Question Paper (Section wise)
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1) A square loop ABCD carrying a current i, is placed near and coplanar with a long straight conductor XY, carrying a current I, the net force on the loop will be:
Â
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2) A refrigerator works between 4°C and 30°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is: (Take 1 cal = 4.2 Joules).
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2.365 W
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23.65W
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236.5W
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2365W
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3) An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is:
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4) When a metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is . The threshold wavelength for the metallic surface is:
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5) Given the value of Rydberg constant is 107 m–1 the wave number of the last line of the Balmer series in hydrogen spectrum will be:
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0.025 × 104 m–1
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0.5 × 107 m–1
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0.25 × 107 m–1
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2.5 × 107 m–1
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1) Iron exhibits bcc structure at room temperature. Above 900° C, it transforms to fcc structure. The ratio for density of iron at room temperature to that at 900° C (assuming molar mass and atomic radii of iron remains constant with temperature) is
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2) For the redox reaction
the correct coefficients of the reactants for the balanced equation are:
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3) Iron carbonyl. Fe (CO)5 is
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trinuclear
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mononuclear
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tetranuclear
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dinuclear
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4) Which of the following compounds can from a zwitter ion?
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Benzoic acid
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Acetanilide
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Aniline
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Glycine
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5) The difference between amylose and amylopectin is:
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Amylopectin have 1 → 4 α linkage and 1 → 6 β-linkage
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Amylose have 1 → 4 α- linkage and 1 → 6 β-linkage
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Amylopectin have 1 → 4 α- linkage and 1 → 6 α -linkage
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Amylose is made up of glucose and galactose
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1) A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using
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Ligase
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EcoRI
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Taq polymerase
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Polymerase III
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2) Which of the following is not a component of downstream processing?
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Expression
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Separation
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Purification
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Preservation
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3) Radial symmetry is found in the flowers of
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Cassia
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Brassica
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Trifolium
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Pisum
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4) Free-central placentation is found in
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Citrus
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Dianthus
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Argemone
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Brassica
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5) In majority of angiosperms
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A small central cell is present in the embryo sac.
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Egg has a filiform apparatus.
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There are numerous antipodal cells.
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Reduction division occurs in the megaspore mother cells.
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6) Pollination in water hyacinth and water lily is brought about by the agency of
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Bats
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Water
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Insects or wind
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Birds
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7) A lake which is rich in organic waste may result in
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Mortality of fish due to lack of oxygen
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Increased population of aquatic organisms due to minerals
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Drying of the lake due to algal bloom
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Increased population of fish due to lots of nutrients
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8) The highest DDT concentration in aquatic food chain shall occur in
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Eel
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Phytoplankton
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Seagull
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Crab
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9) Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.
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Thrombocytes
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Erythrocytes
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Leucocytes
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Neutrophils
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10) Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation.
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Gastrin
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Insulin
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Glucagon
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Secretin
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