Question Paper (Section wise)
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1) The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance R1 will be
Â
Â
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3.13 A
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2.5 A
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10.0 A
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1.43 A
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2) Two rotating bodies A and B of masses m and 2 m with moments of inertia IA and IB (IB > IA) have equal kinetic energy of rotation. If LA and LB be be their angular momenta respectively, then
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3) One mole of an ideal monatomic gas undergoes a process described by the equation PV3 = constant. The heat capacity of the gas during this process is
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R
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2 R
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4) A filament bulb (500W, 100V) is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W. the value of R is
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13 Ω
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230 Ω
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46 Ω
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26 Ω
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5) 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
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16
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8
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10
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12
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1) Carboxylic acids have higher boiling points than aldehydes, ketones and even alchohols of comparable molecular mass. It is due to their
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more extensive association of carboxylic acid via van der Waals force of attraction
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formation of carboxylate ion
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formation of intramolecular H-bonding
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formation of intermolecular H- bonding
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2) Which one of the following elements is unable to from  ion?
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B
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Al
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Ga
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In
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3) Which one of the following ions exhibits d-d transition and paramagnetism as well?
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4) Which of the following carbocations is expected to be most stable?
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5) Which of the following oxides is most acidic in nature?
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BaO
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BeO
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MgO
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CaO
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1) Asymptote in a logistic growth curve is obtained when:
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k = N
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k > N
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k < N
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The value of r approaches zero
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2) Artificial selection to obtain cows yielding higher milk output represents:
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Directional selection as it pushes the mean of the character in one direction.
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Disruptive selection as it splits the population into two, one yielding higher output and the other lower output.
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Stabilising selection followed by disruptive selection as it stabilises the population to produce higher yielding cows.
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Stabilising selection as it stabilises this character in the population.
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3) Which of the following is made up of dead cells?
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Collenchyma
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Phellem
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Phloem
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Xylem parenchyma
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4) An example of colonial algae is:
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Volvox
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Ulothrix
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Spirogyra
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Chlorella
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5) Which ecosystem has the maximum biomass?
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Grassland ecosystem
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Pond ecosystem
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Lake ecosystem
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Forest ecosystem
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6) Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration because of:
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Inspiratory Reserve Volume
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Tidal Volume
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Expiratory Reserve Volume
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Residual Volume
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7) Hypersecretion of growth hormone in adults does not cause further increase in height, because:
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Epiphyseal plates close after adolescence.
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Bones lose their sensitivity to growth hormone in adults.
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Muscle fibres do not grow in size after birth
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Growth hormone becomes inactive in adults.
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8) DNA replication in bacteria occurs:
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Within nucleolus
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Prior to fission
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Just before transcription
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During S phase
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9) Select the mismatch.
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Cycas - Dioecious
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Salvinia - Heterosporous
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Equisetum - Homosporous
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Pinus - Dioecious
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10) The morphological nature of the edible part of coconut is:
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Cotyledon
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Endosperm
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Pericarp
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Perisperm
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