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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 1-EXERCISE
  1. From 400 mg of C02, 10^21 molecules are removed.. How many moles of C0...

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  2. 2.49 xx 10^-18 g of an element. A contains 2.0 xx 10^4 atoms. What is,...

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  3. In which block element lanthanoid Contraction observe?

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  4. Name the element having highest electron affinity.

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  5. Which type of property internal energy is?

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  6. Baeyer's reagent is -

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  7. A compound composed of carbon,hydrogen and chlorine contains C = 10.04...

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  8. State Paulils exclusion principle. Give an example of an ion which obe...

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  9. Explain, why 3f orbital does not exist. Far how many electrons of Cl-a...

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  10. Suggest reasons why the B-F bond length in BF3 (130 Pm) and BF4^- (143...

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  11. How will you convert a mixture of CO and CO2 completely into CO ?

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  12. How will you convert a mixture of CO and CO2 completely into CO ?

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  13. (CH3)3C-Cl, is unreactive, towards SN^2 reaction.Why?

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  14. Write one effect of depletion of ozone layer and one measure for the p...

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  15. Give the electronic configuration of 24Cr^(3+). Find the .number of un...

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  16. Why ionisation enthalpy of nitrogen is greater than that of oxygen ato...

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  17. Which one of the following elements has the least electron affinity? B...

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  18. Which one is more basic and why-mGo & Al(2)O(3)?

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  19. The general electronic configuration of d-block elements is

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  20. According to VSEPR theory explain the shape of ClF3.

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