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# Multiple Choice Questions **17. Identify the metal that is used in making jewelry:** a) Silver b) Iron c) Aluminum d) Cobalt **Correct Answer:** a) Silver **18. An alloy of iron, carbon, silicon, and manganese is:** a) Cast iron b) Cast copper c) Cast Aluminum d) Silicon **Correct Answer:**...

# Multiple Choice Questions **17. Identify the metal that is used in making jewelry:** a) Silver b) Iron c) Aluminum d) Cobalt **Correct Answer:** a) Silver **18. An alloy of iron, carbon, silicon, and manganese is:** a) Cast iron b) Cast copper c) Cast Aluminum d) Silicon **Correct Answer:** a) Cast iron **19. Mercury is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ at room temperature:** a) solid b) liquid c) gas d) plasma **Correct Answer:** b) liquid **20. Melting point of tungsten is:** a) 3421°C b) 3422°C c) 3423°C d) 3424°C **Correct Answer:** b) 3422°C **21. No. of valence electrons in Oxygen:** a) 5 b) 6 c) 7 d) 8 **Correct Answer:** b) 6