Download JNU 2020 Environmental Science (Sesm) Registered Photo Exam Day Photo Question Paper

UeFirstranker's choiceve gasses: neon (mono atomic) and oxygen (diatomic). The ratio of their partial pressures is 3: 2. Then the ratio of their Atomic masses is (Molecular mass of O2 = 32.0 u)

1. 3/2 (Correct Answer)
2. 101/160

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3. 303/320
4. 1

Given below are two statements :

Statement 1: Glucagon is a peptide hormone and plays an important role in maintaining the normal blood glucose level.

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Statement II: Glucagon stimulates glycogenolysis resulting in hyperglycemia.

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

1. Both Statement I and Statement II are true. (Correct Answer)
2. Both Statement I and Statement II are false.
3. Statement I is correct, but Statement II is false.

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4. Statement I is incorrect, but Statement II is true.

Given below are two statements :

Statement 1: Haloarenes are less reactive towards nucleophilic substitution reactions compared to haloalkanes.

Statement II: Carbon atom holding halogen atom is sp² hybridized in haloarenes and sp³ hybridized in haloalkanes.

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

1. Both Statement I and Statement II are correct. (Correct Answer)
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct, but Statement II is incorrect.
4. Statement I is incorrect, but Statement II is correct.

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Agar, used in synthetic growth media for microbes, is a product of which one of the following ?

1. Moss
2. Fungi
3. Algae (Correct Answer)

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4. Bacteria

As a macro element, sulphur is a component of which of the following proteins ?

1. Methionine
2. Vitamin B1

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3. Lipoic acid
4. Coenzyme A
5. Carboxylase

Choose the correct answer from the options given below:

1. Carbon alloy

"Atoms are neither created nor destroyed in a chemical reaction" is a statement of the:

1. law of definite proportions
2. law of conservation of mass (Correct Answer)

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3. law of percent composition
4. atomic theory

The pairs of spermathecae are located in which segment of earthworm ?

1. 6th to 9th segments (Correct Answer)

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2. 2nd to 5th segments
3. 15th to 18th segments
4. 10th to 13th segments

Which of the sequence of speed of molecules (as per Maxwell Boltzmann distribution at same temperature) is correct?

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1. Urms
2. Uav
3. Ump

Choose the correct answer from the options given below :

1. C>A> B

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2. C > B > A
3. A>B> C (Correct Answer)
4. A > C > B

Which of the following is not a postulate of Bohr's model for hydrogen atom ?

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1. Electron moves around the nucleus in circular path of fixed radius and energy
2. Angular momentum of an electron is quantized
3. Energy of an electron in the orbit does not change
4. Matter has dual behavior (Correct Answer)

The below question has been dropped and full marks are awarded.

A block of mass 1 kg slides down on an inclined plane forming an angle 45° with the horizontal. If the coefficient of friction between the block and the inclined plane is 0.4, then the acceleration of the block when it starts to slide is:

(take g = 10 m/s² and v2 = 1.414)

1. 0.21 m/s²
2. 2.1 m/s²

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3. 0.49 m/s²
4. 4.9 m/s²

1. Mode < Median < Mean
2. Mode > Mean > Median

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3. Mean > Median > Mode (Correct Answer)
4. Mean > Mode > Median

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Lysosomes function in degrading damaged cellular components.

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Reason R : Lysosomes help in the exocytosis of damaged components.

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

1. Both A and R are correct and R is the correct explanation of A.
2. Both A and R are correct, but R is not the correct explanation of A.
3. A is correct, but R is not correct. (Correct Answer)

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4. A is not correct, but R is correct.

Arrange the following carbocations in decreasing order of stability :

1. CH3-CH2
2. +CH3

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3. (CH3)2 -+CH
4. (CH3)3 - C+

Choose the correct answer from the options given below :

1. D>A> C > B
2. B>A>C>D

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3. B > C >A>D
4. D > C > A > B (Correct Answer)

Consider the equation x³ - 9x² + 23x - 15 = 0.

What would be the roots of the above equation if they are in arithmetic progression?

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1. 1, 2 and 3
2. 2, 4 and 6
3. 1,3 and 5 (Correct Answer)
4. 3, 5 and 7

1. A-III, B - IV, C - I, D - II
2. A-IV, B - III, C - II, D - I (Correct Answer)

A particle of mass 1.0 kg, at a position is accelerating under the influence of a force of . The torque acting on the particle about the origin is :

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1. (Correct Answer)

Which one of the following animals are diploblastic ?

1. Tapeworm
2. Locust

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3. Star fish
4. Sea Anemone (Correct Answer)

What will be the final product of feldspar weathering ?

1. Illite

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2. Kaolinite
3. Gibbsite (Correct Answer)
4. Goethite

If and represent three vectors, then consider the following statements:

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4. If and are parallel, then

Choose the correct answer from the options given below :

1. A and B Only (Correct Answer)
2. B and C Only
3. C and D Only

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4. A and D Only

The boundary between the troposphere and the stratosphere is known as:

1. Tropopause (Correct Answer)
2. Theropause

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3. Thermocline

What is the pressure on a swimmer 10 m below the surface of a lake (take g = 10 m/s², 1 atm = 105 Pa)?

1. 105 Pa
2. 1.01 x 105 Pa

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3. 1.1 x 105 Pa
4. 2 x 105 Pa (Correct Answer)

Given below are two statements:

Statement 1: If u? is a positive term series, and lim = 1, then Su? is convergent if l > 1.

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Statement II: If Su? is a positive term series, and lim = 1, then Su? is divergent if l < 1.

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

1. Both Statement I and Statement II are true.
2. Both Statement I and Statement II are false. (Correct Answer)
3. Statement I is correct, but Statement II is false.

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4. Statement I is incorrect, but Statement II is true.

Given below are two statements :

Statement1: The electric field inside a thin spherical charged conducting shell is zero.

Statement II : The electric potential inside a thin spherical charged conducting shell is constant.

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

1. Both Statement I and Statement II are true. (Correct Answer)
2. Both Statement I and Statement II are false.
3. Statement I is correct, but Statement II is false.
4. Statement I is incorrect, but Statement II is true.

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Which of the following product will be formed from the reaction of benzene with CH3Cl in the presence of aluminum chloride ?

1. Toluene (Correct Answer)
2. Chloro toluene
3. 4-ethyl toluene

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4. 4-chloro toluene

What is the type of volcanic rock formed at mid oceanic ridges ?

1. Andesite
2. Basalt (Correct Answer)

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3. Rhyolite
4. Granite

1. Both A and R are true, but R is not the correct explanation of A.
2. A is true, but R is false.

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3. A is false, but R is true.

Moon completes one revolution around the earth in 27.3 days. Assuming that the orbit is circular and has radius of 3,85,000 km, the magnitude of the acceleration of the moon towards earth would be

1. 2.72 x 10?³ m/s² (Correct Answer)
2. 27.2 x 10?³ m/s²

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3. 272 m/s²
4. 7.22 x 10?³ m/s²

Conglobate gland is present in which of the following invertebrates ?

1. Frog

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2. Snake
3. Cockroach (Correct Answer)
4. Butterfly

The average amount of dissolved salt in seawater is approximately :

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1. 35%
2. 3.5% (Correct Answer)
3. 25%
4. 2.5%

Mature quartz arenite characterizes :

1. Continental rift valley
2. Fore arc basin
3. Passive continental margin (Correct Answer)
4. Convergent plate boundary

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Given below are two statements :

Statement 1: As the ecosystem develops through different stages of succession, niche specialization becomes narrower.

Statement II : As the ecosystem develops through different stages of succession, internal symbiotic relationships get diminished.

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

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1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct, but Statement II is incorrect. (Correct Answer)
4. Statement I is incorrect, but Statement II is correct.

In case of C4 plants, the first acceptor of carbon-di-oxide for Hatch and Stack cycle is :

1. Phosphoenol pyruvic acid (Correct Answer)

Light of wavelength 5000 Å is coming from a star. The limit of resolution of a telescope whose objective has a diameter of 250 cm is:

1. 1.22 x 10?7 rad

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2. 2.44 x 10?7 rad (Correct Answer)
3. 1.22 x 10?6 rad
4. 2.44 x 10?6 rad

A ball is thrown at a speed of 30 m/s in a direction 308 above the horizontal. What is the maximum height that the ball will achieve ?

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1. 1.53 m
2. 11.48 m (Correct Answer)
3. 9.71 m
4. 8.45 m

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: At same temperature, nitrogen gas molecules move faster than chlorine gas molecules.

Reason R : Speed of gas molecules depends on temperature and mass of gas molecules.

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

1. Both A and R are true and R is the correct explanation of A. (Correct Answer)

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2. Both A and R are true but R is not the correct explanation of A.
3. A is true, but R is false.
4. A is false, but R is true.

Which one of the following is not associated with felsic volcanism ?

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1. Strato volcano
2. Pyroclastic ejections
3. Highly viscous lava
4. Pahoehoe lava flow (Correct Answer)

Given below are two statements :

Statement 1: Lassaigne's test is applied to detect N, S and halogens in organic compounds.

Statement II : Carbon and Hydrogen cannot be detected by heating organic compounds with copper (II) oxide.

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

1. Both Statement I and Statement II are correct.

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2. Both Statement I and Statement II are incorrect.
3. Statement I is correct, but Statement II is incorrect. (Correct Answer)
4. Statement I is incorrect, but Statement II is correct.

method of inducing early lowering in plants by pretreatment of their seeds at very low temperature is

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1. Photoperiodism
2. Vernalisation (Correct Answer)
3. Germination
4. Florigens

Polymorphs of quartz indicative of a high pressure origin found in meteorite craters and in high pressure origin assemblages are:

1. Coesite
2. Chert
3. Stishovite
4. Tridymite

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5. Cristobalite

Choose the correct answer from the options given below :

1. A and B Only
2. A and C Only (Correct Answer)
3. B and C Only

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4. D and E Only

Given below are two statements :

Statement 1: Quantum yield is defined as the number of oxygen molecules released per light quanta absorbed.

Statement II : Eight quanta of light energy is required for the reduction of one molecule of CO2 to carbohydrate.

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

1. Both Statement I and Statement II are true. (Correct Answer)
2. Both Statement I and Statement II are false.
3. Statement I is correct, but Statement II is false.
4. Statement I is incorrect, but Statement II is true.

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The proliferation of parenchymatous cells is accompanied by an enlargement of vacuoles of mature cells and a considerable reduction in the size of intercellular spaces is termed as:

1. Aging
2. Senescence
3. Proliferation

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4. Succulence (Correct Answer)

1. A - IV, B - III, C - II, D - I

A passenger sitting by the window of a train moving with a velocity 60 km/h sees for 10 s, a train moving with a velocity of 30 km/h in the opposite direction. The length of the second train is :

1. 200 m
2. 225 m
3. 250 m (Correct Answer)
4. 300 m

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lim is equal to :

1. 0
2. 1 (Correct Answer)
3. 2

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4. 8

Three resistors each of value 1 O are connected end to end to form a triangular shaped network ABC. What is the equivalent resistance between the terminals A and B ?

1. 1/2 O
2. 2/3 O (Correct Answer)

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3. 1 O
4. 4/3 O

Which among the following is a chemolithoautotroph ?

1. Anabaena

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2. Oryza sativa
3. Saccharomyces cerevisiae
4. Beggiatoa (Correct Answer)

What kind of laboratory facility will be needed to work with anthrax pathogen?

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1. Routine microbiology laboratory
2. Laboratory complying to BSL-1 levels
3. Laboratory complying to BSL-2 levels
4. Laboratory complying to BSL-3 levels (Correct Answer)

Consider the following statements regarding the eccentricity of parabola, ellipse and hyperbola :

1. Eccentricity of a parabola is less than 1.
2. Eccentricity of a hyperbola is greater than 1.
3. Eccentricity of an ellipse is less than 1.
4. Eccentricity of a parabola is greater than 1.

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Choose the correct answer from the options given below :

Feldspatheid mineral having composition of NaAlSiO4 (Correct Answer)

1. Feldspathsid mineral having composition

Over which part of the Earth, ozone hole was first discovered ?

1. Equator
2. Tropic
3. Arctic
4. Antarctic (Correct Answer)

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If [A] = then which of the following will correctly represent the value of |A| ?

1. 0
2. 1
3. aß?

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4. (a - ß) (ß - ?) (? - a) (Correct Answer)

AT is the transpose of matrix A and BT is the transpose of matrix B. Now consider the following statements :

1. Matrix B is symmetric if it is a square matrix and BT = -B
2. Matrix A is skew-symmetric if it is a square matrix and AT = A

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3. (AT)T = A
4. (AB)T = BTAT

Choose the correct answer from the options given below :

1. A and B Only
2. B and C Only

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3. C and D Only (Correct Answer)
4. A and C Only

Which of the following landforms are made by the action of underground water?

1. Kettle

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2. Uvala
3. Ventifacts
4. Karst valley
5. Wadis

Choose the correct answer from the options given below :

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1. A and B Only
2. B and D Only (Correct Answer)
3. B and C Only
4. A and E Only

The ratio of the number of turns in the primary to secondary coil of a step down transformer is 10: 1. A load of 50 W connected to the secondary coil draws a current of 1 A. Then the voltage applied to the primary coil is :

140 V (Correct Answer)

Given below are two statements :

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Statement 1: Optical isomerism is the most subtle of five forms of isomerism as the physical and chemical properties of optical isomers are identical.

Statement II : Optical isomers cannot be distinguished using a Polarimeter.

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

1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.

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3. Statement I is correct, but Statement II is incorrect. (Correct Answer)
4. Statement I is incorrect, but Statement II is correct.

Which among the following experimental setups is used to keep a continuous culture of microorganisms in a steady-state over long period of time ?

1. Batch Culture

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2. Chemostat (Correct Answer)
3. Hybridization Oven
4. Orbital Shaker

Consider the following statements :

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1. Standard deviation is independent of change of origin.
2. Standard deviation is independent of change of scale.
3. Correlation coefficient is independent of change of origin.
4. Correlation coefficient is affected by change of scale.

Choose the correct answer from the options given below :

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1. A and B Only
2. A and C Only (Correct Answer)
3. A and D Only
4. B and D Only

Salt is spread on icy roads because it :

1. lowers the freezing point of water (Correct Answer)
2. raises the freezing point of water
3. does not affect the freezing point of water
4. increases friction and boiling point of water

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A facultative anaerobic microorganism is introduced to an environment containing oxygen. What will happen to the microorganism ?

1. It will die.
2. It will survive.
3. It will reproduce and grow.

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4. It will become dormant till favorable conditions

1. A. Electric field inside the surface and on it is
2. B. The electric field inside the surface is necessarily uniform.
3. C. The number of flux lines entering the surface must be equal to the flux lines leaving it.

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4. D. All charges must necessarily be outside the surface.
5. E. The net charge inside the surface must be zero.

Choose the correct answer from the options given below :

1. A and C Only
2. C and D Only

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3. B and E Only
4. C and E Only (Correct Answer)

A block of mass 1.0 kg is fastened to a spring of spring constant 50 N/m. The block is pulled to a distance of 10 cm from its equilibrium position on horizontal frictionless surface and allowed to oscillate. The total energy of the block when it is 5 cm away from its mean position is :

1. 0.0625 J

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2. 0.1250 J
3. 0.1875 J
4. 0.2500 J (Correct Answer)