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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Q. The gas which is slightly soluble in water is

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Q. The compounds formed by group IV elements and chlorine are called

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Q. All group IV elements form a compound with

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Q. Oxides formed by group IV have an oxidation state

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Q. Group-IV oxides are stable to

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Q. All tetrachlorides are hydrolyzed by water except

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Q. Tetrachlorides (-Cl₄) are

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Q. On heating, lead(II) oxide (PbO) will produce

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Q. The carbonates and nitrates of group II elements decompose upon

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Q. Down the group II, thermal decomposition gradually

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Q. The brown gas which is found on heating group Ii nitrate is toxic

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Q. Nitrates (-NO₃) of Group-II down the group require for their decomposition, is high in

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Q. The temperature at which thermal decomposition of metal carbonates of Group II takes place

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