JEE Main 2020 Answer Key (Out), September Exam Papers – Check Here

JEE Main 2020 Institutional Answer key has been released. The official answer key is releasing soon after the exam. JEE Main is conducted for providing admission into UG engineering/ architecture courses (B.Tech/B.Arch). These courses are offered by the NITs, IITS & IIITs and other government and non-government engineering institutions. JEE Main exam is organized by the National Testing Agency (NTA). Through this article, candidates can get the JEE Main Answer Keys 2020 and also previous year answer key and question papers with all solutions.

JEE Main Answer Keys 2020 – Released 

JEE Main 2020 Institutional Answer Key has been released. The official answer key is releasing soon after the exam. Check below for details. Click here to subscribe alert. 

JEE Main 2020 (6th September) Answer Key by Resonance:

Subjects	Shift – 1	Shift – 2
Physics	Click Here	Click Here
Chemistry	Click Here	Click Here
Mathematics	Click Here	Click Here

JEE Main 2020 (5th September) Answer Key by Resonance:

Subjects	Shift – 1	Shift – 2
Physics	Click Here	Click Here
Chemistry	Click Here	Click Here
Mathematics	Click Here	Click Here

JEE Main 2020 (4th September) Answer Key by Resonance:

Subjects	Shift – 1	Shift – 2
Physics	Click Here	Click Here
Chemistry	Click Here	Click Here
Mathematics	Click Here	Click Here

JEE Main 2020 (3rd September) Answer Key by Resonance:

Subjects	Shift – 1	Shift – 2
Physics	Click Here	Click Here
Chemistry	Click Here	Click Here
Mathematics	Click Here	Click Here

JEE Main 2020 (2nd September) Answer Key by Resonance:

Subjects	Shift – 1	Shift – 2
Physics	Click Here	Click Here
Chemistry	Click Here	Click Here
Mathematics	Click Here	Click Here

Memory Based Answer Key for 4th September 2020

Q. 1: What is the role of the CaCo3 in the extraction of iron?

1. If decomposes to form CaCo3 which acts as a flux
2. It is used a reducing agent
3. For purification of iron
4. None of these

Q. 2: Which is the following is not a method of purification of colloid?

1. Dialysis
2. Peptization
3. Electrodialysis
4. Ultrafiltration

Answer: 2. Peptization 

Q. 3: A Balmer series lies in which region of the electromagnetic spectrom?

1. Ultraviolet
2. Infrared
3. Visible range
4. Microwave

Answer: 3. Visible range 

Q. 4: A circular disc of mass M and radius R rotating with the speed w and another disc of the same mass M and radius R/ 2 placed coaxially on first disc. After sometime, disc 2 also attain constant speed w∨2 . Find the loss of percentage in energy.

Answer: 20%

Q. 5: Two charges 4q and -q are kept on x-axis at (-d/2,0) and (d/2,0). Then a charge +q is is moved from the origin to x=d via semi circler path. Then find the charge in its energy.

Answer: 16kq/3d

Q. 6: In maltose structure which three groups are there?

Answer: Hemiacetal, acetal 

Q. 7: For the first order reaction/ 75% reaction complete in 90 min. For the same reaction 60% complete in what time?

Answer: 33 min 

Q. 8: Leat nitrate on heating gives A, A on cooling gives B, NO with B give C (blue solid). Find oxidation number of N in compound C.

1. +1
2. +2
3. +3
4. +4

Answer: 3. +3

Q. 9: Which is the following reacts with CHCl3+ KOH?

1. Adenine and uracil
2. Adenine and lysine
3. Adenine and thymine
4. Adenine and uracil

Answer: 3. Adenine and thymine 

Q. 10: It is given that AB=15 and CD=10. They are parallel rods on the ground. AC and BD meet hypothetically at P. Find distance of P from the ground.

Answer: -6 

Q. 11: Element with atomic number 101 and 104 belongs to the group respectively.

1. Actinoacids and gr 4
2.  gr 4 and gr 3
3. gr 4 and gr 5
4. None

Answer: 1. Actinoacids and gr 4 

Q. 12: If from point P (3,3) on the hyperbola as a normal is drawn which cuts x-axis at (9,0) on the hyperbola x2/a2-y2/b2 =1 then the value of (a2, e2) is:

Answer: (9/2, 3)

Q. 13: Which represents the correct order of ionic radii?

Answer: Mg2+<Na+<F-<O2 2-

Q. 14: 76% people read newspaper A and 63% read newspaper B then the probability of people who read both of the newspapers are?

Q. 15: A solution contains two volatile solvents of 1 mole of n- hexane and 3 mole of n- heptane. In this case, vapour pressure of the solution 550 mm Hg. If 1 mole of 1- Heptane if further added to solution. The vapour pressure increases by 10 mm Hg. Find out the pressure of pure n- Heptane solution?

Answer: 600 mm Hg 

Memory Based Answer Key for 3rd September 2020

Q.1: Thermal power plant cause

1. Acid rain
2. Ozone layer depletion
3. baby syndrome
4. eutrophication

Aswer: 1. Acid rain 

Q. 2: No. of P=o, P-oh, P-o-p bond is pyrophosphoric acid?

Q. 3: If a variable place in 3-0 space moves in such a way that the sum of its intercepts on the x and y-axis exceeds, the reciprocal of its intercept on the Z-axis is by 2, then all such plane will pass through  the point:

1. (1/2, 1/2, -1/2)
2. (1/2, 1/2, 1/2)
3. (1/2, -1/2, -1/2)
4. (1/2, -1/2, 1/2)

Answer: (1/2, 1/2, -1/2)

Q. 4: A bag is contain 6 red balls and 10 orange balls. 3 balls are drawn from it one by one randomly without replacement. if the third ball drawn is red, then the probably that the first two balls are green is:

1. 3/7
2. 9/149
3. 9/56
4. 3/8

Answer: 1. 3/7 

Q. 5: If the first term is 3 and sum of the first 25 terms is equal to the sum of the next 15 terms then find the common difference?

Q. 6: Let the data 4, 10, x, y, 27 be in increasing order. If the medium of data is 18 and its mean deviation about mean is 7.6, then the mean of this data is:

1. 7
2. 16
3. 16.5
4. 15.5

Answer: 1. 7 

Q. 7: Let the ellipse, x2/ a2, y2/ b2 = 1, if a > b pass through the point (2,3) and have eccentricity equal to 1/2, then the equation of normal to the ellipse to (2,3) is:

Q. 8: Gas released When Ay, Pt dissolved in Aqua region

1. NO
2. N2
3. N2O3
4. N2O5

Answer: 1. NO

Q. 9: Number of isomers including stereoisomers of simplest optically active alkene after hydrogenation H2/ Ni and monohalogenation with HX

Answer: 8

Q.10: Min bond length

1. NO2⁺
2. NO⁺
3. NO
4. NO^–

Q. 11: Find % w/w of H₂O in solution containing glucose with Xgluc =0.1

1. 20%
2. 47.3%
3. 25.3%
4. 27.4%

Answer: 2. 47.3%

Q. 12: Most basic amino acid is?

Answer: Cystein

Q. 13: A solution of 4% X and another solution having 12% Y (both soliton have same solvent). If molar mass X is A then molecular mass of Y is:

1. 3A
2. A
3. A/2
4. 2A

Answer: 1. 3A

Q. 14: If the centre of circle lies on x+y=2 and it touches the line x=3 and y=2, find the diameter of the circle?

Answer: 3

Q. 15: A dice is thrown twice. Sum of both the observation is a multiple of 4. Find the probability that 4 appeared at at least once?

Answer: 1/9

Q. 16: If the wavelength on incident radiation changes from 500nm to 200nm, then the maximum kinetic energy increases to three times. Find the work function?

Answer: 0.62eV

Q. 17: Pressure inside soap bubble is 1.01 and 1.02 atmosphere. The ratio between their volume is:

1. 102:101
2. (102)3: (101)3
3. 8:1
4. 2:1

Answer: 3. 8:1 

Q. 18: A ballon contain He gas at ‘T’ get burst then it is:

1. Reversible isothermal
2. Irreversible isothermal
3. Reversible adiabatic
4. Irreversible adiabatic

Answer: 4. Irreversible adiabatic

Q. 19: Boiling point of water is 273k, then the boiling point of H2S is:

1. >373k
2. <373k
3. 373k
4. 373>x>300k

Answer: 2. <373k

Q. 20: Find the atomic number of unnilennium

1. 101
2. 107
3. 109
4. 119

Answer: 3. 109

Q. 21: How glycerol can be purified

1. Distillation under reduced pressure
2. Fractional distillation
3. Differential extraction
4. steam distillation

Answer: 1. Distillation under reduced pressure 

Answer Key for 2nd September 2020 

Q. 1: Which of the following is different sol?

1. butter
2. paints
3. gen stone
4. cake

Answer: 3. gen stone 

Q. 2: Find the length and the foot of perpendicular from the point of (1, 3/2,2) to the plane 2x-2y+4z+5=0.

Q. 3: Which property has different order wrt others?

1. Atomic radius
2. Electronegativity
3. Ionisation energy
4. Electrongain Enthalpy

Answer: 1. Atomic radius 

Q. 4: What is structure of Dettol?

Q. 5: If F=ma and mass (M) is defined as α and acceleration (a) is defied as β. The find the new SI unit of F.

Q. 6: F(x)=-(3/4)X2-8X3-42/5X2+105.  calculate local maxima and local minima.

Answer Key for 1st September 2020 

Q. 1: A boy can throw a stone up to a maximum height of 10m. The maximum horizontal distance that the boy can throw the same stone will be-

1. 20m
2. 20?2m
3. 10m
4. 10?2m

Answer- 1. 20m

Q. 2: Where is Notre Dame Cathedral located?

Answer- Paris, France

Q. 3: An equation of plane parallel to the plane x-2y+2z-5 =0 and at a unit distance from the origin is-

1. x-2y+2z-5=0
2. x-2y+2z-3=0
3. x-2y+2z+1=0
4. x-2y+2z-1=0

Answer- 2. x-2y+2z-3=0

Q. 4: A Carnot engine whose efficiency is 40% takes in the heat from a source maintained at a temperature of 500 k. It is desired to have an engine of efficiency of 60%. Then the intake temperature from the same exhaust (sink) temperature must be-

1. 600 k
2. Efficiency of Carnot cannot be made larger than 50%
3. 1200 k
4. 750 k

Answer- 4. 750 k

Q. 5: If the line 2x=y=k passes through the point which divides the line segment joining the points (1,1) and (2,4) the ratio 3:2, then k equals-

1. 11/15
2. 29/5
3. 5
4. 6

Answer- 4. 6

Q. 6: Where does the president of USA lives?

Answer – The white house

Q. 7: A thin liquid film formed between a U- shaped wire and a light slider supports and weight of 1.5×10-2N. The length of the slider is 30 cm and its weight negligible. The surface tension of the liquid film is-

Answer- 0.025

Q. 8: Where Bara Imambra is located?

Answer: Lucknow

Q. 9: Downing street is whose residence?

Answer: Downing Street is the residence of the prime minister of the United Kingdom (the lord of the treasury).

Q. 10: Where is Badrinath located?

Answer: Uttarakhand

Q. 11: Which colour represents equality?

Answer: White

Q. 12: Where is leaning tower located?

Answer: Italy 

Q. 13: What does shaft represent?

Q. 14: If pth, nth, rah terms of G.P. then p,q,r are in?

Q. 15: Given 30 observation then 10 observations are 1/2-d, other 10 observations are d and remaining 10 observations are 1/2+d, the variance is given 4/3

Q. 16: Draw a highway road diagram with car and truck in opposite directions

Q. 17: F (x+y)= f(x).f(y)x, y€N f(1)=2 then sigma k= 1 to 50 f(4+k)=

Q. 18: Free fall of an object in vacuum in the case of motion

Q. 19: Who designed IIM?

Answer: Luis Khan 

Q. 20: Which colour reflects the maximum light?

Q. 21: a1 a2 a3 a4 a5 are ap. sum of the term is equal to 30. product of the term is equal to 3840. find product of first and last term

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JEE Main 2020 Final Answer Key (January Session)

Check JEE Main January session final answer key for paper I and paper II in the given table:

Jee Main 2020 Papers	Answer Key
Paper I	Click Here
Paper II	Click Here

Memory Based Answer Key – By Coaching Institutions

Check below memory based answer key for Jee Main January session released by resonance, Narayana and other coaching institutes:

JEE Main 2020 Answer Key by Resonance:

Subjects	Shift – 1	Shift – 2
Physics	Click Here	Click Here
Chemistry	Click Here	–
Mathematics	Click Here	–

JEE Main 2020 Answer Key by Narayana:

Date	Morning	Evening
7th January	Click Here	Click Here
8th January	Click Here	Click Here

JEE Main 2020 Answer Key by Vibrant Academy:

Date	Shift 1	Shift 2
7th January	Click Here	Click Here
8th January	Click Here	Click Here

After the successful completion of examination, the tentative answer keys will be released by the coaching institutions. The official answer key also has been released by the NTA on 13th January 2020 for January session JEE Main exam & in the month of September 2020 for second session exam. The  answer key is a set of answers for the questions that will be asked in the exam.

The answer key help the students in evaluating the right answers of the question and also helps in calculating their expected score. Starting from the exam date till the result date, a highly pressure and tensed time is very hard to pass by students without knowing that how they have performed on exam sheet. But by evaluating answer key they can lower down their tension.

Also Check:

JEE Main 2020 Question Papers

JEE Main 2020 Cut Off

Answer Key Declaration Date

The JEE Mains official answer key has been released from 13th January 2020 (Jan Exam). For second session, it will be released in the month of September 2020. Candidates are able check the answer keys along with the images of response sheets. With the help of answer keys, candidates are able to predict that how much marks they will score in the entrance exam. The final answer key has been published in September 2020 by NTA.

How to Download the Answer Key

Follow the given steps to download the JEE Mains answer key:

• Visit to the official link. (link will be provided above)
• Enter application Number, password and security pin.
• Click on login button.
• The answer key of all sets will be displayed on the screen.
• Download the answer key.
• Take the print copy of the answer key for future use.

Also Check:

JEE Main 2020 Rank Predictor

JEE Main 2020 College Predictor

How to Challenge the Answer Key

Candidates will be able to challenge the answer key if they are not satisfied with the answers. The challenge of JEE Main answer key will be accepted through an online process only. Candidates have to fill the application form & deposit Rs. 1000 per question to challenge the answer key before the last date of challenging. The challenges submitted by post or in person will not be accepted.

Candidates can submit the fee through Credit Card/Debit Card, SBI Buddy and Paytm. The fee is non-refundable once paid. The final decision regarding the answer key challenge will be made by the NTA.

JEE Main Previous Year Papers & Keys

Candidates can check the JEE Main question papers along with their answer keys for Paper 1 & Paper 2 below:

For 2019:

JEE Main 2019 January Session Paper 1	Sessions	Question Papers	Answer Key
9th January	Forenoon Session	Click Here	Click Here
	Afternoon Session	Click Here
10th January	Forenoon Session	Click Here
	Afternoon Session	Click Here
11th January	Forenoon Session	Click Here
	Afternoon Session	Click Here
12th January	Forenoon Session	Click Here
	Afternoon Session	Click Here
JEE Main 2019 January Session Paper 2
8th January	Forenoon Session	Click Here	Click Here
	Afternoon Session	Click Here

 

JEE Main 2019 April Session Paper 1	Sessions	Question Papers	Answer Key
8th April	Forenoon Session	Click Here	Click Here
	Afternoon Session	Click Here
9th April	Forenoon Session	Click Here
	Afternoon Session	Click Here
10th April	Forenoon Session	Click Here
	Afternoon Session	Click Here
12th April	Forenoon Session	Click Here
	Afternoon Session	Click Here
JEE Main 2019 April Session Paper 2
7th April	Forenoon Session	Click Here	Click Here
	Afternoon Session	Click Here

For 2018:

Exam Date	Question Papers
8th April 2018	SET A | SET B | SET C | SET D
15th April 2018	Morning | Evening
16th April 2018	Morning

For Paper 1 (B.Tech):

Download SET A	Download SET B
Download SET C	Download SET D

For Paper 2 (B.Arch/B.Planning):

Download SET S

Download SET T

For 2017:

Candidates may also check the JEE Main question papers from here:

Download SET A	Download SET B
Download SET C	Download SET D

Download SET E	Download SET F
Download SET G	Download SET H

Download CBT Paper held on 9th April 2016

Download CBT Paper held on 10th April 2016

JEE Main Answer Key (Institutional)

Candidates can check last year JEE Main answer key prescribed by Sarvgyan and various other coaching institutions from here for CBT exam:

JEE Main 2019 Institutional Answer Key (January Session)

In the table given below we have provided the answer keys for various shifts:

Exam Date	Subject	Shift 1	Shift 2
Answer Keys & Question Papers (Career Point)
9th January 2019	Mathematics	Click Here	Click Here
	Physics	Click Here	Click Here
	Chemistry	Click Here	Click Here
10th January 2019	Mathematics	Click Here	Click Here
	Physics	Click Here	Click Here
	Chemistry	Click Here	Click Here
11th January 2019	Mathematics	Click Here	Click Here
	Physics	Click Here	Click Here
	Chemistry	Click Here	Click Here
Answer Keys & Question Papers (Resonance)
9th January 2019	Mathematics	Available Soon	Available Soon
	Physics	Click Here	Click Here
	Chemistry	Available Soon	Available Soon
10th January 2019	Mathematics	Available Soon	Available Soon
	Physics	Available Soon	Available Soon
	Chemistry	Available Soon	Available Soon
11th January 2019	Mathematics	Available Soon	Click Here
	Physics	Click Here	Click Here
	Chemistry	Click Here	Click Here

JEE Main 2019 Institutional Answer Key (April Session)

Answer key by Resonance:

Exam Date	Shift	Subject
		Physics	Chemistry	Mathematics
8th April 2019	Forenoon Shift	Click Here	Click Here	Click Here
	Afternoon Shift	Click Here	Click Here	Click Here
9th April 2019	Forenoon Shift	Click Here	Click Here	Click Here
	Afternoon Shift	Click Here	Click Here	Click Here
10th April 2019	Forenoon Shift	Click Here	Click Here	Click Here
	Afternoon Shift	Click Here	Click Here	Click Here
12th April 2019	Forenoon Shift	Click Here	Click Here	Click Here
	Afternoon Shift	Click Here	Click Here	Click Here

Answer key by Career Point:

Exam Date	Shift	Subject
		Physics	Chemistry	Mathematics
8th April 2019	Forenoon Shift	Click Here	Click Here	Click Here
	Afternoon Shift	Click Here	Click Here	Click Here
9th April 2019	Forenoon Shift	Click Here	Click Here	Click Here
	Afternoon Shift	Click Here	Click Here	Click Here

JEE Main 2018 Institutional Answer Key (April Session)

Institution	Question Paper	Answer Keys
Resonance	15th April | 16th April	15th April | 16th April
RAO IIT	15th April	15th April
Ask IITians	15th April (Morning Shift)	15th April (Morning Shift)

Check here the answer keys for offline exam of JEE Main:

Answer Keys (Offline Exam)	Downloads for All Sets (Codes)
JEE Main Answer Key by SarvGyan	SET A | SET B | SET C | SET D
JEE Main Answer Key by Plancess	SET A | SET B | SET C | SET D
JEE Main Answer Key by Rao IIT Academy	SET A | SET B | SET C | SET D
JEE Main Answer Key by Aakash Institute	SET A | SET B | SET C | SET D
JEE Main Answer Key by Resonance	SET A | SET B | SET C | SET D
JEE Main Answer Key by FIITJEE	All Sets
JEE Main Answer Key by Motion IIT-JEE	All Sets
JEE Main Answer Key by Career Launcher	SET A | SET B | SET C | SET D
JEE Main Answer Key by Career Point	All Sets
JEE Main Answer Key by Allen Kota	All Sets
JEE Main Answer Key by T.I.M.E.	All Sets
JEE Main Answer Key by Vidyamandir	SET A | SET B | SET C | SET D
JEE Main Answer Key by Bansal Classes	SET A | SET B | SET C | SET D
JEE Main Answer Key by Toppr	All Sets
JEE Main Answer Key by IITians PACE Academy	SET A | SET B | SET C | SET D
JEE Main Answer Key by Vibrant Academy	SET A | SET B | SET C | SET D
JEE Main Answer Key by Brilliant Pala	SET A | SET B | SET C | SET D
JEE Main Answer Key by Narayana	SET A | SET B | SET C | SET D
JEE Main Answer Key by Sri Chaitnaya	All Sets
JEE Main Answer Key by Vidyalankar	SET A | SET B | SET C | SET D

JEE Main Question Paper Solutions

Candidates may also check the last year JEE Main question paper solutions from here:

Institute	Downloads
JEE Main Question Paper Solutions by Vidyamandir Classes	SET B – Physics  | Chemistry | Mathematics
JEE Main Question Paper Solutions Solutions by Aakash Institute	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions by Allen Kota	SET C – Physics  | Chemistry | Mathematics
JEE Main Question Paper Solutions by Motion IIT-JEE	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions by Career Point	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions by IITians PACE Academy	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions by Sri Chaitnaya	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions by Vibrant Academy	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions Solutions by Resonance	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions Solutions by Rao IIT Academy	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions Solutions by Vidyalankar	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions Solutions by T.I.M.E.	SET A | SET B | SET C | SET D
JEE Main Question Paper Solutions Solutions by Narayana	SET A | SET B | SET C | SET D

Note: JEE main answer key prepared by different coaching institutes are correct to their knowledge. Sarvgyan will not be responsible for any misprint, wrong answer and any sort of variation in the answer key of different coaching institutes.

Candidates having any doubt for JEE Main Answer Key 2020, can drop comments in the comment box.

The post JEE Main 2020 Answer Key (Out), September Exam Papers – Check Here appeared first on SarvGyan.