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First ionisation enthalpies of group-15 ...

First ionisation enthalpies of group-15 elements are, in general , greater than those of group-16 elements-explain.

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The first ionisation enthalpies (Delta_iH_1) of group-13 elements are lower than those of elements of group 2-Explain.

Explain why the first ionisation enthalpies of 5d elements are much higher as compared to those of 3d and 4d elements.

Give reason : First ionisation enthalpies of 5d elements are higher than those of 3d and 4d elements.

Explain why the ionisation ethalpies of the elements of group - 15 are much higher than those of group - 14.

Which group - 15 elements is radioctive ?

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The pentahalides of group -15 elements are thermally less stable than the correponding trihalides - why ?

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CHHAYA PUBLICATION-PREVIOUS YEARS QUESTION PAPER 2016-NEET 2016 (PHASE-II)
  1. First ionisation enthalpies of group-15 elements are, in general , gre...

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  2. A nitrogen -containing aromatic compound A reacts with Sn/HCl, followe...

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  3. Consider the reaction CH(3)CH(2)CH(2)Br+ NaCN to CH(3)CH(2)CH(2)CN +...

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  4. The molar conductivity of a 0.5 mol//dm^(3) solution of AgNO(3) with e...

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  5. The decomposition of phosphine (PH3) an tungsten at low pressure is a ...

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  6. The coagulation values in millimoles per litre of the electrolytes use...

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  7. During the electrolysis of molten sodium chloride, the time required t...

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  8. The van't Hoff factor (i) for a dilute aqueous solution of the strong ...

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  9. In calcium flouride, having the flourite structure, the coordination n...

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  10. If the E("cell")^(0) for a given reaction has a negative value, which ...

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  11. Which one of the following is incorrect for ideal solution ?

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  12. AIF(3) is soluble in HF only in presence of KF: It is due to the forma...

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  13. Zinc can be coated on iron to produce galvanised iron but the reverse ...

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  14. Hot concentrated sulphuric acid is a moderately strong oxidizing agent...

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  15. The correct geometry and hybridization for XeF(4) are-

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  16. The correct increasing order of trans-effect of the following species ...

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  17. Which one of the following statements related to lanthanons is incorre...

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  18. Which of the following can be used as the halide component for Friedel...

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  19. Jahn-Teller effect is not observed in high spin complexes of -

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  20. Which one of the following structures represents nylon 6,6 polymer ?

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  21. Which one of the following nitro-compounds does not react with nitrous...

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