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10. Generally the number of electrons in the outermost shell, Knowledge and Understanding Based Questions, Multiple Choice Questions, of a metal atom is:, For each question given below, choose the correct alternative., (b) I to 3, (a) 1, 1. The best electrical conductor is:, (b) copper, (c) 4 to 8, (d) none of these, (a) gold, 11. The lightest element in the nature is:, (c) aluminium, (d) silver., (a) hydrogen, (b) helium, 2. Metals have high density. Which one of the following, metals is an exception?, (c) lithium, (d) nitrogen, 12. Strategic metals are the metals which are:, (a) Tungsten, (b) Mercury, (a) costly, (b) non-available, (c) Osmium, (d) Sodium., (c) of no use, (d) essential for economy, 3. Which one of the following metals does not displace, hydrogen from dilute acids?, (a) Magnesium, 13. Which of the following is a strategic metal?, (a) Gold, (b) Silver, (b) Iron, (c) Itanium, (d) Zinc, (c) Copper, (d) Zinc., 14. The non-metal which occurs in liquid state is:, 4. Which of the following cannot displace Ag from AgNO,, solution?, (a) fluorine, (b) chlorine, (c) bromine, (d) iodine, (a) Magnesium, (b) Zinc, 15. Metal which is best conductor of electricity is:, (c) Copper, (d) Gold., (a) copper, (b) aluminium, 5. Identify the least reactive metal amongst the following:, (c) gold, 16. Which of the following metals does not evolve H, from, dilute acids?, (d) silver, (a) copper, (b) lead, (e) silver, (d) aluminium., 6. The metals which can produce amphoteric oxides are:, (a) Zn, (b) Al, (a) Aluminium and Magnesium, (c) Mg, (d) Cu, 17. The property of metals due to which they can be hammered, into thin sheets is called:, (b) Zinc and calcium, (c) Magnesium and strontium, (a) sonorous, (b) ductility, (d) Zinc and Aluminium., (c) malleability, 18. The property of metals duce to which they can be drawn, into thin wires is called:, (d) metallic lustre, 7. Where do the metals, which can displace hydrogen from, water at room temperature, appecar in the reactivity series?, (a) Next to hydrogen, (b) At the bottom, (a) malleability, (b) metallic lustre, (c) In the middle, (d) Near the top., (c) conductivity, (d) ductility, 19. Which of the following oxides is acidic?, 8. The elements whose oxides can turn litmus solution, red are:, (a) sodium and potassium, (a) Sulphur dioxide, (b) Magnesium oxide, (c) Zinc oxide, (d) Sodium oxide, (b) magnesium and carbon, 20. Which metal is stored in kerosene?, (c) sulphur and phosphorus, (a) Sodium, (b) Potassium, (d) aluminium and zinc., 9. Which of the following statements about metals is not, (c) Lithium, (d) All of these, 21. Cinnabar is an ore of:, correct?, (a) manganese, (b) zine, (a) They act as reducing agents., (c) mercury, (d) gold, 22. Which is the most malleable metal?, (b) They are electropositive., (c) They do not give up electrons easily., (a) Gold, (b) Silver, (d) They form basic or amphoteric oxides., (c) Соpper, (d) Aluminium

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Sample Papers, i When iron reacts with steam, then the gas produced is:, 41, 38. Cations are:, (a) 0,, (c) CO,, 4 The metal(s) that can displace Cu from CuSo, solution, (b) H, (d) N2, (a) positively charged ions (b) negatively charged ions, (c) radicals, (d) none of these, 39. Bronze is an alloy of:, is are:, (a) zinc, (b) iron, (a) Pb and Sn, (b) Cu and Zn, (c) magnesium, 15. The metal(s) which can be cut with the help of a knife:, (c) Cu and Sn, 40. Anions are:, (d) all of these, (d) Pb and Sn, (a) sodium, (b) potassium, (a) positively charged ions (b) negatively charged ions, (c) radicals, (c) lead, 26. Which is the least reactive metal?, (d) all of these, (d) atoms with no charge, 41. Which of the following metal has highest melting point?, (a) Silver, (b) Gold, (a) Copper, (b) Silver, (c) Sodium, (e) Сopper, 27. Which of the following is a metalloid ?, (d) Aluminium, (d) Tungsten, 42. An element reacts with oxygen to give a compound with, a high melting point. This compound is soluble in water., The element is likely to be:, (a) Aluminium, (b) Silicon, (c) lodine, (d) Mercury, (a) calcium, (b) carbon, 28. The most reactive metal is :, (c) silicon, (d) iron, (a) sodium, (b) potassium, 43. Which of the following is a characteristic of metals?, (c) lithium, 19. Allotrope of which non-metal is a good conductor of heat, and electricity :, (a) sulphur, (d) platinum, (a) They have one to three valence electrons., (b) They have 4 to 8 valence electrons., (b) phosphorus, (c) They are brittle., (d) They are capable to form anions easily., (c) carbon, (d) iodine, 30. Which of the following is an amphoteric oxide?, 44. When iron filings are heated in a steam of dry hydrogen, chloride, the compound formed in FeCl, where x is:, (a) ZnO, (b) Al,03, (d) (a) and (b) both, (a) 1, (b) 2, (e) Fe,O,, 31. The metal which does not react with O, or H,0 is:, (c) 3, (d) 4, 45. Silver articles become black on prolonged exposure to, air. This is due to the formation of:, (a) Na, (b) Ca, (c) Mg, (d) Au, 32. The type of bond present in NaCl is :, (a) Ag,N, (b) Ag,0, (a) electrovalent, (b) covalent, (c) Ag,S, (d) Ag,S and Ag,N, (c) (a) and (b) both, (d) none of these, 46. The best malleable metal is:, 33, Amalgam is an alloy of a metal with:, (a) alumiaium, (b) silver, (c) gold, 47. Aluminium does not oxidise readily in air because:, (a) mercury, (b) silver, (d) lead, (d) platinum, (c) gold, 34. Brass is an alloy of:, (a) it is high in the electrochemical series, (b) it is low in the electrochemical series, (c) the metal does not combine with oxygen, (a) Cu and Sn, (b) Cu and Zn, (c) Zn and Sn, (d) Pb and Sn, (d) the metal is covered with a layer of oxide which does, not rub off., 35. Which of the following metal is not found in free state?, (a) Gold, (b) Silver, 48. A student mistakenly used a wet gas jar to collect sulphur, dioxide. Which one of the following tests of the gas is, likely to fail?, (c) Sodium, (d) Platinum, 36. The formula of rust is :, (b) Fe,04, (a) Fe,O,, (c) Fe(OH),, 37, The non-metal with metallic lustre is:, (a) Odour, (d) Fe,0,. xH,0, (b) Effect an acidified K,Cr,0, solution, (c) Solubility test, (a) sulphur, (c) bromine, (b) phosphorus, (d) None of these, (d) iodine

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DEEPAK CBSE Sample Papers Science 10th, 49. Metal M reacts with oxgyen to form metallic oxide MO., This oxide reacts with moisture and carbon dioxide of the, atmosphere to form a basic carbonate metal M. The metal, "M' is:, 52. When a metal is added to dilute HCI solution, there is no, evolution of gas. Metal is:, (a) K, (b) Na, (c) Ag, 53. The metal that reacts with cold water is:, (d) Zn, (a) Cu, (b) Fe, (c) Zn, (d) Cr, (a) mercury, (b) sodium, 50. Which of the following is not a characteristics of metal?, (c) zine, (d) tungsten, (a) Malleable, (b) Electro-positive nature, 54. The only metal that is liquid at room temperature is :, (b) sodium, (d) tungsten, (a) mercury, (c) Ductile, (d) None of these, (c) zinc, 51. Pure gold is:, 55. Silicon is used in:, (a) 24 carats, (b) 22 carats, (a) solar energy devices, (c) transistors, (b) semi-conductors, (c) 20 carats, (d) 18 carats, (d) all of these