Browse by Stream
QnA
Home
Search for Exam, Articles, Questions
QnA
get app
Go To Your Study Dashboard
  1. Home
  2. JEE Main
  3. JEE Main 2019 Question Paper

JEE Main 2019 Question Paper

None

Analysis of JEE Main Paper 2019

JEE Main 2019 Question Paper All Questions

    Chemistry

  1. Consider the reaction N_{2}(g)+3H_2(g)\rightleftharpoons 2N\! \! H_3(g). The equilibrium constant of the above reaction is K_{p}. If pure ammonia is left to dissociate, the partial pressure of ammonia at equilibrium is given by ( Assume that P_{NH_{3}}< < p_{total}  at equilibrium )
    a)

    \frac{3^{\frac{3}{2}}K_{p}^{\frac{1}{2}}P^{2}}{16}

    		 b)

    \frac{3^{\frac{3}{2}}K_{p}^{\frac{1}{2}}P^{2}}{4}
    c)

    \frac{K_{p}^{\frac{1}{2}}P^{2}}{4}

    		 d)

    \frac{K_{p}^{\frac{1}{2}}P^{2}}{16}
    Chemistry - Equilibrium
    Marked right : 15.24390243902439% students | Marked incorrect : 11.28048780487805% students | Marked not attempted : 73.47560975609755% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: a

    View Solution

  2. An organic compound is estimated through Dumas method and was found to evolve 6 moles of CO_{2}, 4 moles of H_{2}O and 1 mole of nitrogen gas . The formula of the compound is:
    a)

     C_{12}H_{8}N

    		 b)

    C_{12}H_{8}N_{2}
    c)

    C_{6}H_{8} N_{2}

    		 d)

    C_{6}H_{8}N
    Chemistry - Purification and Characterisation of Organic Compounds Organic Chemistry - some Basic principles and techniques
    Marked right : 18.75% students | Marked incorrect : 10.119047619047619% students | Marked not attempted : 71.13095238095238% students
    (Asked in: NEET - 1970)

    Correct Option: c

    View Solution

  3. A solid having density of 9\times 10^{3} kg m^{-3} forms face centred cubic crystals of edge length 200\sqrt{2} pm. What is the molar mass of the solid ?

    [ Avogadro constant \cong 6\times 10^{23} mol ^{-1}, \pi \cong 3]
    a)

     0.0216 kg mol^{-1}

    		 b)

    0.0305\: kg\: mol^{-1}
    c)

    0.0432kg \: \: mol^{-1}

    		 d)

     0.4320\: kg \: mol^{-1}
    Chemistry - States of Matter States of matter States of Matter : Gases and liquids
    Marked right : 26.358695652173914% students | Marked incorrect : 7.336956521739131% students | Marked not attempted : 66.30434782608695% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: b

    View Solution

  4. Two blocks of the same metal having same mass and at temperatures \mathrm{T_{1}} and \mathrm{T_{2}} respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure . The change in entropy, \mathrm{\Delta S} for this process is:
    a)

    \mathrm{2 C_{p}\ ln \left(\frac{T_{1}+T_{2}}{4 T_{1} T_{2}}\right)}

    		 b)

    \mathrm{C_{p}\ ln\left[\frac{\left(T_{1}+T_{2}\right)^{2}}{4 T_{1} T_{2}}\right]}
    c)

    \mathrm{2 C_{p} I n\left[\frac{\left(T_{1}+T_{2}\right)^{2}}{2 T_{1} T_{2}}\right]}

    		 d)

      \mathrm{2 C_{p} I n\left[\frac{\left(T_{1}+T_{2}\right)^\frac{1}{2}}{T_{1} T_{2}}\right]}
    Chemistry - Chemical Thermodynamics
    Marked right : 17.02127659574468% students | Marked incorrect : 12.76595744680851% students | Marked not attempted : 70.2127659574468% students
    (Asked in: NEET - 1970)

    Correct Option: b

    View Solution

  5. 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 Nitrogen Organic Compounds Containing Nitrogen
    Marked right : 5.729166666666666% students | Marked incorrect : 28.125% students | Marked not attempted : 66.14583333333334% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: a

    View Solution

  6. The major product of the following reaction is :
    a)

    		b)

    c)

    		d)

    Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes
    Marked right : 13.271028037383179% students | Marked incorrect : 22.05607476635514% students | Marked not attempted : 64.67289719626169% students
    (Asked in: NEET - 1970)

    Correct Option: b

    View Solution

  7. The element that usually does NOT show variable oxidation states is:
    a)

     V

    		 b)

    Sc
    c)

    Cu

    		 d)

    Ti
    Chemistry - p- d- and f-block elements d - and f - BLOCK ELEMENTS d and f Block Elements
    Marked right : 44.65408805031446% students | Marked incorrect : 18.71069182389937% students | Marked not attempted : 36.63522012578616% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: b

    View Solution

  8. Among the following compounds, which one is found in RNA ?
    a)

    		b)

    c)

    		d)

    Chemistry - Biomolecules Biomolecules
    Marked right : 32.24368499257058% students | Marked incorrect : 21.693907875185737% students | Marked not attempted : 46.062407132243685% students
    (Asked in: NEET - 1970)

    Correct Option: c

    View Solution

  9. The concentration of dissolved oxygen (DO) in cold water can go upto :
    a)

    16 ppm

    		 b)

    10 ppm
    c)

    14 ppm

    		 d)

    8 ppm
    Chemistry - Biological , Industrial and Environmental chemistry Environmental Chemistry Environmental Chemistry
    Marked right : 35.01006036217304% students | Marked incorrect : 17.102615694164992% students | Marked not attempted : 47.88732394366197% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: b

    View Solution

  10. The correct statements among (a) to (d) regarding H_{2} as a fuel are :

    (a) It produce less pollutants than petrol.

    (b) A cylinder of compressed dihydrogen weighs \sim 30 times more than a petrol tank producing the same amount of energy 

    (c) Dihydrogen is stored in tanks of metal alloys like NaNi_{5}.

    (d) On combustion, values of energy released per gram of liquid dihydrogen and LPG are 50 and 142 kj, respectively .
    a)

    (a) , (b) and (c) only

    		 b)

    (b) ,(c) and (d) only 
    c)

    (a) and (c) only 

    		 d)

    (b) and (d) only 
    Chemistry - Hydrogen and s-block Elements Hydrogen Hydrogen
    Marked right : 6.2228779725742065% students | Marked incorrect : 7.837181044957473% students | Marked not attempted : 85.93994098246831% students
    (Asked in: NEET - 1970,) (Asked in: KCET - 1970,) (Asked in: BITSAT - 1970,) (Asked in: KEAM - 1970)

    Correct Option: a

    View Solution

  11. 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 : 19.54674220963173% students | Marked incorrect : 15.864022662889518% students | Marked not attempted : 64.58923512747874% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: c

    View Solution

  12. NaH is an example of :
    a)

    Electron-rich hydride.

    		 b)

    Saline Hydride .
    c)

    Metallic hydride .

    		 d)

    Molecular hydride .
    Chemistry - Hydrogen and s-block Elements Hydrogen Hydrogen
    Marked right : 39.804639804639805% students | Marked incorrect : 26.129426129426133% students | Marked not attempted : 34.065934065934066% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: b

    View Solution

  13. For the cell Zn(s)\left | Zn^{2+}(aq) \right |\left | M^{x+}(aq) \right |M(s), different half cells and their standerd electrode potential are given below :

    If E^{0}_{zn^{2+}/zn} = -0.76V , which cathode will give a maximun value of E^{0}_{cell} per electron transfered?
    a)

    Au^{3+}/Au

    		 b)

    Fe^{3+}/Fe^{2+}
    c)

    Fe^{2+}/Fe

    		 d)

    Ag^{+}/Ag
    Chemistry - Electrochemistry Redox Reaction and Electrochemistry Electrochemistry
    Marked right : 24.20212765957447% students | Marked incorrect : 13.031914893617023% students | Marked not attempted : 62.76595744680851% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: a

    View Solution

  14. Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H-atom is suitable for this purpose ?

    \left [ R_{H}= 1\times 10^{5}cm^{-1},h= 6.6\times 10^{-34}Js,c= 3\times 10^{8}ms^{-1} \right ]
    a)

    Paschen,5\rightarrow 3

    		 b)

    Lyman,\infty \rightarrow 1
    c)

    \; \; \; Balmer,\infty \rightarrow 2\: \:

    		 d)

    Paschen,\infty \rightarrow 3
    Chemistry - Atomic Structure Structure of Atom Atomic Structure
    Marked right : 27.454242928452576% students | Marked incorrect : 14.309484193011649% students | Marked not attempted : 58.23627287853578% students
    (Asked in: NEET - 1970,) (Asked in: TS EAMCET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: d

    View Solution

  15. The chloride that CANNOT get hydrolysed is:
    a)

    SnCl_{4}

     

    		 b)

    PbCl_{4}
    c)

    CCl_{4}

    		 d)

    SiCl_{4}
    Chemistry - p- d- and f-block elements p- Block Elements Some p-Block elements
    Marked right : 34.39306358381503% students | Marked incorrect : 13.872832369942195% students | Marked not attempted : 51.73410404624278% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: c

    View Solution

  16. Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II):

    (column I)                              (column II)

    Metal                                     Coordination compound(s)/enzyme(s)

    (A) Co                                    (i) Wilkinson catalyst 

    (B) Zn                                     (ii)Chlorophyll

    (C) Rh                                    (iii)Vitamin B_{12}

    (D) Mg                                    (iv) Carbonic anhydrase
    a)

    ( A) - (ii); (B) - (i); (C) - (iv); (D) - (iii)

    		 b)

    ( A) - (iv); (B) - (iii); (C) - (i); (D) - (ii)
    c)

    ( A) - (iii); (B) - (iv); (C) - (i); (D) - (ii)

    		 d)

    ( A) - (i); (B) - (ii); (C) - (iii); (D) - (iv)
    Chemistry - Co-ordination Compounds Coordination compounds:
    Marked right : 31.085043988269796% students | Marked incorrect : 17.008797653958943% students | Marked not attempted : 51.90615835777126% students
    (Asked in: NEET - 1970)

    Correct Option: c

    View Solution

  17. If a reaction follows the Arrhenius equation, the plot Ink vs \frac{1}{(RT)} gives straight line with a gradient (-y) unit. The energy required to activate the reactant is:
    a)

    -y unit 

    		 b)

    y/R unit 
    c)

    y unit 

    		 d)

    yR unit 
    Chemistry - Chemical kinetics
    Marked right : 21.27659574468085% students | Marked incorrect : 12.5% students | Marked not attempted : 66.22340425531915% students
    (Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

    Correct Option: c

    View Solution

  18. Match the ores (column A) with the metals (column B)

    (Column A )                             (Column B ) 

    Ores                                         Metals

    (I) Siderite                               (a) Zinc 

    (II) Kaolinite                             (b) Copper 

    (III) Malachite                           (c) Iron 

    (Iv) Calamine                            (d) Aluminium 

     
    a)

    (I) - (c); (II) - (d); (iii) - (a); (Iv) - (b)

    		 b)

    (I) - (b); (II) - (c); (iii) - (d); (Iv) - (a)
    c)

    (I) - (c); (II) - (d); (iii) - (b); (Iv) - (a)

    		 d)

    (I) - (a); (II) - (b); (iii) - (c); (Iv) - (d)
    Chemistry - General Principle and process of Isolation of metals General Principles and processes of Isolation Elements
    Marked right : 48.47457627118644% students | Marked incorrect : 10.508474576271185% students | Marked not attempted : 41.01694915254237% students
    (Asked in: NEET - 1970)

    Correct Option: c

    View Solution

  19. The correct match between item (I) and (II) is :

               Item (I)                                         Item (II)

    (A) Norethindrone                          (P) Antibiotic

    (B) Ofloxacin                                (Q) Anti-fertility

    (C) Equanil                                   (R) Hypertension 

                                                       (S)  Analgesics
    a)

    (A)\rightarrow (R) ;(B)\rightarrow (P);(C)\rightarrow (R)

    		 b)

    (A)\rightarrow (Q) ;(B)\rightarrow (P);(C)\rightarrow (R)
    c)

    (A)\rightarrow (Q) ;(B)\rightarrow (R);(C)\rightarrow (S)

    		 d)

    (A)\rightarrow (R) ;(B)\rightarrow (P);(C)\rightarrow (S)