## Chemistry Aptitude Quiz

IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies. Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..

Q1. The end product of (4n+2) disintegration series is
•   _82 Pb^204
•   _82 Pb^208
•   _82 Pb^206
•   _82 Pb^209
Solution
Part C

Q2.The limiting line in Balmer series will have a frequency of
•  32.29×10^15 s^(-1)
•  3.65×10^14 s^(-1)
•  -8.22×10^14 s^(-1)
•  8.22×10^14 s^(-1)
Solution
(c) The limiting line of Balmer series refers to the transition from ∞ to 2nd orbit v=3.29×10^15 (1/(n_1^2 )-1/(n_2^2 )) s^(-1) (n_1=2,n=∞) =3.29×10^15×1/4=8.22×10^14 s^(-1)

Q3.  An atom bomb is based on the principle of
•  Nuclear fusion
•  Nuclear fission
•  Combustion
Solution
Part B
Q4.   The heaviest subatomic particle is
•  Neutron
•  Positron
•  Electron
•  Proton
Solution

(a) Neutron
Q5.The exact path of electron 2p orbital cannot be determined, the above statement is based upon
•  Hund’s rule
•  Bohr’s rule
•  Uncertainty principle
•  Aufbau principle
Solution
Part C

Q6. The ratio of potential energy and total energy of an electron in a Bohr orbit of a hydrogen-like species is
•  2
•  -2
• 1
•  -1
Solution
(a) (KE/E_Total =(-Ze^2)/r_n )⁄((-Ze^2)/(2r_n )=2)

Q7.The orbital diagram in which the Aufbau principle is violated is
•
•
•
•
Solution

Q8.Which nuclear reaction is an example of fusion emission?
•   _94^238 Pu+ _2^4 He→+ _96^242 Cm
•   _11^22 Na→ _10^22 Ne+ _1^0 Î²
•   _3^7 Li+ _1^1 H→ _0^1 n+ _4^7 Be
•   _18^41 Ar+(_-1^0)e→ _17^41 Cl
Solution
(c) Smaller nuclei fuse to form heavier nuclei in nuclear fusion reaction

Q9.〖 _89 Ac〗^227 is a member of actinium series. Another member of the same series of
•  〖 _92 U〗^235
•  〖 _90 Th〗^232
•  〖 _89 Ac〗^225
•  〖 _15 P〗^34
Solution
(a) Both belong to 4n+1 series

Q10. Water used as moderator in nuclear reactor is called
•  There are seven principal electron energy levels
•  The second principal energy level has four sub-energy levels and contain a maximum of eight electrons
•  The principal energy level N can have a maximum of 32 electrons
• The 4s sub-energy level has high energy than 3d subenergy level
Solution
Part C

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