Identify the metal which is nontoxic in nature
1). Chromium
2). Gold
3). Cadmium
4). Cobalt
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1. Which of the following elements has the lowest melting point?
2. Atomic number is the number equal to
4. The inert gas used as beacon light is
6. Which one of the following is known as the brown coal
7. Which of the following is a natural dye ?
8. A pungent smell often present near the urinals is due to
9. Of the following which one pollutes the air of a big city ?