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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
- Write the names and symbols of the group 15(VA) elements.
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- Write the electronic configuration of group 15 elements
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- The maximum number of covalent bonds formed by nitrogen is 4.
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- Why the elements of the second row (first short period)? exhibit a nu...
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- Which of the following is/are not known? (i) PCl3 , AsCl3 , SbCl3 ,...
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- Write chemical equation for thermal decomposition of ammonium dichroma...
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- Account for the fact that ammonia is a good complexing agent.
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- Why is phosphoric acid syrupy?
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- Name two oxoacids of nitrogen and write the oxidation state of nitroge...
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- What is the difference between the nature of pi-bonds present in H3PO3...
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- Name three allotropes of phosphorus. Which out of these is most reacti...
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- Why is white phosphorus stored under water?
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- How is pyrophosphoric acid related to orthophosphoric acid?
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- Give reasons for the following : (i) Nitric oxide become brown on ex...
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- Give reasons for the following : NO2 is considered a mixed anhydride.
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- What is the basicity of phosphorus acid ?
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- Name the series of salts that are formed by orthophosphoric acid with ...
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- What is the state of hybridization of nitrogen in NO3^(-) ion ?
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- NO2 readily forms a dimer. Explain.
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- What is laughing gas ? How is it prepared?
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