Question : Which of the following metals contribute to biomagnification problem in the ecosystem?
Option 1: Mercury
Option 2: Chromium
Option 3: Copper
Option 4: Lead
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Correct Answer: Mercury
Solution : The correct answer is Mercury.
Biomagnification is the process of accumulation of toxic substances in the body of an organism and it passes and amplifies in the subsequent trophic levels or in a food chain. For an element to biomagnify it has to be fat soluble and it should be long lived. Biomagnification is usually seen in DDT and in metals like Mercury. Mercury pollution causes Minamata disease.
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Question : Which of the following metals has the least melting point?
Option 1: Gold
Option 2: Silver
Option 3: Mercury
Option 4: Copper
Question : A fuse wire is made of
Option 1: An alloy of tin and copper
Option 2: An alloy of tin and lead
Option 3: An alloy of tin and aluminium
Option 4: An alloy of Nickel and Chromium
Question : Cinnabar is an ore/mineral of
Option 1: lead
Option 2: Manganese
Option 3: Molybdenum
Option 4: Mercury
Question : Which of the following statement(s) is/are correct?
Option 1: Oxides of non-metals are basic
Option 2: Oxides of non-metals are acidic
Option 3: Oxides of metals are acidic
Option 4: All options are correct
Question : When Lead nitrate is heated, which of the following gases is produced?
Option 1: Nitrogen oxide
Option 2: Lead dioxide
Option 3: Nitrogen dioxide
Option 4: Lead oxide
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