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NCERT-THE P-BLOCK ELEMENTS-EXERCISE
- Why does NH3 act as a Lewis base ?
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- Why are pentahalides of P,As,Sb and Bi are more covalent than trihalid...
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- Why is BiH3 the strongest reducing agent amongst all the hydrides of g...
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- Why is N(2) less reactive at room temperature ?
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- Mention the conditions required to maximise the yield of ammonia.
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- How does ammonia react with a solution of Cu^(2+)?
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- What is the covalence of nitrogen in N2O5?
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- Bond angle in PH(4)^(+) is higher than that in PH(3).Why ?
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- What happens when white phosphorus is heated with concentrated NaOH so...
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- What happens when PCl(5) is heated?
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- Write a balanced equation for the reaction of PCl5 in heavy water.
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- What is the basicity of H(3)PO(4) ?
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- What happens when H(3)PO(3) is heated.
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- List the important sources of sulphur.
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- Write the order of thermal stability of the hydrides of group 16 eleme...
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- Why is H(2)O a liquid and H(2)S a gas?
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- Which of the following does not react with oxygen directly? Zn,Ti,Pt,F...
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- Complete the following reactions: (i) C(2) H(4) + O(2) to (ii)...
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- Why does O3 act as a powerful oxidising agent?
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- How is O(3) estimated quantitatively ?
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- What happens when sulphur dioxide is passed through an aqueous solutio...
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