Please select a subject first
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State whether true or false. If false, correct the statement.
Newlands’ periodic table is based on atomic masses of elements and modern periodic table is based on atomic number of elements.
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State modern periodic law.
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Covalent bond is formed by ______
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Give the significance of pH of soil in agriculture.
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Write any four uses of bases.
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A phenomenon in which an element exists in different modification in same physical state is called ______.
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Carbon forms large number of organic compounds due to ______.
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______ is a suitable solven for sulphur.
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Differentiate graphite and diamond
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Define Allotrophy
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The antibiotic Penicillin is obtained from ______.
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______ tissues provide mechanical support to organs.
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State whether true or false. If false, correct the statement.
Parenchyma is a simple tissue.
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State whether true or false. If false, correct the statement.
Lack of adequate fats in diet may result in low body weight
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The atmospheric carbon dioxide enters into the plants through the process of ______.
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Poorly developed root is an adaptation of mesophytes.
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Earthworms use the remarkable high-frequency system called echoes.
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Diptheria affects the ______.
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Why streamlined bodies and presence of setae is considered as adaptations of earthworm?
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What is adaptation?
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