Bonus Marks in NEET 2017 - Physics/Chemistry/Biology




Did you check the Answer Key for NEET 2017? If not then I will provide you the links to get them below.
For now, we are discussing the Bonus marks to be given to all candidates because of some discrepancy in questions given.
According to Allen and Aakash institutes, there are 4 questions having error in them.

        Physics Bonus Marks:

Question: The figure shows a circuit that contains three identical resistors with resistance R = 9.0 W each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf e = 18 V. The current ‘i’ through the battery just after the switch closed is,   …… :-


(1) 0.2 A
(2) 2 A
(3) 0 ampere
(4) 2 mA
Ans. (Bonus)
Solution: at t = 0

Current through the battery is i = 2i 1 = 2 × 2 = 4A (Bonus)
OR
According to question language, Capacitor is not mentioned so i= 2A
This is the bonus question number 26 of SET-X, please do check same question in SET A B C D W Y Z P Q R S. The solution of bonus mark is provided by ALLEN Kota.
Question:
The photoelectric threshold wavelength of silver is 3250 × 10-10 m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 × 10-10 m is :- 
(Given h = 4.14 × 10 –15 eVs and c = 3 × 10ms)
(1) » 0.6 × 10 6 ms–1 (2) » 61 × 10 3 ms–1 (3) » 0.3 × 10 6 ms–1 (4) » 6 × 10 5 ms –1
Ans. (1 or 4)
So this is not a bonus questions. But if you have chosen option 1 or option 4 then your answer is correct.

        Chemistry Paper Wrong Options

Question: It is  because of  the inability of ns2 electrons of the valence shell to participate in bonding that:-
(1) Sn 2+ is oxidizing while Pb 4+ is reducing
(2) Sn 2+ and Pb 2+ are both oxidizing and reducing
(3) Sn 4+ is reducing while Pb 4+ is oxidizing
(4) Sn 2+ is reducing while Pb 4+ is oxidizing
Ans. (In English-4, In Hindi-1)
Sol. Sn +2 —-> Sn +4 (R.A) Sn +2 < Sn +4 Stability order
Pb +4 —>  Pb +2 (O.A) Pb +2 > Pb +4 Stability order (Inert pair effect)
So  Sn 2+ is reducing while Pb 4+ is oxidizing is the correct answer. This question has different answer option in HINDI language.


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