WB JEE 2018 | Atomic Structure Question 14 | Chemistry

WB JEE 2018

MCQ (Single Correct Answer)

-0.33

The number of unpaired electrons in Ni (atomic number = 28) are

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

If the given four electronic configurations.

(i) n = 4, l = 1

(ii) n = 4, l = 0

(iii) n = 3, l = 2

(iv) n = 3, l = 1

are arranged in order of increasing energy, then the order will be

(iv) < (ii) < (iii) < (i)

(ii) < (iv) < (i) < (iii)

(i) < (iii) < (ii) < (iv)

(iii) < (i) < (iv) < (ii)

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Which of the following sets of quantum numbers represents the 19^th electron of Cr(Z = 24) ?

$$\left( {4,1, - 1, + {1 \over 2}} \right)$$

$$\left( {4,0,0, + {1 \over 2}} \right)$$

$$\left( {3,2,0, - {1 \over 2}} \right)$$

$$\left( {3,2, - 2, + {1 \over 2}} \right)$$

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Which one of the following corresponds to a photon of highest energy?

$$\lambda$$ = 300 mm

v = 3 $$\times$$ 10⁸ s^$$-$$1

$$\overline v $$ = 30 cm^$$-$$1

$$\varepsilon $$ = 6.626 $$\times$$ 10^$$-$$27 J

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