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In which block element lanthanoid Contra...

In which block element lanthanoid Contraction observe?

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Reason of lanthanoid contraction is-

What do you mean by lanthanoid Contraction?

Classify the following as d-block elements, lanthanoids and actinoids : Nb, Tc, Re, Nd, Pa, Tb, Cf

Actinoid contraction is greater from element to element than lanthanoid contraction. Why ?

Which element of lanthanoid shows +4 oxidation state?

Which is not s-block element ?

The extent of actinoid contraction is more than lanthanoid contraction. Give reason.

Which block element in the perodic table contains natural radioactive element?

UNITED BOOK HOUSE-MODEL QUESTION PAPER 11-EXERCISE
  1. What is accuracy?

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  2. What do you mean by reliability?

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  3. In which block element lanthanoid Contraction observe?

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  4. Give an example of inert pair effect?

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  5. What is the change of free energy in irrevsisible process?

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  6. What is light Oil?

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  7. 1.25 gm of a metal process 62.4 ml H2 at NTP, Calculate the equivalent...

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  8. Give the difference between orbit and orbital.

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  9. What happens when:CuO is heated with B2O3 in (Oxidation flame)

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  10. Fe2O3 is heated with B2O3 in (reducing flame)

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  11. Write the structural formula for the following compound:1, 2, 3 - trim...

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  12. Write the structural formula for the following compound:4 - Chtoro - 2...

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  13. What is stone Cancer.

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  14. Calculate the energy of 1 Millimole of photon having wavelength 405nm

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  15. Calculate the radius of the 3^(rd) orbit in which electron has the vel...

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  16. Arrange the following oxides as per their increasing order of acidic n...

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  17. Arrange the element as per increasing electronegativity O, Te, Se, S. ...

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  18. Why the boiling point of NH3 is higher than that of PH3? Give an examp...

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  19. Why the bond length of BF3 is less than that of BF4? Find the hybridi,...

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  20. Calculate th r.m.s. velocities of CO2 at 27^@C. Show that C(rms) =sqrt...

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