Match each radiation in Column I with the statements in Column II that are true for it (hc = 1240 eV nm, c = 3 × 1 0 8 m / s ) ( a Column I entry may match more than one Column II entry): Column I (Ra

Question

Match each radiation in Column I with the statements in Column II that are true for it (hc = 1240 eV nm, $c = 3 \times 1 0^{8} m / s) (a$ Column I entry may match more than one Column II entry):

Column I (Radiation)	Column II (Statement)
(P) $λ = 620$ nm	(1) photon energy = 2.0 eV
(Q) $λ = 310$ nm	(2) photon energy > 3.5 eV
(R) $λ = 124$ nm	(3) can eject photoelectrons from a metal of work function 3.0 eV
(S) $λ = 62$ nm	(4) cannot eject photoelectrons from a metal of work function 3.0 eV
	(5) frequency greater than $1 0^{15}$ Hz
	(6) photon energy = 10 eV

Choose the option with the correct matching:

TestHub · Accepted Answer

E = 1240/ λ and ν = c / λ . (P) E = 2.0 eV (1), below 3.0 eV so no emission (4); ν = 4.8 × 1 0 14 Hz. (Q) E = 4.0 eV (2), above 3.0 eV so emission (3); ν = 9.7 × 1 0 14 Hz, not above 1 0 15 . (R) E = 10 eV (2, 6), emission (3), ν = 2.4 × 1 0 15 Hz (5). (S) E = 20 eV (2), emission (3), ν = 4.8 × 1 0 15 Hz (5). Correct matching: P to 1,4; Q to 2,3; R to 2,3,5,6; S to 2,3,5. Answer: (B).

Chemistry - Atomic Structure Question with Solution | TestHub

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