E2II PART TEST 8 For NEET 2022

1.

2.A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then distance d in cm will be

3.A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is

4.An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and  3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is

5.An object approaches a convergent lens from the left of the lens with a uniform speed 5 m/s and stops at the focus. The image

6.A passenger in an aeroplane shall

7.An astronomical telescope has an objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance of :

8.Match the corresponding entries of Column 1 with Column 2. [Where m is the magnification produced by the mirror]

Column 1                         Column 2 
A. m=-2                     a. Convex mirror   
B. m=-1/2                  b. Concave mirror
C. m=+2                    c. Real image
D. m=+1/2                 d. Virtual Image

9.You are given four sources of light each one providing a light of a single colour – red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90°. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

10.The refracting angle of a prism is A, and refractive index of the material of the prism is cot(A/2). The angle of minimum deviation is-

11.The radius of curvature of the curved surface of a planoconvex lens is 20 cm. If the refractive index of the material of the lens be 1.5, it will

12.The phenomena involved in the reflection of radiowaves by ionosphere is similar to

13.The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index μ of the prism is

14.A plane-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices μ₁ and μ₂ and R is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is

15.For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D. Using this information, the distance between the retina and the cornea-eye lens can be estimated to be

16.When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. This implies that the liquid must have refractive index 

17.The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1, 2, 3 and 4 (figure). Which of the four rays correctly shows the direction of reflected ray?

18.A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options describes best the image formed of an object of height 2 cm placed 30 cm from the lens?

19.

A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be

20.An astronomical refracting telescope will have large angular magnification and high angular resolution when it has an objective lens of:-

21.A beam of light consisting of red, green, and blue colors is incident on a right-angled prism. The refractive index of the material of the prism for the red, green, and blue wavelengths is 1.39, 1.44, and 1.47 respectively. 

The prism will :

22.The optical density of turpentine is higher than tnat of water while its mass density is lower. Figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in figure, the path shown is correct?

23.Two identical thin plano-convex glass lenses (refractive index = 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with the oil of refractive index 1.7. The focal length of the combination is:

24.A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is 1.39 x10⁹ m and its mean distance from the earth is 1.5 x 10¹¹ m. What is the diameter of the sun’s image on the paper?

25.. An object is placed on the principal axis of a concave mirror at a distance of 1.5f ( f is the focal length). The image will be at:

26.The power of a biconvex lens is 10 dioptre and the radius of curvature of each surface is 10 cm. Then the refractive index of the material of the lens is, 

27.Find the value of the angle of emergence from the prism. The refractive index of the glass is √3

28.A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40 cm from it, the final image would be formed at a distance of:

29.A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be

30.A light ray is incident perpendicularly to one face of a 90° prism and is totally internally reflected at the glass-air interface. If the angle of reflection is 45°, we conclude that the refractive index

31.Study the following diagram and name the following parts

32.Which of the following statement is true for Nucleoid?

33.A.The beads-on-string structure in chromatin is packaged to form chromatin fibres that are further coiled and condensed at _______(i)_________ of cell division to form chromosomes

B.Euchromatin is said to be transcriptionally________(ii)_______ chromatin

C.When Streptococcus pneumoniae (pneumococcus) bacteria are grown on a culture plate; some produce smooth shiny colonies (S) while others produce rough colonies (R). This is because the S strain bacteria have _______(iii)_______coat, while R strain does not

D.Digestion with ________(iv)________did inhibit transformation experiment

34.Hershey and Chase worked to discover

35.Which of the following contains RNA as genetic material?

36.DNA polymerase can replicate at a rate of

37.The template with polarity 3’à5′, the replication is

38.Find out A and B in the given diagram

39.Which of the following statement(s) is/are correct?

I. Polycistronic gene is a characteristic  feature of eukaryotes

II. Inheritance of a character cannot be affected by promoter and regulatory sequences of a structural gene

• III. Sometimes regulatory sequences do not code for any RNA or protein
• IV. There is only single DNA-dependent RNA polymerase that catalyses transcription of all types of RNA in bacteria

40.The substrate of RNA polymerase during polymerisation reaction is

41.Refer to the given diagram

Identify the Process along with A and B

42. Assertion: RNA polymerase polymerises in a template depended fashion following the rule of complementarity.

Reason: It facilitates opening of the helix and continues elongation.

43.In Eukaryotes snRNAs and hnRNA are transcribed by respectively

44.All of the following statements are correct except

45.Refer to the diagram

In presence of an inducer, which of the following gene in the diagram will produce permease?

46.The European Federation of Biotechnology (EFB) defines Biotechnology as

47.The linking of antibiotic resistance gene with the plasmid vector would not be possible without

48.Identify the correct sequence to modifying an organism genetically

I.Introduction of the identified DNA into the host

II.Identification of DNA with desirable genes

III.Maintenance of introduced DNA in the host and transfer of the DNA to its progeny

49.Statement-1: Restriction endonuclease is responsible for restricting the growth of bacteriophage in Escherichia coli.

Statement-2: It was found that EcoRI always cut DNA molecules at a particular point by recognising a specific sequence of six base pairs.

50.Exonucleases remove nucleotides from

51.Refer to the diagram and say the direction of movement of the DNA fragments in an electric field

52.All of the following statements are correct except

53.Identify the procedure shown in the given diagram

54.In _________step of PCR heat is induced

55.A selectable marker does not include

56.A bioreactor contains all except

57.Which of the following have the ability to transform normal cells into cancerous cells in animals

58.In EcoRI, R refers to

59.

1. Which of the following statement(s) is/are correct?

I. The palindrome in DNA is a sequence of base pairs that reads different on the two strands when orientation of reading is kept the same

II. When cut by the same restriction enzyme, the resultant DNA fragments have the same kind of ‘sticky-ends’

III. The ability to multiply copies of antibiotic dependent gene in E. coli was called cloning

IV. Stanley Cohen and Herbert Boyer accomplished this in 1972 by isolating the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance

60.For a tetracycline resistance gene in the vector pBR322,the ligation of a foreign DNA should be at

61.How many faradays are required to reduce one mole of MnO₄^– to Mn²⁺?

62.During electrolysis of aqueous zinc nitrate:

63.For the cell, Zn(s) | Zn²⁺ || Cu²⁺ | Cu(s), the standard cell voltage is 1.10 V. When a cell using these reagents was prepared in the lab, the measured cell voltage was 0.98 V. One possible explanation for the observed voltage is:

64.For the cell Zn | Zn²⁺ (C1) || Zn²⁺ (C2) | Zn, ∆G is negative if,

65.For the given cell Ag | AgNO₃ (1 M) || AgNO₃ (2 M) | Ag, E_cell is:

66.1 mol Ag₂CO₃ is strongly heated to a constant weight. Residue will be:

67.In an electrochemical cell that functions as a voltaic cell:

68.When a lead storage-battery is discharged:

69.Specific conductance of 0.01 N KCl solution is x ohm^-1cm^-1 having conductance y ohm^-1. Specific conductance of 0.01 N NaCl having conductance z ohm^-1, is:

70.Equivalent conductance of 1 M CH₃COOH is 10 ohm^-1 cm² equiv^-1 and at infinite dilution 200 ohm^-1 cm² equiv^-1. Hence % of ionization of CH₃COOH is,

71.If E^o(Fe²⁺/Fe) is x₁ and E^o(Fe³⁺/Fe) is x₂, then E^o(Fe³⁺/Fe²⁺) will be:

72.The decomposition of N₂O into N₂ and O in presence of gaseous argon follows second order kinetics with k = (5.0 × 10¹¹ L mol^-1 s^-1). exp(-29000(K)/T). Hence the activation energy is,

73.At a certain temperature, the first-order rate constant k₁ is found to be smaller than the second-order rate constant k₂. If the E_a(1) of the first order reaction is greater than E_a(2) of the second order reaction, then as temperature is raised:

74.For a reaction for which the activation energies of the forward and reverse directions are equal in value:

75.Rate constant of a reaction is 0.0693 min^-1. Starting with 10 mole, rate if the reaction after 10 min is:

76.Select the incorrect statement from the following:

77.For the reaction, A₂ + 2B → 2AB,

Order of reaction with respect to A₂ and B are respectively:

78.In presence of catalyst E_a is lowered by 2 kcal at 27^o Hence the rate of reaction will be:

79.Consider following statements:

I. Rate of reaction is an extensive property

II.  Rate of reaction per unit volume is an intensive property

III.  Rate of reaction is independent on temperature

Select the correct statement(s):

80.Half-life period of the first-order reaction is 100 days. After 144.3 days, concentration of the reactant is reduced to __________ of original value.

81.When temperature of a reaction is changed from T₁ and T₂, half-life is found to decrease, Thus:

82.Two reactions with different activation energies have the same rate at room temperature. Which statement correctly describes the rates of these two reactions at the same higher temperature:

83.How much will the potential of a hydrogen electrode change when its solution initially at pH = 0 is neutralized to pH = 7?

84.The temperature coefficient of a galvanic cell is +5.0 × 10^-5 V K^-1. During the discharge of the cell, the cell temperature

85.Consider the following reaction

2Fe (s) + O₂ (g) + 4H⁺ → 2Fe²⁺ (aq) + 2H₂O (l)

At [Fe²⁺] = 10^-3 M, p(O₂) = 0.1 atm and pH = 3, the cell potential at 25^oC is:

86.In a galvanic cell, the salt bridge

87.The rate of the simple reaction 2NO + O₂ → 2NO₂, when the volume of the reaction vessel is doubled,

88. Higher order (> 3) are rare due to,

89.Decomposition of H2O2 follows a first order kinetics. In minutes, the concentration of H2O2 decreases from 0.5 to 0.125 M in one such decomposition. When the concentration of H2O2 reaches 0.05 M, the rate of formation of O2 will be,

90.In a bimolecular reaction, the steric factor P was experimentally determined to be 4.5. The correct option(s) among the following is (are)