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SUBHASH PUBLICATION-P-BLOCK ELEMENTS-Two mark questions and answers
- C and Si are always tetravalent but Ge, Sn , Pb show divalency . Why ?
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- Which of the following is acidic and why : SiO(2) , AI(2) , PbO(2), Si...
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- As we move down in group 13 elements increase in atomic size is compar...
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- Explain the reaction of borax on heating .
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- Orthoboric acid acts as a Lewis acid . Why ?
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- What is the action of heat on orthoboric acid ?
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- Explain the structure of orthoboric acid .
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- How to prepare diborane in laboratory ?
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- What happens when diborane reacts with air ?
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- How does diborane react with water ?
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- How does ammonia react with diborane ?
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- Write any two uses of boron.
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- Write any two uses of aluminium.
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- Explain ionisation enthalpy of group 14 elements .
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- Explain electronegativity of group 14 elements .
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- Discuss oxidation states in group 14 elements .
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- Mention the anomalous behaviour of carbon.
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- How to prepare carbon monoxide from formic acid ?
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- Explain the reaction of CO(2 on photosynthesis.
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- Give two uses of carbon dioxide .
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