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wavelength of transition from (4 rarr 2)...

wavelength of transition from `(4 rarr 2)` in `He^+` is equal as wavelength of transition from `(nrarr 4)` in `Be^3+` then value of n is

A

5

B

6

C

7

D

8

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AAKASH INSTITUTE ENGLISH-TEST 7-Exercise
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  2. For a sample of n mole of a perfect gas at constant temperature T (K) ...

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  3. Which one of the following pairs of solution is not an acidic buffer?

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  4. The number of atom in 8g of CH4 is approx:

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  5. Standard oxidation potential for the following half-cell reactions are...

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  6. The most acidic compound among the following is

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  7. Which one of the following is present as an active ingredient in bleac...

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  8. is Graphite isostructural with diamond?

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  9. General formula unit of cyclic silicates is

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  10. Define following: (i) Micelle

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  11. The number of atom in 16g of CH4 is approx:

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  12. The least stable conformation of n-butane is

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  13. Weight of CO required to react with [5 g Re2O7] to form [Re2 (CO)10], ...

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  14. wavelength of transition from (4 rarr 2) in He^+ is equal as wavelengt...

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  15. If lattice energy of solid XY is 700 kcal/mol then enthalpy of solutio...

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  16. In the Carius method of estimation of halogen. 0.25 g of an organic co...

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  17. The number of atom in 1.6g of CH4 is approx:

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  18. Blue-baby syndrome is due to

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  19. The number of atom in 3.2g of CH4 is approx:

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  20. How many moles of Helium gas occupy 22.4L at 0C and 1atm pressure

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