Which is considered to be "earth's prote...

Which is considered to be "earth's protective umbrella"?

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NCERT TAMIL-P-BLOCK ELEMENTS -QUESTIONS - D. WRITE IN ONE OR TWO SENTENCE

Mention the reasons for the stabilisation of lower oxidation state of ...
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What are the uses of boron trifluoride ?
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Give an example of Microalgae.
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Why diamond is hard compared with graphite?
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Why alkaline earth metals have higher tendency to form complexes than ...
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Boron does not form B^(3+) ion. Why?
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Why NH(3) has high boiling point than PH(3)?
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Which is insoluble in water?
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Which is considered to be "earth's protective umbrella"?
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Mention any 3 uses of ozone.
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What are SNPs? Mention its uses.
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What are compound oxides? Give an example.
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Mention the function of haemoglobin in natural process.
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What happens when Chlorine reacts with slaked lime.
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