Q. Primary alcohol is gently heated to produce aldehyde in presence of solution of acidified

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Q. Diamond form of Carbon does not conduct electricity due to the absence of

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Q. A very small amount of electrical conductivity is measured in

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Q. Elements with giant molecular structures and strong covalent bonds include

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Q. Tin and lead have same metallic structure at

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Q. In Group-IV, melting point decreases

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Q. Under standard conditions common metallic form of tin is

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Q. Acidic foods are mostly preserved with the help of a solution made from

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Q. Sulfur compounds are present as impurities in

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Q. Acid rain falls in streams, rivers, lakes and makes them

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Q. Chemists have produced low sulfur version of petrol and diesel to reduce the emission of

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Q. Sulfur dioxide is added to foods to stop

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Q. Acid rain has effects on

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Q. The waxy layer of plants are attacked which increases water loss hence making it prone to pest and bacteria which is due to

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Q. Processed foods, pickles, syrups and fruit juices are stored in

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Q. The optimum pH value for action of sulfur dioxide (SO₂) resistance of microbe growth, is less than

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Q. Growth of bacteria and fungi is sometimes inhibited by

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Q. Sulfur dioxide (SO₂) is obtained on burning of

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Q. Iron (Fe) metal in the form of steel (mixture of iron and carbon) can even be corroded by

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Q. Oxides of group IV behave as

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