# JEE Main 2019 Question Paper 9th January Slot 1

## Overall Analysis

The JEE main paper consisted of a total of 90 questions and each question was awarded 4 marks for the correct answer, -1 for an incorrect answer and 0 for an unattempted question. Overall the paper was a bit tougher on Physics side while Maths and Chemistry sections were comparatively easier.  Below is the analysis of JEE Mains exam section wise.

## Physics

Physics section was moderately difficult as it had fairly an equal distribution among easy, moderate and hard questions. The questions which are asked from 12th class syllabus are comparatively easier than the 11th class. Around 10-12 questions are concept based, 7-8 questions are direct formula based and some questions also involved lengthy calculations and answers based on calculus. If the student has a good hold on memorizing the formula and is able to apply the right concept to the questions, he/she can easily score 70-80% marks in this section by investing around 45-50 minutes.

## A breakup of marks between different chapters/topics of the Physics section:

 Chapter/Topic Total Marks Chapter/Topic Total Marks Kinematics 4 Electrostatics 12 Laws of motion 4 Current Electricity 16 Work Energy and Power 8 Magnetic Effects of Current and Magnetism 12 Gravitation 4 Electromagnetic induction & Alternating Current 4 Rotational Motion 8 Electromagnetic Waves 4 Properties of Solids and Liquids 8 Optics 8 Thermodynamics 4 Dual Nature of Matter and Radiation 4 Kinetic theory of Gases 4 Atoms And Nuclei 4 Oscillations and Waves 8 Electronic devices 4

## MATHS

Overall the maths section of the paper was moderate to easy. Some questions were tricky. Most questions were based on basic concepts. Questions asked from class 12 was tougher and lengthier than class 11. More questions were asked from class 11. 12-15 questions are direct formula based and some questions also involved lengthy calculations. If the student has good command on basic concepts, he/she can easily score 70-85% marks in this section by investing around 50-70 minutes.

A breakup of marks between different chapters/topics of the Maths section:

 Chapter/ Topic Total Marks Chapter/ Topic Total Marks Binomial theorem and its simple  applications 20 Matrices and Determinants 8 Co-ordinate Geometry 12 Sequence and series 4 Complex numbers and quadratic equations 8 Sets, Relations and Functions 4 Differential equations 12 Statistics and Probability 4 Integral Calculus 12 Three Dimensional Geometry 8 Limit, continuity, and differentiability 12 Trigonometry 8 Mathematical Induction 4 Vector Algebra 4

## Chemistry

The Chemistry section asked in JEE Mains exam consisted of 120 marks. As given in the table below, a total of 15 questions was asked from class 11 and 15 questions were asked from class 12. The chemistry section in this exam was easy vis-a-vis the other sections that are, physics and mathematics. In this section, 16 questions were easy, 12 questions were medium and 2 questions were tough, the detailed analysis of the difficulty level of questions is given in the table below. As this section was quite easy, so students were able to save their time for other sections.

The easy, medium and difficult questions were asked from the following chapters:

Easy: Chemical Bonding, Organic compounds containing Oxygen, Organic compounds containing Nitrogen, Metallurgy, p-block, Periodic classification of elements, Mole concept, Solutions, Haloalkanes and haloarenes, Hydrogen, General Organic Chemistry, Thermodynamics, Electrochemistry.

Medium: Organic compounds containing Oxygen, Organic compounds containing Nitrogen, Coordination compounds, States of matter, Environmental chemistry, s-block, Equilibrium, Surface chemistry, Haloalkanes and haloarenes, Atomic Structure.

Tough: Chemical kinetics, Organic compounds containing Nitrogen.

## A breakup of marks between different chapters/topics of the Maths section:

 Chapter/ Topic Total Marks Chapter/ Topic Total Marks Physical Chemistry 44 Inorganic Chemistry 40 Chemical Bonding 8 Coordination Compounds 4 States of Matter (Gaseous) 4 Process and isolation of Elements 8 Mole Concept 4 p-block 8 Solutions 4 Classification of Elements and Periodic table 4 Chemical Kinetics 4 Environmental Chemistry 8 Equilibrium 4 s-block 4 Surface Chemistry 4 Hydrogen 4 Atomic Structure 4 Organic Chemistry 36 Thermodynamics 4 Organic Compounds Containing Oxygen 12 Electrochemistry 4 Organic compounds containing Nitrogen 12 Haloalkanes and Haloarenes 8 General Organic Chemistry 4

## Marks analysis based on questions asked in different topics of Chemistry:

### JEE Main 2019 Question Paper All Questions

Chemistry
1. Two complexes   and    are violet and yellow  coloured ,respectively. The incorrect statement regarding them is:

 a) 0 values of (A) and (B) are calculated from the engergies of violet and yellow light ,respectively b) both are paramegnetic with three unpaired electrons. c) both absorb energies correponding to their complementary colors. d) 0value for (A) is less than that of (B).
Chemistry - Co-ordination Compounds Coordination compounds:
Marked right : 16.19047619047619% students | Marked incorrect : 22.22222222222222% students | Marked not attempted : 61.58730158730159% students

Correct Option: a

View Solution
2. The correct decreasing order for acid strength is :

 a) b) c) d)
Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Organic Compounds containing Oxygen Aldehydes, Ketones and Carboxylic Acids
Marked right : 26.426426426426424% students | Marked incorrect : 21.02102102102102% students | Marked not attempted : 52.552552552552555% students

Correct Option: d

View Solution
3. The major product of following reaction is:

 a) b) c) d)
Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Organic Compounds Containing Nitrogen Organic Compounds Containing Nitrogen
Marked right : 19.22141119221411% students | Marked incorrect : 25.790754257907544% students | Marked not attempted : 54.98783454987834% students

Correct Option: c

View Solution
4. The highest value of the calculated spin-only magnetic moment (in BM) among all the transition metal complexes is :

 a) 5.92 b) 6.93 c) 3.87 d) 4.9
Chemistry - Co-ordination Compounds Coordination compounds:
Marked right : 33.13609467455622% students | Marked incorrect : 12.721893491124261% students | Marked not attempted : 54.142011834319526% students

Correct Option: a

View Solution
5. 0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume 10mat 1000 K .Given R is the gas constant in JK-1 mol-1 , x is:

 a) b) c) d)
Chemistry - States of Matter States of matter Solid state
Marked right : 30.288461538461537% students | Marked incorrect : 7.9326923076923075% students | Marked not attempted : 61.77884615384615% students

Correct Option: d

View Solution
6. The one that is extensively used as a piezoelectric material is:

 a) tridymite b) amorphous silica c) quartz d) mica
Chemistry - General Principle and process of Isolation of metals General Principles and processes of Isolation Elements
Marked right : 47.48427672955975% students | Marked incorrect : 9.119496855345911% students | Marked not attempted : 43.39622641509434% students

Correct Option: c

View Solution
7. Correct statements among a to d regarding silicones are :

(a) They are polymers with hydrophobic character

(b) They are biocompatible

(c) In general, they have high thermal stability and low dielectric strength.

(d) Usually, they are resistant to oxidation and used as greases

 a) (a), (b), (c) and (d) b) (a), (b) and (c) only c) (a) and (b) only d) (a), (b) and (d) only
Chemistry - p- d- and f-block elements p- Block Elements Some p-Block elements
Marked right : 8.317025440313111% students | Marked incorrect : 10.249510763209393% students | Marked not attempted : 81.4334637964775% students

Correct Option: d

View Solution
8. The major product of the following reaction is:

 a) b) c) d)
Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Organic Compounds containing Oxygen Aldehydes, Ketones and Carboxylic Acids
Marked right : 23.88663967611336% students | Marked incorrect : 23.279352226720647% students | Marked not attempted : 52.834008097166% students

Correct Option: a

View Solution
9. In general ,the properties that decrease and increase down a group in the periodic table ,respectively are :

 a) atomic radius and electronegativity b) electron gain enthalpy and electronegativity c) electronegativity and atomic radius d) electronegativity and electron gain enthalpy
Chemistry - Classification of elements and periodicity in properties Classification of Elements and Periodic table
Marked right : 52.25225225225225% students | Marked incorrect : 9.234234234234235% students | Marked not attempted : 38.513513513513516% students

Correct Option: c

View Solution
10. A solution of sodium sulfate contains 92g of  ions per kilogram of water. The molality of ions in that solution in mol Kg-1 is:

 a) 12 b) 4 c) 8 d) 16
Chemistry - Stoichiometry Some basic concepts in chemistry
Marked right : 14.634146341463413% students | Marked incorrect : 6.445993031358885% students | Marked not attempted : 78.9198606271777% students

Correct Option: b

View Solution
11. The correct match between item I and item -II is

Item-I                              Item-II

(drug)                               (test)

A         chloroxylenol                P   carbylamine test

B         Norethindrone              Q   sodium hydrogen carbonate test

C         Sulphapyridine             R  ferric choride test

D         Penicillamine                S  Baeyer's test

 a) A→R; B→P;C→S;D→Q b) A→Q; B→S;C→P;D→R c) A→R; B→S;C→P;D→Q d) A→Q; B→P;C→S;D→R
Chemistry - Principles Related to Practical Chemistry
Marked right : 5.505350772889417% students | Marked incorrect : 5.053507728894173% students | Marked not attempted : 89.44114149821641% students

Correct Option: c

View Solution
12. A  water sample has ppm level concentration of the following metals: the metal that makes the water sample unsuitable for drinking is:

 a) Cu b) Mn c) Fe d) Zn
Chemistry - Biological , Industrial and Environmental chemistry Environmental Chemistry Environmental Chemistry
Marked right : 43.40723453908985% students | Marked incorrect : 19.603267211201867% students | Marked not attempted : 36.989498249708284% students

Correct Option: b

View Solution
13. The anodic half-cell of lead-acid battery is recharged using electicity of 0.05 faraday .The amount of electrolyzed in g during the process is ;(Molar mass of )

 a) 22.8 b) 15.2 c) 7.6 d) 11.4
Chemistry - Redox Reaction and Electrochemistry
Marked right : 11.033274956217163% students | Marked incorrect : 12.259194395796849% students | Marked not attempted : 76.70753064798599% students

Correct Option: c

View Solution
14. Which one of the following statement regarding Henry's law is not correct?

 a) Higher the value of at a given pressure , higher is the solubility of the gas in the liquids. b) Different gases have different (Henry's law constant) value at the same tempreture c) The mole fraction of the gas in the  solution in vapour phase is proportional to the partial pressure of the gas d) The value of incerases with increase of temperature and  is dependant on the nature of the gas
Chemistry - Solutions
Marked right : 25.825825825825827% students | Marked incorrect : 22.52252252252252% students | Marked not attempted : 51.651651651651655% students

Correct Option: a

View Solution
15. The following results were obtained during kinetic studies of the reaction

2A + B→Product:

 Experiment [A] (in mole L-1) [B] (in mole L-1) Initial rate of reaction (in mole L-1min-1) I 0.10 0.20 6.93 X 10-3 II 0.10 0.25 6.93 X 10-3 III 0.20 0.30 1.386 X 10-2

The time (in minutes) required to consume half of A is:

 a) 5 b) 10 c) 1 d) 100
Chemistry - Chemical kinetics
Marked right : 12.068965517241379% students | Marked incorrect : 17.980295566502463% students | Marked not attempted : 69.95073891625616% students

Correct Option: a

View Solution
16. Major product of the following reaction is:

 a) b) c) d)
Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Organic Compounds Containing Nitrogen Organic Compounds Containing Nitrogen
Marked right : 7.671957671957672% students | Marked incorrect : 16.666666666666664% students | Marked not attempted : 75.66137566137566% students

Correct Option: d

View Solution
17. The alkaline earth metal nitrate that does not crystallise with water molecules, is:

 a) b) c) d)
Chemistry - Hydrogen and s-block Elements S - Block Elements (Alkali and Alkaline Earth Metals) s- Block Elements ( Alkali and Alkaline earth metals )
Marked right : 26.923076923076923% students | Marked incorrect : 22.355769230769234% students | Marked not attempted : 50.72115384615385% students

Correct Option: d

View Solution
18. 20 mL of 0.1 M H2SO4 solution is added to 30 mL of 0.2 M NH4OH solution. The pH of the resultant mixture is: [pkb of NH4OH = 4.7]

 a) 5.2 b) 9 c) 5 d) 9.4
Chemistry - Equilibrium
Marked right : 5.892700087950748% students | Marked incorrect : 8.53122251539138% students | Marked not attempted : 85.57607739665787% students
19. Adsorption of gas follows Freundlich adsorbtin isotherm. In the given plox ,x is the mass of the gas on mass m of the adsorbent at pressure P.   $\frac{x}{m}$  is propotional to: