Question : Which of the following is a non-metal that can exist in different forms?
Option 1: Mercury
Option 2: Carbon
Option 3: Lithium
Option 4: Potassium
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Correct Answer: Carbon
Solution : The correct answer is Carbon.
Carbon is a non-metal that can exist in different forms and it is called an allotrope. Carbon is a chemical element with atomic number 6 and is represented by the symbol C. Graphite, Diamond, and Fullerene are the 3 common forms of carbon. Diamond has a very high melting and boiling point, and it is the hardest substance.
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Question : Which among the following is not an alkali metal and does not belong to group 1 of the periodic table?
Option 1: Calcium
Option 2: Lithium
Option 3: Sodium
Question : The toxic metal associated with the Minamata disease is:
Option 1: lead
Option 2: cadmium
Option 3: arsenic
Option 4: mercury
Question : Which among the following planets rotates in a direction opposite to that of the others?
Option 1: Jupiter
Option 2: Saturn
Option 3: Mercury
Option 4: Venus
Question : Which of the following metals is always a component in an amalgam?
Option 1: Strontium
Option 2: Mercury
Option 3: Zinc
Option 4: Aluminium
Question : Which one out of the following helps in burning?
Option 1: Oxygen
Option 2: Carbon monoxide
Option 3: Nitrogen
Option 4: Carbon dioxide
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