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Ingestion of heavy metals can cause disease:

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Ingestion of heavy toxic metals (Pd, Hg, Cr, As, Sb etc) have safe limit:

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Heavy metals are dangerous as:

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Which is the most toxic among the givens?

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Which is least toxic among the givens?

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Which one is more toxic?

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The wastes released as a by product during manufacturing of some chemicals are called:

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Cause of infection to man are:

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Chemicals used to kill fungi are:

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Chemicals used to kill herbs are:

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Chemicals used to kill pests are:

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Chemicals used to kill insects are:

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The most important pesticides are:

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Synthetic organic pesticides formulated nowadays are more than:

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Which does mobilize the bond toxic heavy metals ions as Pb, Cd, Hg from sediments into water:

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Many petroleum products are:

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Petroleum or crude oil is a complex mixture of compoundds mainly:

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Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

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A single chloride free radical of CFCs can destroy upto ozone molecules:

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Chlorofluorocarbons and aerosols are inert in sphere:

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Troposphere extends upto km:

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Ozone is stratosphere extends upto km:

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Term ozone hole is used for depletion of ozone during months of:

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By the mid of 1980s depletion of total overhead ozone in antarctic region is:

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Ozone acts as:

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