WB JEE 2017 | Atomic Structure Question 19 | Chemistry

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

WB JEE 2016

MCQ (Single Correct Answer)

-0.25

The energy required to break one mole of hydrogen-hydrogen bonds in H₂ is 436 kJ. What is the longest wavelength of light required to break a single hydrogen-hydrogen bond?

68.5 nm

137 nm

274 nm

548 nm

WB JEE 2016

MCQ (Single Correct Answer)

-0.5

The time taken for an electron to complete one revolution in Bohr orbit of hydrogen atom is

$${{4{m^2}\pi {r^2}} \over {{n^2}{h^2}}}$$

$${{{n^2}{h^2}} \over {4m{r^2}}}$$

$${{4{\pi ^2}m{r^2}} \over {nh}}$$

$${{nh} \over {4{\pi ^2}m{r^2}}}$$

WB JEE Subjects