76.Which among the following is in liquid state at normal room - TopicsExpress

76.Which among the following is in liquid state at normal room temperature? A. Sodium B. Mercury C. Copper D. Phosphorous 77.The chemical name of quartz is A. Sodium silicate B. Sodium phosphate C. Calicum phosphate D. Calcium oxide 78.What is the most common element in theuniverse? A. Iron B. Oxygen C. Helium D. Hydrogen 79.Who was the father of chemistry? A. Robert Boyle B. Cavendish C. Lister D. Urey 80.Which one of the following is a protein fibre? A. Nylon B. Silk C. Polyester D. Cotton

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