Tiêu đề 02. STRUCTURE OF ATOM - 10.pdf ✅

JEE JEE 2025 Q1 The ratio of energies of first excited state of ion and ground state of -atom is (A) 1:1 (B) 4:1 (C) 1:4 (D) 16:1 Q2 The energy of electron in hydrogen atom in its grounds state is . The energy of the level corresponding to the quantum number equal to 5 is (A) (B) (C) (D) Q3 The value of the energy for the first excited state of hydrogen atom will be (A) (B) (C) (D) Q4 The potential energy of electron revolving in the ground state of atom is (A) (B) (C) (D) Zero Q5 The energy of electron in first orbit of is . The energy of electron in the first orbit of is: (A) (B) (C) (D) Q6 The amount of energy required to remove the electron from a ion in its ground state is how many times greater than the amount of energy required to remove the electron from an atom in its ground state? (A) 9 (B) 2 (C) 3 (D) 5 Q7 The ratio of the difference in energy between the first and the second Bohr orbit to that between the second and the third Bohr orbit is (A) (B) (C) (D) Q8 In the ground state of the -atom, the electron is: (A) In the second shell (B) In the nucleus (C) Nearest to the nucleus (D) Farthest from the nucleus Q9 According to Bohr's model of hydrogen atom (A) Total energy of the electron is quantized (B) Angular momentum of electron is quantized (C) Both (A) and (B) (D) None of the above Q10 The K.E. of electron in will be maximum in (A) third orbit (B) first orbit (C) seventh orbit (D) infinite orbit Q11 As the orbit number increases, the K.E. and P.E. for an electron: (A) both increases (B) both decreases (C) K.E. increases but P.E. decreases (D) P.E. increases but K.E. decreases Q12 The ratio of energies of first excited state of ion and ground state of -atom is Chemistry ATOMIC STRUCTURE DPP: 10 He+ H −13.6 eV −0.54 eV −0.85 eV −0.64 eV −0.40 eV −13.6 eV −3.40 eV −1.51 eV −0.85 eV H −13.6 eV −6.8 eV −27.2 eV He+ (RH = −871.6 × J 10 ) −20 H −871.6 × J 10−20 −435.8 × J 10−20 −217.9 × J 10−20 −108.9 × J 10−20 Li2+ H 1 2 1 3 4 9 27 5 H He+ He+ H
JEE ( A ) ( B ) ( C ) ( D ) Q13 For which atom or ion, the energy level of the second excited state is ? (A) (B) (C) (D) Q14 If in Bohr's model, for a uni -electronic atom, the time period of revolution is represented as , where ' n' represents shell no. and represents atomic number then the value of will be : (A) 8:1 ( B ) 1:8 ( C ) 1:1 ( D ) 1:32 Q15 What is the ratio of time periods in second orbit of hydrogen atom to third orbit of ion ? ( A ) ( B ) ( C ) ( D ) None of these 1 : 1 4 : 1 1 : 4 16 : 1 13.6 eV H He + Li2+ Li Tn,z ZT1,2 : T 2,1 ( / ) T1 T2 He + 8/27 32/27 27/32
JEE Answer Key Q 1 ( A ) Q 2 ( A ) Q 3 ( B ) Q 4 ( C ) Q 5 ( C ) Q 6 ( A ) Q 7 ( D ) Q 8 ( C ) Q 9 ( C ) Q10 ( B ) Q11 ( D ) Q12 ( A ) Q13 ( C ) Q14 ( D ) Q15 ( B )