JEE Main 2019 April Question Paper with Answer Key and Solutions

JEE Main 2019 Question Paper All Questions

Chemistry

The regions of the atmosphere, where clouds form and

where we live, respectively, are:

a)	Troposphere and Stratosphere	b)	Stratosphere and Troposphere
c)	Troposphere and Troposphere	d)	Stratosphere and Stratosphere

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

Marked right : 35.25345622119816% students | Marked incorrect : 26.95852534562212% students | Marked not attempted : 37.78801843317972% students

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

Correct Option: c

View Solution

The species that can have a trans-isomer is:

( en = ethane-1,2-diamine, ox = oxalate)

a)	$[Zn(en)Cl_{2}]$	b)	$[Pt(en)Cl_{2}]$
c)	$[Cr(en)_{2}(ox)]^{+}$	d)	$[Pt(en)_{2}Cl_{2}]^{2+}$

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 29.96632996632997% students | Marked incorrect : 11.784511784511785% students | Marked not attempted : 58.24915824915825% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

Ethylamine $(C_{2}H_{5}NH_{2})$ can be obtained from N-ethylphthalimide

on treatment with:

a)	$NH_{2}NH_{2}$	b)	$CaH_{2}$
c)	$NaBH_{4}$	d)	$H_{2}O$

Chemistry - Organic Compounds Containing Nitrogen

Marked right : 22.58953168044077% students | Marked incorrect : 15.702479338842975% students | Marked not attempted : 61.70798898071625% students

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

Correct Option: a

View Solution

The oxoacid of sulphur that does not contain bond between sulphur atoms is:

a)	$H_{2}S_{4}O_{6}$	b)	$H_{2}S_{2}O_{3}$
c)	$H_{2}S_{2}O_{7}$	d)	$H_{2}S_{2}O_{4}$

Chemistry - p- Block Elements

Marked right : 35.46325878594249% students | Marked incorrect : 10.86261980830671% students | Marked not attempted : 53.674121405750796% students

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

Correct Option: c

View Solution

Consider the hydrated ions of $Ti^{2+},V^{2+},Ti^{3+}\: \: and\: \: Sc^{3+}$ .

The correct order of their spin-only magnetic moments is:

a)	$V^{2+}<Ti^{2+}<Ti^{3+}<Sc^{3+}$	b)	$Sc^{3+}<Ti^{3+}<Ti^{2+}<V^{2+}$ Therefore, option (1) is correct.
c)	$Ti^{3+}<Ti^{2+}<Sc^{3+}<V^{2+}$	d)	$Sc^{3+}<Ti^{3+}<V^{2+}<Ti^{2+}$

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 23.29192546583851% students | Marked incorrect : 24.22360248447205% students | Marked not attempted : 52.484472049689444% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

Increasing rate of $S_{N}1$ reaction in the following compounds is :

a)	(A) < (B) < (C) < (D)	b)	(B) < (A) < (C) < (D)
c)	(B) < (A) < (D) < (C)	d)	(A) < (B) < (D) < (C)

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

Marked right : 16.705882352941178% students | Marked incorrect : 16.941176470588236% students | Marked not attempted : 66.3529411764706% students

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

Correct Option: b

View Solution

Amylopectin is composed of :

a)	$\alpha-D-glucose,C_{1}-C_{4}\: \: and\: \: C_{1}-C_{6}\: \: linkages$	b)	$\beta -D-glucose,C_{1}-C_{4}\: \: and\: \: C_{2}-C_{6}\: \: linkages$
c)	$\beta -D-glucose,C_{1}-C_{4}\: \: and\: \: C_{1}-C_{6}\: \: linkages$	d)	$\alpha -D-glucose,C_{1}-C_{4}\: \: and\: \: C_{2}-C_{6}\: \: linkages$

Chemistry - Biomolecules

Marked right : 31.05022831050228% students | Marked incorrect : 18.72146118721461% students | Marked not attempted : 50.2283105022831% students

Correct Option: a

View Solution

A process will be spontaneous at all temperatures if :

a)	$\triangle H<0\: \: and\: \: \triangle S<0$	b)	$\triangle H>0\: \: and\: \: \triangle S<0$
c)	$\triangle H<0\: \: and\: \: \triangle S>0$	d)	$\triangle H>0\: \: and\: \: \triangle S>0$

Chemistry - Chemical Thermodynamics Thermodynamics

Marked right : 38.226299694189606% students | Marked incorrect : 14.678899082568808% students | Marked not attempted : 47.09480122324159% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

Major products of the following reaction are:

a)		b)
c)		d)	$CH_{3}OH\: \: and\: \: HCO_{2}H$

Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Carbonyl Compounds Organic Compounds containing Oxygen Aldehydes, Ketones and Carboxylic Acids

Marked right : 7.447209653092006% students | Marked incorrect : 9.973604826546003% students | Marked not attempted : 82.57918552036199% students

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

Correct Option: c

View Solution

Match the refining methods (Column I) with metals (Column II).

Column I Column II

(Refining methods) Metals)

(I) Liquation (a) Zr

(II) Zone Refining (b) Ni

(III) Mond Process (c) Sn

(IV) Van Arkel Method (d) Ga

a)	(I) - (c); (II) - (a); (III) - (b); (IV) - (d)	b)	(I) - (b); (II) - (c); (III) - (d); (IV) - (a)
c)	(I) - (c); (II) - (d); (III) - (b); (IV) - (a)	d)	(I) - (b); (II) - (d); (III) - (a); (IV) - (c)

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

Marked right : 16.617819460726846% students | Marked incorrect : 6.843493552168815% students | Marked not attempted : 76.53868698710434% students

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

Correct Option: c

View Solution

A gas undergoes physical adsorption on a surface and follows the given Freundlich

adsorption isotherm equation

$\frac{x}{m}=kp^{0.5}$

Adsorption of the gas increases with:

a)	Decrease in p and increase in T	b)	Decrease in p and decrease in T
c)	Increase in p and decrease in T	d)	Increase in p and increase in T

Chemistry - Chemical Kinetics and Surface Chemistry Surface Chemistry Surface Chemistry

Marked right : 41.796875% students | Marked incorrect : 18.619791666666664% students | Marked not attempted : 39.58333333333333% students

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

Correct Option: c

View Solution

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 : 9.550561797752808% students | Marked incorrect : 12.921348314606742% students | Marked not attempted : 77.52808988764045% students

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

Correct Option: b

View Solution

The alloy used in the construction of aircrafts is :

a)	Mg - Al	b)	Mg - Zn
c)	Mg - Sn	d)	Mg - Mn

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

Marked right : 47.524752475247524% students | Marked incorrect : 6.9306930693069315% students | Marked not attempted : 45.54455445544555% students

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

Correct Option: a

View Solution

The graph between $\left | \psi \right |^{2}$ and r ( radial distance ) is shown below.

This represents :

a)	3s orbital	b)	2s orbital
c)	1s orbital	d)	2p orbital

Chemistry - Atomic Structure Atomic Structure

Marked right : 28.47682119205298% students | Marked incorrect : 13.245033112582782% students | Marked not attempted : 58.27814569536424% students

(Asked in: BITSAT - 1970)

Correct Option: b

View Solution

The synonym for water gas when used in the production of methanol is:

a)	natural gas	b)	fuel gas
c)	laughing gas	d)	syn gas

Chemistry - Hydrogen and s-block Elements Hydrogen and its compound Hydrogen Hydrogen

Marked right : 16.794491894718494% students | Marked incorrect : 12.750566498169775% students | Marked not attempted : 70.45494160711173% students

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

Correct Option: d

View Solution

Three complexes, $[CoCl(NH_{3})_{5}]^{2+} (I)$ , $[Co(NH_{3})_{5}H_{2}O]^{3+} (II)$ and

$[Co(NH_{3})_{6}]^{3+} (III)$ absorb light in the visible region.

The correct order of the wavelength of light absorbed by them is:

a)	(III) > (I) > (II)	b)	(III) > (II) > (I)
c)	(II) > (I) > (III)	d)	(I) > (II) > (III)

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 14.61794019933555% students | Marked incorrect : 17.275747508305646% students | Marked not attempted : 68.10631229235881% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

A bacterial infection in an internal wound grows as $N{}'(t)=N_{o}exp(t)$ ,

where the time t is in hours. A dose of antibiotic, taken orally, needs 1 hour to reach the wound.

Once it reaches there, the bacterial population goes down as $\frac{dN}{dt}=-5N^{2}$ .

What will be the plot of $\frac{N_{o}}{N}$ vs. t after 1 hour ?

a)		b)
c)		d)

Chemistry - Chemical Kinetics and Surface Chemistry Chemical kinetics

Marked right : 21.07843137254902% students | Marked incorrect : 15.196078431372548% students | Marked not attempted : 63.725490196078425% students

(Asked in: BITSAT - 1970)

Correct Option: c

View Solution

The correct order of catenation is:

a)	C > Sn > Si $\approx$ Ge	b)	C > Si > Ge $\approx$ Sn
c)	Si > Sn > C > Ge	d)	Ge > Sn > Si > C

Chemistry - p- d- and f-block elements p-block elements -group 14 (Carbon family) p- Block Elements Some p-Block elements

Marked right : 14.00323566420996% students | Marked incorrect : 12.870753190724429% students | Marked not attempted : 73.12601114506562% students

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

Correct Option: b

At room temperature, a dilute solution of urea is prepared by dissolving 0.60g of urea in 360 g of water. If the vapour pressure of pure water at this temperature is 35 mmHg, lowering of vapour pressure(in mmHg) will be:

(molar mass of urea = 60g/mol)

a)	0.017	b)	0.028
c)	0.027	d)	0.031

Chemistry - Solutions

Marked right : 22.89156626506024% students | Marked incorrect : 10.240963855421686% students | Marked not attempted : 66.86746987951807% students

(Asked in: NEET - 1970)

Correct Option: a

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 : 7.961783439490445% students | Marked incorrect : 22.611464968152866% students | Marked not attempted : 69.42675159235668% students

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

Correct Option: a

View Solution

The major product of the following reaction is :

a)		b)
c)		d)

Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes

Marked right : 12.433392539964476% students | Marked incorrect : 28.063943161634104% students | Marked not attempted : 59.50266429840142% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

Consider the following table :

Gas $a/(k\: \: Pa \: \: dm^{6}\: \: mol^{-1})$ $b/(\: \: dm^{3}\: \: mol^{-1})$

A 642.32 0.05196

B 155.21 0.04136

C 431.91 0.05196

D 155.21 0.4382

a and b are van der Waals constants. The correct statement about the gases is :

Gas C will occupy more volume than gas A;

gas B will be more compressible than gas D

Gas C will occupy lesser volume than gas A;

gas B will be lesser compressible than gas D

Gas C will occupy more volume than gas A;

gas B will be lesser compressible than gas D

Gas C will occupy lesser volume than gas A;

gas B will be more compressible than gas D

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

Marked right : 14.444444444444443% students | Marked incorrect : 13.88888888888889% students | Marked not attempted : 71.66666666666667% students

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

Correct Option: a

View Solution

Consider the statements S1 and S2 :

S1 : Conductivity always increases with decrease in the concentration of electrolyte.

S2 : Molar conductivity always increases with decrease in the concentration of electrolyte.

The correct option among the following is :

a)	Both S1 and S2 are wrong	b)	S1 is wrong and S2 is correct
c)	Both S1 and S2 are correct	d)	S1 is correct and S2 is wrong

Chemistry - Redox Reaction and Electrochemistry

Marked right : 36.32075471698113% students | Marked incorrect : 18.632075471698112% students | Marked not attempted : 45.04716981132076% students

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

Correct Option: b

View Solution

Consider the following statements:

(a) The pH of a mixture containing 400mL of 0.1 M H₂SO₄and 400ml of 0.1M NaOH will be approximately 1.3.

(b) Ionic product of water is temperature dependent.

(d) The Le Chatelier's principle is not applicable to common-ion effect.

The correct statements are :

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

Chemistry - Physical and Chemical Equilibria Equilibrium Equilibrium

Marked right : 17.16101694915254% students | Marked incorrect : 22.88135593220339% students | Marked not attempted : 59.95762711864406% students

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

Correct Option: b

The principle of column chromatography is:

a)	Gravitational force	b)	Capillary action
c)	Differential absorption of the substances on the solid phase.	d)	Differential adsorption of the substances on the solid phase.

Chemistry - Chemical Kinetics and Surface Chemistry Surface Chemistry Surface Chemistry

Marked right : 36.55778894472362% students | Marked incorrect : 26.758793969849247% students | Marked not attempted : 36.68341708542713% students

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

Correct Option: d

View Solution

The isoelectronic set of ions is :

a)	$N^{3-}, O^{2-},F^{-} \: \: and \: \: Na^{+}$	b)	$N^{3-}, Li^{+},Mg^{2+} \: \: and \: \: O^{2-}$
c)	$F^{-},Li^{+}, Na^{+} \: \: and \: \: Mg^{2+}$	d)	$Li^{+},Na^{+},O^{2-} \: \: and \: \:F^{-}$

Chemistry - Classification of elements and periodicity in properties Classification of Elements and Periodic table

Marked right : 48.69791666666667% students | Marked incorrect : 8.59375% students | Marked not attempted : 42.70833333333333% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

Which of the following is a condensation polymer?

a)	Buna - S	b)	Neoprene
c)	Teflon	d)	Nylon 6,6

Chemistry - Polymers Polymers

Marked right : 15.112354926331387% students | Marked incorrect : 15.458062391966418% students | Marked not attempted : 69.4295826817022% students

(Asked in: NEET - 1970,) (Asked in: TS EAMCET - 1970)

Correct Option: d

View Solution

At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of $O_{2}$ for complete combustion, and 40 mL of $CO_{2}$ is formed. The formula of the hydrocarbon is:

a)	$C_{4}H_{10}$	b)	$C_{4}H_{6}$
c)	$C_{4}H_{7}Cl$	d)	$C_{4}H_{8}$

Chemistry - Some basic concepts in chemistry

Marked right : 12.026956972524625% students | Marked incorrect : 10.419906687402799% students | Marked not attempted : 77.55313634007258% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is:

a)	II < I < III	b)	III < II < I
c)	III < I < II	d)	I < III < II

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

Marked right : 4.788455231223352% students | Marked incorrect : 9.576910462446705% students | Marked not attempted : 85.63463430632994% students

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

Correct Option: c

View Solution

During the change of $O_{2}$ to $O_{2}^{-}$ , the incoming electron goes to the orbital :