CBSE Class 12 Physics Nuclei MCQs Set C

Question. The formula which gives the wavelength of emitted photon when electron jumps from higher nergy state to lower was given by 
a) Balmer
b) Paschen
c) Lymen
d) Rydberg

Answer: D

Question. What is the kinetic energy of α-particles bombarded towards the gold nucleus in Geiger and Marsden classic experiment? 
a) 8.8×10^-13 Joule
b) 8.8×10^-15 Joule
c) 8.8×10^-13 Joule
d) x 10^-13 Joule

Answer: A

Question. What is the range of volume of hydrogen nucleus?   
a) 10^-45m.
b) 10^-30m.
c) 10^-15m.
d) 10^-60m.

Answer: A

Question. What is true about Bohr’s atomic Model             
a) His model was unique totally different from other
b) His model is a modification of Rutherford atomic model.
c) His model is a modification of Thomson atomic model.
d) None of the above

Answer: B

Question. Relative density of nucleus with respect to water is     
a) 2.3 × 10¹⁷ kgm^–3
b) 2.3 × 10¹⁴ kgm–³
c) 23 × 10¹⁷ kgm^–3
d) .23 × 10¹⁷ kgm^–3

Answer: B

Question. From R = R0 A1/3how can we conclude that density of almost all the nucleus is same       
a) Volume being proportional to square of R density becomes independent of mass number A
b) Volume being proportional to cube of R density becomes independent of mass number A
c) Volume being proportional to R density becomes independent of mass number A
d) Density has no relation with R

Answer: B

Question. Bohr’s atomic model is applicable for         
a) All types of atoms
b) Only for hydrogen atom
c) For hydrogen like atoms
d) For H₂ gas.

Answer: C

Question. The cause of rejection of Rutherford atomic model was     
a) It was totally wrong
b) It could not justify its stability
c) Rutherford was unable to explain it
d) None of the above.

Answer: B