February 2023 UGC-NET Solved Question Paper (Forensic Science)

76. The sequence of molecular weight of primary explosive is:

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77. Arrange the following liquids in increasing order of its density.

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78. Normal sequence (minimal to severe) of fire progression is:

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79. The sequence of vapour pressure at 20°C of components of gasoline is:

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80. Arrange the following, on the basis of characteristics around the entry wound, in sequence for determining the range of firing.

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81. Arrange the following liquids in decreasing order of their refractive index.

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82. The chronological order of various fingerprint classification is:

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83. The sequence of coefficient of friction on automobile tyre is:

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84. The sequence (from neck towards head) of parts of supralaryngeal vocal tract (SLVT) is:

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85. Choose the correct sequence, out of the following, with respect to age changes in the surface bone of sternal rib ends of humans from 19 to 70 years.

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86. Given below are two statements—One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Harison and Gilroy’s test is not popular.

Reason (R): Because it gives unstable colours, the three elements interfere with one another and the results are not quantified.

In the light of the above statements, Choose the most appropriate answer from the options given below:

87. Given below are two statements— One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): The principle behind ion mobility spectrometry, the technology involved for portable instruments for the detection of explosives or illicit drugs, is based on separation of ions through a drift tube using a gas phase.

Reason (R): In this technique the sample is initially ionized forming a negative ion and accelerated by an electric field into the drift tube through a Shuter. As the ion exit the drift tube, they are counted electronically by a Faraday cup.

In the light of the above statements, Choose the most appropriate answer from the options given below:

88. Given below are two statements— One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Luminol or 3-aminophthalhydrazide, luminesce after oxidation in acid or alkaline solution.

Reason (R): Various oxidizing agents could cause the luminescence in acidic solution and positive results are observed with old as well as fresh blood stains.

In the light of the above statements, Choose the most appropriate answer from the options given below:

89. Given below are two statements— One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): The range, the impact of wound and the reliability of improvised firearms vary so much that no generalization of their effects can be safely made.

Reason (R): No two improvised firearms, firing ammunition of the same make and batch, will give similar results.

In the light of the above statements, Choose the most appropriate answer from the options given below:

90. Given below are two statements:

Statement I: Factors like moisture, UV light, high temperature, facilitate the nonenzymatic hydrolysis of RNA phosphodiesters, leading to degradation of RNA.

Statement II: Endogenous ribonucleases (RNAses), present within cells, represent the major factor causing RNA degradation.

In the light of the above statements, Choose the correct answer from the options given below:

Directions (Qs. No. 91-95): Read the following passage carefully and answer the questions that follow:

A female reported the Sub-Divisional Magistrate of her locality, that her husband had attempted to murder her by strangulation. On examination, bruise like marks were noticed on both sides of the front of the neck. The skin around these marks was inflamed and covered with tiny blisters. Similar marks were noticed on her palms and tips of the fingers. On further examination, these marks were found to have ben caused by the application of the juice of marking nut.

91. Taken in larger doses, Marking Nut produces:

Choose the most appropriate answer from the options given below:

92. Marking Nut belongs to which of these categories:

93. Who is authorized to register her complaint (FIR)?

94. The juice of marking nut causes death if applied to:

95. Marking Nut could have ben procured from:

Directions (Qs. No. 96-100): Read the following passage carefully and answer the questions that follow:

A chromatographer was given a mixture containing 4 analytes namely W, X, Y, Z to be separated using High Performance Liquid Chromatography (HPLC). The HPLC was an isocratic system, a C-18 column (C-18. 250 mm × 5 mm) and has UV detector. The chromatographic data obtained is given as under:

Analyte	Retention Time (min)	Width of Peak at base (mm)
non-retained	3.1	—
W	5.4	0.41
X	13.3	1.07
Y	14.1	1.16
Z	21.6	1.72

96. From the obtained chromatographic data, calculate the retention factor for the analyte ‘W’?

97. What is the difference between the retention factor of analyte X and analyte Y?

98. As a chromatographer, to decrease the retention time of analyte Z without altering the retention time of other compounds what modification in the developed method should be proposed.

99. Looking at the chromatographic data, which range describe correctly the resolution of X and Y.

100. From the obtained chromatographic data which one of the following correctly describe the analyte Z in comparison to analyte W.