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a) An orbital can hold only two electron...

a) An orbital can hold only two electrons
b) An orbital must have electrons with opposite spins. Which is correct ?

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. Among N^(-3), O^(-2), F^(-), Na^(+), Mg^(+2) and Al^(+3) (a) What is...

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  2. The number of unpaired electrons in the valance shell of silicon is

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  3. a) An orbital can hold only two electrons b) An orbital must have e...

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  4. Which of the following electronic configuration corresponds to an iner...

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  5. The rule that explain the reason for chromium to have [Ar]3d^(5)4s^(1)...

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  6. Which of the following configuration is not possible ?

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  7. Which of the following ions is not isoelectronic with O^(2-)

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  8. Number of valence electrons in carbon is

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  9. The number of unpaired electrons in Fe^(3+) ion are

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  10. The number of unpaired electrons in 1s^(2) 2s^(2) 2p^(3) is

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  11. Bohr's basic idea of discrete energy levels in atorns and the of Photo...

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  12. The number of d-electrons retained in Fe^(3+) (At. No. of Fe = 26) ion...

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  13. Which of the following is the correct electronic configuration of Fe^(...

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  14. The configuration of chromium atom in ground state is

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  15. The number of unpaired electrons in 1s^(2)2s^(2)2p^(3) is

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  16. Number of unpaired electrons in the electronic configuration 1s^(2)2^(...

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  17. Which of the following is not a fundamental particle ?

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  18. A neutral atom (At.no. gt 1) has

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  19. The study of discharge of electricity through gases led to the discove...

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  20. Electron is a particle having a

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