PART TEST 11 FOR NEET 2021

1. Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum

2. One of the representatives of Phylum Arthropoda is –

3. Select the Taxon mentioned that represents both marine and fresh water species –

4. Which one of the following structures in Pheretima is correctly matched with its function?

5. Peripatus is a connecting link between

6. Which one of the following is the true description about an animal concerned?

7. Eutherians are characterized by –

8. Which one of the following is not a living fossil?

9. Which of the following animals is not viviparous?

10. Which one of the following is a matching set of phylum and its three
examples?

11. Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is Correct?

12. Collenchyma occurs in the stem and petioles of-

13. Read the different components from (a) to (d) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem: (a) Secondary cortex (b) Wood (c) Secondary phloem (d) Phellem. The correct order is –

14. Tracheid differ from other tracheary elements in:

15. Ground tissue includes –

16. Gymnosperms are also called soft wood spermatophytes because they lack –

17. Axillary bud and terminal bud are derived from the activity of –

18. Function of companion cells is –

19. Periderm is produced by –

20. As compared to a dicot root, a monocot root has –

21. Which of the following is an opiate narcotic?

22. Grafted kidney may be rejected in a patient due to –

23. Motile zygote of Plasmodium occurs in-

24. At which stage of HIV infection does one usually show symptoms of AIDS ?

25. Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit multiplication of viruses are called

26. Common cold differs from pneumonia in that –

27. Which of the following viruses is not transferred through semen of an infected male?

28. If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

29. The permissible use of the technique amniocentesis is for:

30. The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms as that of –

31. What is the specific rotation of aqueous solution of sucrose? (before hydrolysis)

32. Which sugar indicates mutarotation?

33. Proline amino acid contains__________________ amino acid

34. Cellulose consist of long chain of

35. Unit formed by attachment of which carbon of nucleoside to phosphate ion is known
as nucleotide

36. Purine base is

37. Which of the following is polyamide molecule

38. copolymer is

39. Melmac is a polymer or melamine and

40.Starch is the condensation polymer of

41. Gutta percha is

42. Which of the following is not a thermosetting polymer

43. A drug that is antiseptic as well as analgesic is

44. Aspiring is an acetylation product of ______

45. Which of the following can possibly be used as analgesic without causing addiction and modification?

46. Match List-I with List-II and select the correct answer using the code given below in the Lists.

47. Which compound is antioxidant?

48. The polar head of sodium stearate is

49. What will be the intercept in a graph of Freundlich adsorption isotherm ?

50. Which of the following is an example of homogeneous catalysis ?

51. From which of the following effect colloidal system is free ?

52. Which of the following has minimum value of coagulation for As2S3 ?

53. 0.25g of starch sol is required to prevent coagulation of 10ml gold sol when 1 ml of 10% NaCl solution is present. What is gold number of starch sol ?

54. Surface-tension of lyophobic sol is

55. Silverore isrelated with NaCN(aq) to

56. Blister copper is

57.The slag obtained during manufacture of Cu is

58. Match List-I with List-II and select the correct answer using the code given below in the Lists.
             Set 1                                                      Set 2
a. Earthly impurities            p) Froth flotation
b. Sulphideores                     q) Magnetic separation
c. Bauxite                                r) Gravity separation
d. Magnetite                           s) Leaching

59. Group 1 & 2 elements are extracted by

60. An ore after concentration was found to have basic impurities. The flux which can be used is

61. In a radioactive substance at t = 0, the number of atoms is 8×10^4, its half-life period is 3 yr. the number of atoms 1×10^4 will remain after interval

62. The half-life of radium is 1622 years. How long will it take for seven-eighth of a given amount of radium to decay

63. The mass of a proton is 1.0073 u and that of the neutron is 1.0087 u (u = atomic mass unit) the binding energy of 2He^4 is (mass of helium nucleus = 4.0015 u)

64. Solar energy is due to

5. The foil bone has a 14C : 12C  ratio, which is  [ 1/16 ] of  that in a living animal bone. If the half-life time of  14C  is  5730 years, then the age of the fossil bone is

66. Which one of the following is a possible nuclear reaction?

7. Assertion:  Cobalt-60 is useful in cancer therapy. 
Reason:  Cobalt-60 is a source of y-radiations capable of killing cancerous cells.

68. The magnetic moment ( μ) of a revolving  electron around the nucleus varies with principal quantum number n as

69. When an electron-positron pair annihilates, the energy released is about

10. The dependence of binding energy per nucleon, BA  on the mass number A, is represented by

71. The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K is best described by:

12. If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is:

73. Identify the semiconductor devices whose characteristics are given below, in the order (a), (b), (c), (d):

74. A charge Q is uniformly distributed over the surface of non conducting disc of radius R. The disc rotates about an axis perpendicular to its plane and passing through its centre with an angular velocity ω. As a result of this rotation, a magnetic field of induction B is obtained at the centre of the disc. If we keep both the amount of charge placed on the disc and its angular velocity to be constant and vary the radius of the disc than the variation of the magnetic induction at the centre of the disc will be represented by the figure

75. In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be

76.In the circuit below, A and B represent two inputs and C represents the output. The circuit represents

77.If in a p-n junction diode, a square input signal of 10V is applied as shown Then the output signal across RL will be 

78.For the given uniform square lamina ABCD, whose centre is O,

79. A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold then, an electric current will

80.If the ratio of the concentration of electrons that of holes in a semiconductor is 7 /5 and the ratio of currents is 7/4, then what is the ratio of their drift velocities?

81.In a common base mode of a transistor, t collector current is 5.488 mA for an emit current of 5.60 mA. The value of the base current amplification factor (β) will be

82.In the given figure, potential difference between A and B is 

83. In a common emitter transistor amplifier, the audio signal voltage across the collector is 3V. The resistance of collector is 3kΩ. If current gain is 100 and the base resistance is 2kΩ, the voltage and power gain of the amplifier is 

84. Which one of the following represents forward biased circuit?

85.What is the output Y in the following circuit, when all the three inputs A,B,C are first 0 and then 1 ?

86.The radius of a nucleus of a mass number A is directly proportional to

87.The nuclei 6C13 and 7N14 can be described as

88. Which of the following statements is true for nuclear forces?

89.The binding energy per nucleon of deuterium and helium atom is 1.1 MeV and 7.0 MeV. If two deuterium nuclei fuse to form a helium atom, the energy released is 

90.A hemisphere is positively charged uniformly. The electric field at a point on a diameter away from the centre is directed