) Both (A) and (R) are false
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14. Which one of the following element is present as a~ impurity in pig iron?(a) Phosphorus(b) Manganese(c) Carbon(d) Silicon
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2. The dimension of Plank's constant equals to that of- [AIPMT-2001] (1) Energy (2) Momentum (3) Angular momentum (4) Power *
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21. Assertion :Aluminium is used in the, design of chemical reactors, : medicalequipments, , refrigeration units and gas' pipelines.Reason : Aluminium shows high resistance to corrosion(a) Both (A) and (R) are true and (R) is the correct explanation of (A)(b) Both (A) and (R) are true and (R) is not the correct explanation of (A).(c) (A) true but (R) false(d) Both (A) and (R) are false
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6. Considering Ellingham diagram, which of the following metals can be used toreduce alumina? (NEET-2018)(a) Fe(b) Cu(c) Mg(d) Zn
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11. The concept of 'Field' was introduced by(a) Faraday(b) Gauss(c) Maxwell(d) None
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15. Assertion: When dielectrics like mica or paper or oil are introduced between the plates of acapacitor then the capacitance will increase.Reason: Capacitance is directly proportional to the potential difference.(a) Assertion and Reason are correct and Reason is the correct explanation of Assertion.(b) Assertion and Reason are true but Reason is the false explanation of the Assertion.(c) Assertion is true but Reason is false.(d) Assertion is false but Reason is true.
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19. If a body starts from rest, the time in which it covers a particular displacement with uniform acceleration is- (1) inversely proportional to the square root of the displacement (2) inversely proportional to the displacement (3) directly proportional to the displacement (4) directly proportional to the square root of the displacement *
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1. Which pair have not equal dimensions- [AIPMT-2000] (1) Energy and torque (2) Force and impulse (3) Angular momentum and Plank's constant (4) Elastic modulus and pressure *
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2. Gauss law is another form of ________.
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9. The electrostatic force is always greater in magnitude than gravitational force for_________SIZE object.
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6. Which of the following system of units is not based on units of mass, length and time alone ? (1) SI (2) MKS (3) FPS (4) CGS *
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24. A simple pendulum is suspended from the ceiling of a vehicle, its time period is T. Vehicle is moving with constant velocity, then time period of simple pendulum will be: [RPMT-2003] (1) Less than T (2) Equal to T (3) More than T (4) Cannot predict *
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1. The metal oxide which cannot be reduced to metal by carbon is(a) PbO(b) AL2O3(c) ZnO(d) Feo
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12. Percentage error in measuring the radius and mass of a solid sphere are 2% and 1% respectively.  Then error in measurement of moment of inertia with respect to its diameter is- (1) 3% (2) 6% (3) 5% (4) 4% *
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6. Torque experienced by a dipole in an electric field when it is placed parallel to the fieldis ______.  
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25. Froth floatation process is suitable for concentrating ______ores.(a) oxide(b) carbonate(c) sulphide(d) halide
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5. Extraction of gold and silver involves leaching with cyanide ion. silver is laterrecovered by (NEET-2017)(a) Distillation(b) Zone refining(c) Displacement with zinc(d) liquation
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15. Which of the following mineral contains calcium as well as magnesium?(a) Zinc bien de(b) Aragonite(c) Dolomite(d) Carnalite
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8. A parallel plate capacitor stores a charge Q at a voltage V. Suppose the area of the parallelplate capacitor and the distance between the plates are each doubled then which is thequantity that will change?
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11. Which of the following is commonly used to produce foam in froth floatationprocess?(a) Pine oil(b) Cresol(c) NaCN(d) Xanthate
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10. In a hydrogen atom the electron revolves around the proton in an orbit of 0.53 . Thepotential produced by the electron on the nuleus is(a) 6.8 V(b) 13.6 V(c) 54.4 V(d) 27.2 V
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3. Electrochemical process is used to extract(a) Iron(b) Lead(c) Sodium(d) silver
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2. Which of the metal is extracted by Hall-Heroult process?(a) Al(b) Ni(c) Cu(d) Zn
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24. In Hall-Herold process___________act as an, anode.(a) Carbon blocks(b) hydrogen(c) copper rods(d) Zinc rods
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16. Identify the halide ore among the following(a) Epsom Salt(b) Pyrolusite(c) Anglesite(d) Rock SALT
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20. Semiconductors are purified by_______method.(a) Zone refining(b) Electrolytic refining(c) Mond's process(d) Beisemerisation
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5. The force between two charges at a particular distance in air is 36 N. If the distancebetween the charges is filled by a medium of dielectric constant 6, then the forceis__________.
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8. If the units of length and force are increased four times, then the unit of energy will- (1) becomes 8 times (2) becomes 16 times (3) decrease 16 times (4) increase 4 times *
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10. If dimensions of A and B are different, then which of the following operation is valid ?         [RPMT-2008] (1)A/B   (2) e^–A/B (3) A – B (4) A + B *
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3. Which charge configuration produces a uniform electric field?
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4. The density of a material in CGS system of units is 4 g/cm3. In a system of units in which unit of length is 10 cm and unit of mass is 100g, the value of density of material will be – [AIPMT Mains-2016] (1) 0.04 (2) 0.4 (3) 40 (4) 400 *
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9. Which of the following is a dimensional constant ? (1) Refractive index (2) Dielectric constant (3) Relative density (4) Gravitational constant *
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3. The ratio of the dimension of Plank's constant and that of the moment of inertia is the dimension of- [AIPMT-2005] (1) Velocity (2) Angular momentum (3) Time (4) Frequency *
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14. Van de Graaff generator produces an electrostatic potential difference of_______ volts.(a) 10^8(b) 10^9(c) 10^7(d) 10^10
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5. Which of the following does not have the dimensions of force ? (1) Potential gradient (2) Energy gradient (3) Weight *
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21. The acceleration of a particle executing S.H.M. is   (1) Always directed towards the equilibrium position (2) Always towards the one end (3) Continuously changing in direction (4) Maximum at the mean position   *
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13. Which of the following will give respective metal by self reduction?(a) Galena (Pbs)(b) HgS(c) ZnS(d) Both (a) & (b)
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11. A vernier callipers has 20 divisions on the vernier scale which coincide with 19 divisions on the main scale.  The least count of the instrument is 0.1 mm.  The main scale divisions are of- (1) 0.5 mm (2) 1 mm (3) 2 mm (4) 1/4  mm *
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17. The area under acceleration-time graph gives- [KERALA PET-2005] (1) Distance travelled (2) Change in acceleration (3) Force acting (4) Change in velocity *
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15. A car covers half of the distance with speed 60 km/hr and rest of the half with speed 30 km/hr. The average speed of the car is - (1) 45 km/hr (2) 40 km/hr  (3) 20.0 km/hr (4) 50 km/hr *
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12. When 4V emf is applied across a 1F capacitor, it will store energy of(a) 2J(b) 4J(c) 6J(d) 8J
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12. Name the process by which elements such as germanium, silicon and galium arerefined.(a) Vapour phasemethod(b) Electrolyticrefining(c) Zonerefining(d) Van-Arkelmethod
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22. Assertion : A simple pendulum is mounted on a truck which move with constant velocity. The time period of pendulum will increases. Reason : The effective length of pendulum will decrease. (1) A (2) B (3) C (4) D *
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18. Pick out the alloy that contains a non-metal as a constituent in it(a) Brass(b) Bronze(c) Steel(d) Invar
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10. Which of the following is not a mineral of aluminium?(a) Bauxite(b) Cryolite(c) China clay(d) Malachite
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7. In the electrolytic refining of copper, which one of the following is used as anode?(a) Pure copper(b) Impure copper(c) Carbon rod(d) Platinum electrode
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4. Flux is a substance which is used to convert(a) Mineralinto silicate(b) Infusible impurities tosoluble impurities(c) Soluble impurities toinfusible impurities(d) All ofthese
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14. The density of a cube is measured by measuring its mass and the length of its side.  If the maximum errors in the measurement of mass and length are 4% and 3% respectively, the maximum error in the measurement of the density is- (1) 9 % (2) 13 % (3) 12 % (4) 7 % *
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9. Which metal is used for extraction of Au and Ag and also for galvanisation of ironobjects?(a) Mg(b) Zn(c) Cr(d) Co
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23. A mass of 10g is connected to a massless spring then time period of small oscillation is 10 seconds. If 10 g mass is replaced by 40 g mass in same spring, then its time period will be:- [RPMT-2007] (1) 5s (2) 10s (3) 20s (4) 40s *
4 points
19. In acid leaching process. the insoluble sulphide is converted into soluble sulphateand elemental_________(a) carbon(b) lead(c) sulphur(d) zinc
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8. Which of the following is not true with respect to Ellingham diagram?(a) Free energychanges follow astraight line.Deviation occurswhen there is aphase change.(b) The graph forthe formation ofCO2 is a straightline almost parallelto free energy axis.(c) Negative slopeof CO shows that itbecomes morestable with increasein temperature(d) Positive slope ofmetal oxides showsthat their stabilitiesdecrease withincrease intemperature
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13. The electric flux through a surface will be minimum when the angle between Eand A is(a) 90°(b) 60°(c) 0°(d) 45°
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13. Zero error of an instrument introduces- (1) Systematic errors (2) Random errors (3) Both (4) None *
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25. The maximum velocity and acceleration of a particle in S.H.M. are 100 cm/sec and 157 cm/sec2 respectively. The time period in seconds will be: (1) 4 (2) 1.57 (3) 0.25 (4) 1 *
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7. Radio waves of constant amplitude can be generated with- (1) Filter (2) Rectifier (3) FET (4) Oscillator *
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1. For a large charge accumulation, the end of the conductor should have larger curvature thatis_________.
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16. Assertion : A body, whatever its motion is always at rest in a frame of reference which is fixed to the body itself. Reason : The relative velocity of a body with respect to itself is zero. (1) A   (2) B   (3) C   (4) D *
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7. Two point charges +q and -q are placed at points A and B respectively separated by a smalldistance. The electric field intensity at the midpoint O of AB :
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18. the displacement 'x' of a particle moving along a straight line at time t is given by x = a0 + a1t + a2t2.  The acceleration of the particle is-[AFMC-1999] (1) a1 (2) a2 (3) 2a2 (4) 3a2 *
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23. Assertion :A dilute solution of NaCN is used for leaching ores of silver and gold.Reason : Impurities present in these ores dissolve in NaCNa) Both assertion and reason are true and the reason is the correct explanation ofthe assertion.b) Both assertion and reason are true but the reason is not the correct explanation ofthe assertion.c) Assertion is true, but reason is false.d) Both assertion and reason are false
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20. A body starting from rest and has uniform acceleration 8 m/s2. The distance travelled by it in 5th second will be - (1) 36m (2) 40m (3) 100m (4) 200m *
4 points
4. When the amber is rubbed with fur, it absorbs bits of papers. This was inventedby_______.
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