Question Paper (Section wise)
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1) If an electron in a hydrogen atoms jumps from the 3 rd orbit to the 2 nd orbit, it emits a photo of wavelength λ. When it jumps from he 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be
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2) A bullet of mass 10 g moving horizontally with a velocity of 400 ms-1 strikes a wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m. As a result, the center of gravity of the block is found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be
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160 ms-1
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100 ms-1
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80 ms-1
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120 ms-1
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3) Three liquids of densities ρ1 ρ 2 and ρ 3 (with ρ 1 > ρ 2 > ρ 3), having the same value of surface T, rise to the same height in three identical capillaries. The angles of contact θ1, θ2 and θ3 obey
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4) An electric dipole is placed at an angle of 30° with an electric field intensity 2 × 105 N/C. it experiences a torque equal to 4 Nm. The charge on the dipole, if the dipole length is 2 cm, is
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4 µ C
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5 mC
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2 mC
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5 mC
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5) The potential difference across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L – C – r circuit. The power factor of this circuit is
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1.0
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0.4
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0.5
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0.8
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1) The solubility of BaSO4 in water is 2.42 × 10-3 gL-1 at 298 K. The value of its solubility product (Ksp) will be (Given molar mass of BaSO4 = 233 g mol-1)
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1.08 × 10-14 mol2L-2
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1.08 × 10-12 mol2L-2
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1.08 × 10-10 mol2L-2
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1.08 × 10-8 mol2L-2
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2) In the structure of CIF3, the number of lone pairs of electrons on central atom ‘CI’ is:
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four
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two
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one
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three
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3) When initial concentration of the reactant is doubled, the half-life period of a zero order reaction:
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is tripled
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is doubled
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is halved
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remains unchanged
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4) Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below:
Then the species undergoing disproportionation is
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Br2
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HBrO
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5) The compound C7H8 undergoes the following reactions:
The product ‘C’ is:
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3-bromo-2, 4, 6-trichlorotoluene
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o-bromotoluene
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m-bromotoluene
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p- bromotoluene
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1) Attractants and rewards are required for:
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Entomophily
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Hydrophily
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Cleistogamy
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Anemophily
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2) Receptor sites for neurotransmitters are present on the
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Pre-synaptic membrane
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Tips of axons
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Post-synaptic membrane
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Membranes of synaptic vesicles
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3) Root hairs develop from the region of:
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Elongation
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Root cap
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Meristematic activity
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Maturation
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4) A disease caused by an autosomal primary non-disjunction is:
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Klinefelter's syndrome
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Turner's syndrome
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Sickle cell anemia
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Down's syndrome
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5) Which of the following components provides sticky character to the bacterial cell?
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Nuclear membrane
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Plasma membrane
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Glycocalyx
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Cell wall
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6) Which of the following options best represents the enzyme composition of pancreatic juice?
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Amylase, pepsin, trypsinogen, maltase
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Peptidase, amylase, pepsin, rennin
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Lipase, amylase, trypsinogen, procarboxypeptidase
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Amylase, peptidase, trypsinogen, rennin
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7) Which statement is wrong for Krebs cycle?
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There is one point in the cycle where FAD+ is reduced to FADH2.
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During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised.
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The cycle starts with the condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
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There are three points in the cycle where NAD+ is reduced to NADH + H+.
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8) Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:
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C4 plants
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C2 plants
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C3 and C4 plants
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C3 plants
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9) Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
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Ribosome
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Chloroplast
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Mitochondrion
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Lysosome
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10) Mycorrhizae are the example of:
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Amensalism
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Antibiosis
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Mutualism
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Fungistasis
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