JEE Main 2019 April Question Paper with Answer Key and Solutions

JEE Main 2019 Question Paper All Questions

Chemistry

A plane is inclined at an angle $\alpha =30^{0}$ with respect to the horizontal. A particle is projected with a speed $u=2ms^{-1}$ from the base of the plane , making an angle $\theta =15^{0}$ With respect to the plane as shown in the figure . The distance from the base ,at which the particle hits the plane is close to: $\left ( Take \, \, g=10ms^{-2} \right )$

a)	$20cm$	b)	$18cm$
c)	$26cm$	d)	$14cm$

Chemistry -

Marked right : 15.2% students | Marked incorrect : 8.799999999999999% students | Marked not attempted : 76.0% students

Correct Option: a

Number of stereo centres present in the linear structure are X and cyclic structures of glucose are Y :

then write answer XY.

(if x=30, y= 10 then answer XY will be 3010).

a)	54	b)	44
c)	55	d)	45

Chemistry - Organic Compounds containing Halogens Biomolecules Haloalkanes and Haloarenes

Marked right : 27.37226277372263% students | Marked incorrect : 12.773722627737227% students | Marked not attempted : 59.854014598540154% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The $pH$ of a $0.02 \; M\; NH_{4}Cl$ solution will be $[$ given $K_{b}\left ( NH_{4}OH \right )=10^{-5}$ and $log\; 2=0.301$ $]$

(Response should be upto only two decimal digit like 78.78 or 0.08).

a)	2.65	b)	4.35
c)	4.65	d)	5.35

Chemistry - Physical and Chemical Equilibria Equilibrium Equilibrium

Marked right : 11.76470588235294% students | Marked incorrect : 10.407239819004525% students | Marked not attempted : 77.82805429864254% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: d

View Solution

The major product $'Y'$ in the following reaction is :

a)		b)
c)		d)

Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes

Marked right : 16.50485436893204% students | Marked incorrect : 19.57928802588997% students | Marked not attempted : 63.915857605178% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

Which of the following is NOT a correct method of the preparation of benzylamine from cyanobenzene ?

a)	$H_{2}/Ni$	b)	$(i)\; \; LiAlH_{4}\; \; (ii)\; H_{3}O^{+}$
c)	$(i)\; SnCl_{2}+HCl\left ( gas \right )\; \; \; (ii)\; NaBH_{4}$	d)	$(i)\; HCl/H_{2}O\; \; (ii)\; NaBH_{4}$

Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Organic Compounds Containing Nitrogen Organic Compounds Containing Nitrogen

Marked right : 28.730158730158728% students | Marked incorrect : 24.285714285714285% students | Marked not attempted : 46.98412698412698% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: d

View Solution

The highest possible oxidation states of uranium and plutonium, respectively, are :

a)	$6\; and \; 7$	b)	$6\: and\: 4$
c)	$7\: and\: 6$	d)	$4\: and\: 6$

Chemistry - p- d- and f-block elements d - and f - BLOCK ELEMENTS d and f Block Elements

Marked right : 28.27586206896552% students | Marked incorrect : 11.264367816091953% students | Marked not attempted : 60.45977011494252% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

A hydrated solid $X$ on heating initially gives a monohydrated compound $Y.$ $Y$ upon heating above $373\; K$ leads to an anhydrous white powder $Z \; .$ $X$ and $Z \;$ respectively are :

a)	Washing soda and soda ash.	b)	Baking soda and dead burnt plaster
c)	Washing soda and dead burnt plaster.	d)	Baking soda and soda ash.

Chemistry - Hydrogen and s-block Elements S - Block Elements (Alkali and Alkaline Earth Metals) s- Block Elements ( Alkali and Alkaline earth metals )

Marked right : 29.583333333333332% students | Marked incorrect : 16.041666666666668% students | Marked not attempted : 54.37499999999999% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The correct order of the first ionization enthalpies is :

a)	$Ti< Mn< Zn< Ni$	b)	$Ti< Mn< Ni< Zn$
c)	$Mn< Ti< Zn< Ni$	d)	$Zn< Ni< Mn< Ti$

Chemistry - p- d- and f-block elements Classification of elements and periodicity in properties Classification of Elements and Periodic table d - and f - BLOCK ELEMENTS d and f Block Elements

Marked right : 43.02325581395349% students | Marked incorrect : 16.701902748414376% students | Marked not attempted : 40.27484143763213% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: b

View Solution

The correct statements among (a) to (d) are :

(a) saline hydrides produce $H_{2}$ gas when reacted with $H_{2}O.$

(b) reaction of $LiAlH_{4}$ with $BF_{3}$ leads to $B_{2}H_{6}.$

(d) $HF$ and $CH_{4}$ are called molecular hydrides.

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

Chemistry - Hydrogen and s-block Elements Hydrogen Hydrogen

Marked right : 28.258064516129032% students | Marked incorrect : 26.064516129032256% students | Marked not attempted : 45.67741935483871% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are :

a)	Lymen and Paschen	b)	Balmer and Brackett
c)	Brackett and Pfund	d)	Paschen and Pfund

Chemistry - Atomic Structure

Marked right : 33.415841584158414% students | Marked incorrect : 9.900990099009901% students | Marked not attempted : 56.683168316831676% students

(Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The correct statement is :

a)	aniline is a froth stabilizer.	b)	zincite is a carbonate ore.
c)	sodium cyanide cannot be used in the metallurgy of silver.	d)	zone refining process cannot be used for the refining of titanium.

Chemistry - General Principle and process of Isolation of metals General Principles and processes of Isolation Elements

Marked right : 43.32129963898917% students | Marked incorrect : 16.064981949458485% students | Marked not attempted : 40.61371841155235% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

The increasing order of nucleophilicity of the following nucleophiles is :

$(a)\; CH_{3}CO_{2}^{\ominus }$

$(b)\; H_{2}O$

$(c)\; CH_{3}SO_{3}^{\ominus }$

$(d)\;\overset{\ominus }{O}H$

a)	$(a)< (d)< (c)< (b)$	b)	$(b)< (c)< (d)< (a)$
c)	$(d)< (a)< (c)< (b)$	d)	$(b)< (c)< (a)< (d)$

Chemistry - Principles of Organic Chemistry and Hydrocarbons Some Basic Principles of Organic Chemistry Organic Chemistry - some Basic principles and techniques

Marked right : 22.58064516129032% students | Marked incorrect : 17.634408602150536% students | Marked not attempted : 59.78494623655914% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: d

View Solution

The correct option among the following is :

a)	Colloidal medicines are more effective because they have small surface area.	b)	Addition of alum to water makes it unfit for drinking .
c)	Colloidal particles in lyophobic sols can be precipitated by electrophoresis.	d)	Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.

Chemistry - Surface Chemistry Surface Chemistry

Marked right : 11.969380654140572% students | Marked incorrect : 12.178148921363952% students | Marked not attempted : 75.85247042449548% students

(Asked in: NEET - 1970,) (Asked in: COMEDK UGET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: c

View Solution

Which one of these factors does not effect the stability of conformation in acyclic compounds?

a)	Steric interaction	b)	Torsional strain
c)	Electrostatic forces of interaction	d)	Angle strain

Chemistry - Some Basic Principles of Organic Chemistry

Marked right : 26.576576576576578% students | Marked incorrect : 22.07207207207207% students | Marked not attempted : 51.35135135135135% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: d

View Solution

In Chromatography, which of the following statements is INCORRECT for $R_{f}$ ?

a)	$R_{f}$ value depends on the type of chromatography.	b)	The value of $R_{f}$ can not be more than one.
c)	Higher $R_{f}$ value means higher adsorption.	d)	$R_{f}$ value is dependent on the mobile phase.

Chemistry - Theoretical Principles of Experimental Chemistry Purification and Characterisation of Organic Compounds Principles Related to Practical Chemistry Organic Chemistry - some Basic principles and techniques

Marked right : 9.233406808719078% students | Marked incorrect : 7.200587803085965% students | Marked not attempted : 83.56600538819495% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: c

View Solution

The crystal field stabilization energy (CFSE) of $\left [ Fe\left ( H_{2}O \right )_{6} \right ]Cl_{2}$ and $K_{2}\left [ NiCl_{4} \right ]$ , respectively, are :

a)	$-0.6\Delta _{0} \; and\; -0.8\Delta _{t}$	b)	$-0.4\Delta _{0}\; and\; -0.8\Delta _{t}$
c)	$-2.4\Delta _{0}\; and\; -1.2\Delta _{t}$	d)	$-0.4\Delta _{0}\; and\; -1.2\Delta _{t}$

Chemistry - p- d- and f-block elements d - and f - BLOCK ELEMENTS Co-ordination Compounds d and f Block Elements Coordination compounds:

Marked right : 17.68595041322314% students | Marked incorrect : 12.396694214876034% students | Marked not attempted : 69.91735537190083% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: b

View Solution

The difference between $\Delta H$ and $\Delta U$ $\left ( \Delta H-\Delta U \right )$ , when the combustion of one mole of heptane is carried out at a temperature T, (in terms of RT) is equal to:

(Response should be in integer with sign like -2 or +3).

a)	-4	b)	-3
c)	4	d)	3

Chemistry - Chemical Thermodynamics Thermodynamics

Marked right : 8.974358974358974% students | Marked incorrect : 12.454212454212454% students | Marked not attempted : 78.57142857142857% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

Which one of the following graphs between molar conductivity $\left ( \wedge _{m} \right )$ versus $\sqrt{C}$ is correct?

a)		b)
c)		d)

Chemistry - Electrochemistry Redox Reaction and Electrochemistry Electrochemistry

Marked right : 23.91304347826087% students | Marked incorrect : 15.869565217391305% students | Marked not attempted : 60.21739130434782% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The correct match between Item - $I$ and Item - $II$ is :

	Item - I		Item-II
(a)	Highest density polythene	(I)	Peroxide catalyst
(b)	Polyacrylonitrile	(II)	Condensation at high temperature & pressure
(c)	Novolac	(III)	Ziegler-Natta Catalyst
(d)	Nylon 6	(IV)	Acid or base catalyst

a)	$(a)\rightarrow (IV),(b)\rightarrow (II),(c)\rightarrow (I),(d)\rightarrow (III)$	b)	$(a)\rightarrow (II),(b)\rightarrow (IV),(c)\rightarrow (I),(d)\rightarrow (III)$
c)	$(a)\rightarrow (III),(b)\rightarrow (I),(c)\rightarrow (II),(d)\rightarrow (IV)$	d)	$(a)\rightarrow (III),(b)\rightarrow (I),(c)\rightarrow (IV),(d)\rightarrow (II)$

Chemistry - Polymers Polymers

Marked right : 10.057315886233372% students | Marked incorrect : 7.916080891099816% students | Marked not attempted : 82.02660322266682% students

(Asked in: NEET - 1970,) (Asked in: MET - 1970)

Correct Option: d

View Solution

Points $I,II$ and $III$ in the following plot respectively correspond to

$\left ( V_{mp}:$ most probable velocity $)$

$V_{mp} \; of\; N_{2}\left ( 300\; K \right )\: <\: V_{mp} \; of\; O_{2}\left ( 400\; K \right )\: <\: V\; _{mp}\; of \; H_{2}\; \left ( 300K \right )$

$V_{mp} \; of\; O_{2}\left ( 400\; K \right )<V_{mp} \; of\; N_{2}\left ( 300\; K \right )<V\; _{mp}\; of \; H_{2}\; \left ( 300K \right )$

$V_{mp} \; of\; N_{2}\left ( 300\; K \right )<V_{mp} \; of\; H_{2}\left ( 300\; K \right )<V\; _{mp}\; of \; O_{2}\; \left ( 400K \right )$

$V_{mp} \; of\; H_{2}\left ( 300\; K \right )<V_{mp} \; of\; N_{2}\left ( 300\; K \right )<V\; _{mp}\; of \; O_{2}\; \left ( 400K \right )$

Chemistry - States of Matter States of matter States of Matter : Gases and liquids

Marked right : 19.15367483296214% students | Marked incorrect : 15.14476614699332% students | Marked not attempted : 65.70155902004454% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The major product obtained in the given reaction is :

a)		b)
c)		d)

Chemistry - Principles of Organic Chemistry and Hydrocarbons Hydrocarbons Organic Compounds containing Halogens Hydrocarbons Haloalkanes and Haloarenes

Marked right : 8.323959505061868% students | Marked incorrect : 5.410573678290214% students | Marked not attempted : 86.26546681664792% students

(Asked in: NEET - 1970,) (Asked in: MET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: c

View Solution

The minimum amount of $O_{2}\left ( g \right )$ consumed per gram of reactant is for the reaction :

(Given atomic mass : $Fe=56,$ $O=16$ , $Mg=24,P=31,C=12,H=1$ )

a)	$4Fe\left ( s \right )+3O_{2}\left ( g \right )\rightarrow 2Fe_{2}O_{3}\left ( s \right )$	b)	$P_{4}\left ( s \right )+5O_{2}\left ( g \right )\rightarrow P_{4}O_{10}\left ( s \right )$
c)	$C_{3}H_{8}\left ( g \right )+5O_{2}\left ( g \right )\rightarrow 3CO_{2}\left ( g \right )+4H_{2}O\left ( I \right )$	d)	$2Mg\left ( s \right )+O_{2}\left ( g \right )\rightarrow 2MgO\left ( s \right )$

Chemistry - Some basic concepts in chemistry

Marked right : 9.238095238095239% students | Marked incorrect : 14.857142857142858% students | Marked not attempted : 75.90476190476191% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

For the reaction ,

$2SO_{2}\left ( g \right )+O_{2}\left ( g \right )\rightleftharpoons 2SO_{3}\left ( g \right ),$

$\Delta H=-57.2\; kJ\; mol^{-1}\; and$

$K_{c}=1.7\times 10^{16}.$

Which of the following statement is INCORRECT ?

a)	The equilibrium constant is large suggestive of reaction going to completion and so no catalyst is required .	b)	The equilibrium will shift in forward direction as the pressure increases.
c)	The equilibrium constant decreases as the temperature increases.	d)	The addition of inert gas at constant volume will not affect the equilibrium constant.

Chemistry - Physical and Chemical Equilibria Chemical Thermodynamics Equilibrium Thermodynamics Equilibrium

Marked right : 17.313915857605178% students | Marked incorrect : 19.25566343042071% students | Marked not attempted : 63.43042071197411% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

$1\; g$ of a non-volatile non-electrolyte solute is dissolved in $100 \; g$ of two different solvents $A$ and $B$ whose ebulliscopic constants are in the ratio of $1:5$ . The ratio of the elevation in their boiling points, $\frac{\Delta T_{b}\left ( A \right )}{\Delta T_{b}\left ( B \right )},$ is:

a)	$5:1$	b)	$10:1$
c)	$1:5$	d)	$1:0.2$

Chemistry - Solutions

Marked right : 31.712962962962965% students | Marked incorrect : 6.25% students | Marked not attempted : 62.03703703703704% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

For the reaction of $H_{2}$ with $I_{2}$ , the rate constant is $2.5\times 10^{-4}dm^{3}mol^{-1}s^{-1}$ at $327^{\circ}C$ and $1.0\; dm^{3}mol^{-1}s^{-1}$ at $527^{\circ}C.$ The activation energy for the reaction, in $KJmol^{-1}$ is :

$\left ( R=8.314\; J\; K^{-1} mol^{-1}\right )$

(Response should be in integer only like 78 or 560).

a)	168	b)	150
c)	72	d)	59

Chemistry - Chemical Kinetics and Surface Chemistry Chemical kinetics

Marked right : 5.907626208378089% students | Marked incorrect : 26.852846401718583% students | Marked not attempted : 67.23952738990333% students

(Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The INCORRECT statement is :

the gemstone,ruby,has $Cr^{3+}$ ions occupying the octahedral sites of beryl.

the spin-only magnetic moment of $\left [ Ni\left ( NH_{3} \right ) _{4}\left ( H_{2}O \right )_{2}\right ]^{2+}$ is $2.83\; BM.$

the color of $\left [ CoCl\left ( NH_{3} \right ) _{5}\right ]^{2+}$ is violet as it absorbs the yellow light.

the spin-only magnetic moments of $\left [ Fe\left ( H_{2}O \right ) _{6}\right ]^{2+}$ and $\left [ C_{r}\left ( H_{2}O \right ) _{6}\right ]^{2+}$ are nearly similar.

Chemistry - p- d- and f-block elements d - and f - BLOCK ELEMENTS d and f Block Elements

Marked right : 15.36231884057971% students | Marked incorrect : 22.318840579710145% students | Marked not attempted : 62.31884057971014% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: a

View Solution

Compound $A\left ( C_{9}H_{10}O \right )$ shows positive iodoform test. Oxidation of $A$ with $KMnO_{4}/KOH$ gives acid $B\left ( C_{8}H_{6}O_{4} \right ).$ Anhydride of $B$ is used for the preparation of phenolphthalein. Compound $A$ 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 : 21.934369602763386% students | Marked incorrect : 15.198618307426598% students | Marked not attempted : 62.86701208981002% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: d

View Solution

The number of pentagons in $C_{60}$ are x and trigons (triangles) in white phosphorus are y, then write answer xy.

(if x=30, y= 1 then answer xy will be 301).

a)	203	b)	124
c)	123	d)	204

Chemistry - p- Block Elements

Marked right : 33.98328690807799% students | Marked incorrect : 12.256267409470752% students | Marked not attempted : 53.760445682451255% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: b

View Solution

Air pollution that occurs in sunlight is:

a)	reducing smog	b)	acid rain
c)	oxidising smog	d)	fog

Chemistry - Biological , Industrial and Environmental chemistry Environmental Chemistry Environmental Chemistry

Marked right : 50.83532219570406% students | Marked incorrect : 15.632458233890215% students | Marked not attempted : 33.53221957040573% students

(Asked in: NEET - 1970,) (Asked in: BITSAT - 1970)

Correct Option: c

View Solution

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10th April Slot 2

Analysis of JEE Main Paper 2019

JEE Main 2019 Question Paper All Questions