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Question: The least reactive element in group 17 is ___________. 1. fluorine 2. chlorine 3. bromine 4. iodine Answer: ..

Question 16

Question: Avogadro number represents the number of atoms in ________. 1. 12 grams of 12 C 2. 320 grams of sulphur 3. 32 grams of oxygen 4. 1 gram of 12 C Answer: ..

Question 16

Question: The physical quantity, which is equal to change in momentum, is 1. force 2. impulse 3. acceleration 4. velocity Answer: ..

Question 16

Question: The weight of an object of mass 10 kg on earth is_______. 1. 9.8 N 2. 9.8 kg 3. 98 N 4. 98 kg Answer: ..

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Question: The process used to separate a mixture of ammonium chloride and iodine is ______. 1. sublimation 2. magnetic separation 3. solvent extraction 4. chromatography Answer: ..

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Question: Name the physical quantity which we get from a S-t graph. 1. Speed 2. Displacement 3. Distance 4. Time Answer: ..

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Question: The time period of a vibrating body is 0.05 s. The frequency of waves it emits is 1. 5 Hz 2. 20 Hz 3. 200 Hz 4. 2 Hz Answer: ..

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Question: Which of the following tissues is composed of mainly dead cells? 1. Phloem 2. Epidermis 3. Xylem 4. Endodermis Answer: ..

Question 16

Question: The hormone secreted by the alpha cells of islets of Langerhans is _____________. 1. glucagon 2. insulin 3. adrenaline 4. thymosin Answer: ..

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Question: __________ was a predecessor of Darwin's and developed the theory of acquired characteristics. 1. Weismann 2. Mendel 3. Malthus 4. Lamarck Answer: ..

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