E2IIPART TEST 6 for NEET 2023

1.A body weighs 72 N on the surface of the earth. What is the gravitational force on it at a height equal to half the radius of the earth?

2.At what temperature will the RMS speed of oxygen molecules become just sufficient for escaping from the earth’s atmosphere? 
(Given: Mass of oxygen molecule (m) = 2.76 x 10^-26 kg, Boltzmann’s constant k_B = 1.38 × 10^-23 J K^-1):

3.If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?

4.The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are K_A, K_B and K_C respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then:

5.The acceleration due to gravity at a height 1km above the earth is the same as at a depth d below the surface of earth. Then 

6.Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will 

7.Starting from the centre of the earth having radius R, the variation of g (acceleration  due to gravity) is shown by:

8.At what height from the surface of earth the gravitation potential and the value of g are −5.4×10^7J kg−2 and 6.0 ms−2 respectively? (Take, the radius of earth as 6400 km.)

9.Kepler’s third law states that the square of the period of revolution (T) of a planet around the sun, is proportional to the third power of the average distance r between the sun and planet i.e. T²=Kr^3, here K is constant. If the masses of the sun and planet are M and m respectively, then as per Newton’s law of gravitation force of attraction between them is F=GMm/r², here G is gravitational constant. The relation between G and K is described as

10.Two spherical bodies of masses M and 5M and radii R and 2R are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is

11.A remote sensing satellite of earth revolves in a circular orbit at a height of 0.25 x 10⁶ m above the surface of earth. If earth’s radius is 6.38×10⁶ m and g=9.8ms^-1, then the orbital speed of the satellite is

12. Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by 

13.Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m,  4m, 8m, respectively from the origin. The resulting gravitational potential due to this system at the origin will be

14.The radii of circular orbits of two satellites A and B of the earth are 4R and R, respectively.If the speed of satellite A is 3v, then speed of satellite B will be

15.The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for planet to move from C to D and t2 is the time to move from A to B, then

16.

17.

A mild steel wire of length 2L and cross-sectional area A is stretched, well within elastic limit, horizontally between two pillars (figure ). A mass m is suspended from the mid-point of the wire. Strain in the wire is

18.The Young’s modulus of a wire of length ‘L’ and radius ‘r’ is ‘Y’. If length is reduced to L/2 and radius r/2, then Young’s modulus will be 

19.

20.Three wires A, B, C made of the same material and radius have different lengths. The graphs in the figure show the elongation-load variation. The longest wire is 

21.Consider two cylindrical rods of identical dimensions, one of rubber and the other of steel. Both the rods are fixed rigidly at one end to the roof. A mass M is attached to each of the free ends at the centre of the rods.

22.Copper of fixed volume V is drawn into a wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is  Δl. Which of the following graphs is a straight line?

23.Practically range of Possion’s ratio σ is

24.A wire is stretched by 1 kg wt. If the radius of the wire is doubled, its Young’s modulus will be

25.The Young’s modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of :

26.The following four wires are made of the same material. Which of them will have the largest extension when the same tension is applied?

27.The material which practically does not show elastic after effect is

28.. Why the spring is made up of steel in comparison of copper?

29.Two wires of copper having the length in the ratio of 4: 1 and their radii ratio of 1: 4 are stretched by the same force. The ratio of longitudinal strain in the two will be:

30.

There is no change in the volume of a wire due to change in its length on stretching. The Poisson’s ratio of the material of the wire is

31.For a monocotyledonous seed the exact location of an embryo in the endosperm is

32.Match the following

Column-I                                            Column-II

I. Epipetalous Plant                          P.     Mustard

II. Syncarpous plant                   Q.    Calotropis

III.  False septum                          R.      Pea

IV.Valvate aestivation              S.Brinjal

                                                    T. Argemone

 33.All of the following statements are correct except

34.Refer to the diagram

35.In cymose type of inflorescence the main axis terminates in a flower, hence is limited in growth. The flowers are borne in a

36.Which type of the modification can be shown here

37.Euphorbia modified its stems for

38.The green expanded part of the leaf with veins and veinlets is known as

39.Which one is the correct formula for the given floral diagram?

40.Belladonna, Ashwagandha belongs to the family

41.Calvin proposed that

42.The movement of chloroplast due to streaming is easily visible in

43. All of the following statements are correct except

44.Assertion: Ψs is always negative

Reason: If a pressure greater than atmospheric pressure is applied to pure water or a solution, its water potential increases

45.“A mature corn plant absorbs almost three litres of water in a day, while a mustard plant absorbs water equal to its own weight in about 5 hours”- From this we can conclude that

46.In which of the following mechanism requires special membrane proteins?

47.Which of the following mechanism is very sensitive to inhibitors?

48.Porins are involved in

49.When the turgor pressure is Zero the plant cell condition will be

50.The correct order of Symplastic water movement in the root is

51.Living organism growing in a natural environment will show

52.Which of the following statement(s) is/are true regarding dedifferentiation?

1. I.   Formation of meristems – interfacsicular cambium and cork cambium from fully differentiated parenchyma cells
2. II.   Cells positioned away from root apical meristems differentiate as root-cap cells, while those pushed to the periphery mature as epidermis

• III. Differentiation in plants is open, because cells/tissues arising out of the same meristem have different structures at maturity
• IV.  All are true

53.Which of the following substance is carotenoid derivative?

54.From tips of coleoptiles of oat seedlings F.W. Went isolated

55.Callus refers to

56.2,4-D is widely used in

57.All are correct except

58.Which of the following PGR is responsible for the increase of stem length?

59.Apical dominance is overcome by

60. Identify the A,B, C in the following diagram

61.1 g H₂ gas at STP is expanded irreversibly so that volume is doubled. Hence, work done is:

62.Carnot cycle is said to have 25 % efficiency when it operates between T (source) and 300 K (sink). Temperature, T is,

63.Heat of neutralization of oxalic acid is -25.4 kcal mol^-1 using strong base, NaOH. Hence enthalpy change of complete dissociation of oxalic acid is:

64.If a gas absorbs 200 J of heat and expands by 500 cm³ against a constant pressure of 2 × 10⁵ N m^-2, then change in internal energy is:

65.  T.∆S represents:

66.The third law of thermodynamics states that in the limit T → 0

67.Consider the following statements:

I. Spontaneous processes involving macroscopic objects proceed with a decrease in potential energy.

II.  Expansion of an ideal gas is a spontaneous process in which there is no change of energy at all

III.  For a spontaneous process in an isolated system, the change in entropy is positive

Select the correct statements:

68.∆G and ∆H for a reaction at 300 K is -66.9 kJ mol^-1 and -41.8 kJ mol^-1 ∆G (kJ mol^-1) for the same reaction at 330 K is,

69.One mol of an ideal gas (C_V = 20 J K^-1 mol^-1) initially at STP is heated at constant volume to twice the initial temperature. For the process. W (kJ) and q (kJ) respectively will be,

70.A certain reaction is exothermic by 220 kJ and does 10 kJ of work. What is the change in the internal energy of the system at constant temperature?

71.In the process of dissolving sugar in water, the entropy increases. This means that the signs of ∆S is …, and that the randomness of the system …

72.A process which is unfavorable with respect to enthalpy, but favorable with respect to entropy:

73.When solid melts, there is

74.Kinetic energy of a particle of 20 g is 4 J while that of another particle of same mass is 16 J. Hence, velocity ratio of their motion is:

75.Although dissolution of NH₄Cl in water is endothermic yet it dissolves because:

76.For the following reaction,

Zn + Cu²⁺ ⇋ Cu + Zn²⁺

     entropy change is 96.5 J mol^-1 K^-1 then temperature coefficient (VK^-1) of the reaction is,

77.Which has maximum entropy of vaporization?

78.Two moles of an ideal gas at 2 bar and 27^oC expand isothermally and reversibly to a pressure of 1 bar. The wok done by the gas is equal to:

79.The adsorption of a vapor on a clean surface is a spontaneous process because:

80.All of the statements regarding the symbol ∆G are true except:

81.PCl₅ is 40% dissociated when pressure is 2 atm. It will be 80% dissociated when pressure is approximately:

82.N₂ + 3H₂ ⇋ 2NH₃. This is gaseous phase reaction taking place in 1 L flask at 127^o Starting with 1 mol N₂ and 3 mol H₂, equilibrium mixture required 500 mL of 1 M HCl. Hence, K_c is approximately:

83.For the equilibrium in a closed vessel: PCl₅ (g) ⇋ PCl₃ (g) + Cl₂ (g)

K_p is found to be double of K_c. This is attained when T is:

84.Consider the following gas-phase reaction:

2A(g) + B(g) ⇋ C(g) + D(g)

An equilibrium mixture of reactants and products is subjected to the following changes:

I.A decrease in volume

II.An increase in temperature

III.Addition of reactants

IV.Addition of an inert gas

Which of these changes affect the composition of the equilibrium mixture but leaves the value of K_c unchanged?

85.Which of the following relative values of k_f (rate constant of forward reaction) and k_b (rate constant of backward reaction) results in an equilibrium mixture that contains large amounts of reactants and small amounts of products:

86.Kp / Kc for the reaction:

CO (g) + ½ O₂(g) ⇋ CO₂ (g) will be,

87.In presence of catalyst, when happens to the chemical equilibrium?

88.If reaction quotient (Q) = 1 for a reaction then:

89.Select the incorrect statement from the following:

90.Boiling point of liquid water increases when: