General Studies  Chemistry

41. Identify the last element accepted by IUPAC

copper chromium cobalt Copernicium
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42. Which of the following element present in sun and star

Hydrogen Lithium Helium Both a and c
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43. Identify the Lightest metal

Sodium Lithium Hydrogen None
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44. The second most abundance of element of the earth crust and also used in computer as chip

Iron Aluminium Silicon Silver
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45. Coin metal

Silver Copper Gold All
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46. Which is used in spring and anchor

Wrought iron Steel Pig iron All
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47. Which metal do not react with alkali

Iron Silver Sodium Magnesium
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48. Order of reactivity of metal with water

Na Na>Ca>Mg Ca>Na MgNa
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49. Purity of gold in 22 carrot

100% 95% 91.6% 75%
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50. Which of the following is a King of metal

Aluminium Iron Copper Sodium
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