JEE Main 2019 April Question Paper with Answer Key and Solutions

JEE Main 2019 Question Paper All Questions

Chemistry

The correct sequence of thermal stability of the following carbonates is:

$MgCO_{3}< CaCO_{3}< SrCO_{3}< BaCO_{3}$

$BaCO_{3}< SrCO_{3}< CaCO_{3}< MgCO_{3}$

$MgCO_{3}< SrCO_{3}< CaCO_{3}< BaCO_{3}$

$BaCO_{3}< CaCO_{3}<SrCO_{3}< MgCO_{3}$

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

Marked right : 32.581453634085214% students | Marked incorrect : 16.040100250626566% students | Marked not attempted : 51.37844611528822% students

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

Correct Option: a

View Solution

The correct statement among the following is :

$\left ( SiH_{3} \right )_{3}N$ is pyramidal and less basic than $\left (CH_{3} \right )_{3}N$ .

$\left ( SiH_{3} \right )_{3}N$ is planar and less basic than $\left (CH_{3} \right )_{3}N$ .

$\left ( SiH_{3} \right )_{3}N$ is planar and more basic than $\left (CH_{3} \right )_{3}N$ .

$\left ( SiH_{3} \right )_{3}N$ is pyramidal and more basic than $\left (CH_{3} \right )_{3}N$ .

Chemistry - p- d- and f-block elements p- Block Elements Some p-Block elements

Marked right : 16.27906976744186% students | Marked incorrect : 17.732558139534884% students | Marked not attempted : 65.98837209302324% students

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

Correct Option: b

View Solution

The electrons are more likely to be found:

a)	in the region a and c	b)	in the region a and b
c)	only in the region a	d)	only in the region c

Chemistry - Atomic Structure Atomic Structure

Marked right : 42.94234592445328% students | Marked incorrect : 11.928429423459244% students | Marked not attempted : 45.12922465208747% students

(Asked in: BITSAT - 1970)

Correct Option: a

View Solution

What is the molar solubility of $Al\left ( OH \right )_{3}$ in $0.2M\: \: \: \: NaOH$ solution? Given that, solubility product of $Al\left ( OH \right )_{3}=2.4\times 10^{-24}:$

a)		b)
c)		d)

Chemistry - Solutions Solutions

Marked right : 18.911174785100286% students | Marked incorrect : 9.455587392550143% students | Marked not attempted : 71.63323782234957% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

Gven :

$Co^{3+}+ e^{-}\rightarrow Co^{2+}+;E^{0}=+1.81V$

$Pb^{4+}+2 e^{-}\rightarrow Pb^{2+}+;E^{0}=+1.67V$

$Ce^{4+}+ e^{-}\rightarrow Ce^{3+}+;E^{0}=+1.61V$

$Bi ^{3+}+ 3e^{-}\rightarrow Bi;E^{0}=+0.20 V$

Oxidising power of the species will increase in the order:

a)	$Bi^{3+}< Ce^{4+}< Pb^{4+}< Co^{3+}$	b)	$Ce^{4+}< Pb^{4+}< Bi^{3+}< Co^{3+}$
c)	$Co^{3+}< Ce^{4+}< Bi^{3+}< Pb^{4+}$	d)	$Co^{3+}< Pb^{4+}< Ce^{4+}< Bi^{3+}$

Chemistry - Redox Reaction and Electrochemistry

Marked right : 36.1890694239291% students | Marked incorrect : 14.47562776957164% students | Marked not attempted : 49.33530280649926% students

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

Correct Option: a

View Solution

An organic compound 'A' is oxidized with $Na_{2}O_{2}$ followed by boiling with $HNO_{3}$ . The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate.

Based on above observation, the element present in the given compound is :

a)	Sulphur	b)	Nitrogen
c)	Phosphorus	d)	Fluorine

Chemistry - p- d- and f-block elements p- Block Elements Some p-Block elements

Marked right : 23.36182336182336% students | Marked incorrect : 16.80911680911681% students | Marked not attempted : 59.82905982905983% students

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

Correct Option: c

View Solution

Enthalpy of sublimation of iodine is $24calg^{-1}$ at $200^{\circ}C$ . If specific heat of $I_{2}\left ( s \right )$ and $I_{2}\left ( vap \right )$ are $0.055$ and $0.031calg^{-1}K^{-1}$ respectively, then enthalpy of sublimation of iodine at $250^{\circ}C$ in $cal\: g^{-1}$ is :

a)	2.85	b)	22.8
c)	5.7	d)	11.4

Chemistry - Chemical Thermodynamics

Marked right : 0.7210575510749099% students | Marked incorrect : 1.2284684203498466% students | Marked not attempted : 98.05047402857524% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

In the following reaction; $xA\rightarrow yB$

$\log_{10}\left [ -\frac{d\left [ A \right ]}{dt} \right ]=\log_{10}\left [ \frac{d\left [ B \right ]}{dt} \right ]+0.3010$

'A' and 'B' respectively can be :

a)	$N_2O_4$ and $NO_2$	b)	$C_2H_4$ and $C_4H_8$ 92933
c)	$C_2H_2$ and $C_6H_6$	d)	n-Butane and Iso-butane92933

Chemistry - Chemical Kinetics and Surface Chemistry Chemical kinetics

Marked right : 26.16279069767442% students | Marked incorrect : 15.69767441860465% students | Marked not attempted : 58.139534883720934% students

(Asked in: BITSAT - 1970)

Correct Option: b

View Solution

Which of the following is a thermosetting polymer?

a)	PVC	b)	Nylon 6
c)	Buna-N	d)	Bakelite

Chemistry - Polymers Polymers Polymers

Marked right : 17.439779766001376% students | Marked incorrect : 9.346180316586373% students | Marked not attempted : 73.21403991741225% students

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

Correct Option: d

View Solution

The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is:

$\left [ Co\left ( phen \right ) _{3}\right ]^{2+}$

$\left [ Zn\left ( phen \right ) _{3}\right ]^{2+}$

$\left [ Fe\left ( phen \right ) _{3}\right ]^{2+}$

$\left [ Ni\left ( phen \right ) _{3}\right ]^{2+}$

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 12.218649517684888% students | Marked incorrect : 14.14790996784566% students | Marked not attempted : 73.63344051446946% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

The mole fraction of a solvent in aqueous solution of a solute is $0.8.$ The molality of the aqueous solution is :

a)	0.1388	b)	0.01388
c)	1.388	d)	13.88

Chemistry - Some basic concepts in chemistry

Marked right : 8.159564823209429% students | Marked incorrect : 10.698096101541251% students | Marked not attempted : 81.14233907524931% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The correct set of species responsible for the photochemical smog is:

$NO,NO_2,O_3\: \: \: \: and\: \: \:hydrocarbons$

$N_2,NO_2,\: \: and\: \: \:hydrocarbons$

$N_2,O_2,O_3\: \: and\: \: \:hydrocarbons$

$CO_2,NO_2,SO_2\: \: and\: \: \:hydrocarbons$

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

Marked right : 40.7488986784141% students | Marked incorrect : 15.418502202643172% students | Marked not attempted : 43.83259911894273% students

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

Correct Option: a

View Solution

The major product of the following addition reaction is

$CH_3-CH=CH_2\overset{Cl_2/H_2O}{\rightarrow}$

$H_3-CH-CH_2$

$\mid$ $\mid$

$Cl$ $OH$

$HC_3-CH-CH_2$

$\mid$ $\mid$

$OH$ $Cl$

Chemistry - Principles of Organic Chemistry and Hydrocarbons Hydrocarbons Hydrocarbons

Marked right : 12.973369166870267% students | Marked incorrect : 10.310285853896897% students | Marked not attempted : 76.71634497923283% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The increasing order of the $pK_b$ of the following compound is :

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

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

Marked right : 17.223650385604113% students | Marked incorrect : 16.966580976863753% students | Marked not attempted : 65.80976863753213% students

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

Correct Option: d

View Solution

$5\: moles$ of $AB_2$ weigh $125\times 10^{-3}kg$ and $10\: moles$ of $A_2B_2$ weigh $300\times 10^{-3}kg.$ The molar mass of $A(M_A)$ and molar mass of $B(M_B)$ in $kg\: mol^{-1}$ are :

$M_A=50\times 10^{-3}\: \: and\: \: M_B=25\times 10^{-3}$

$M_A=25\times 10^{-3}\: \: and\: \: M_B=50\times 10^{-3}$

$M_A=5\times 10^{-3}\: \: and\: \: M_B=10\times 10^{-3}$

$M_A=10\times 10^{-3}\: \: and\: \: M_B=5\times 10^{-3}$

Chemistry - Basic concepts of Chemistry Some basic concepts in chemistry

Marked right : 17.783618046430135% students | Marked incorrect : 9.76784932106877% students | Marked not attempted : 72.4485326325011% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following splitting patterns? ( relative orbital energies not on scale).

a)		b)
c)		d)

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 17.55485893416928% students | Marked incorrect : 12.852664576802509% students | Marked not attempted : 69.59247648902821% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

The major product(s) obtained in the following reaction is/ are:

The products are:

a)		b)
c)		d)

Chemistry - Principles of Organic Chemistry and Hydrocarbons Hydrocarbons Hydrocarbons

Marked right : 19.08256880733945% students | Marked incorrect : 20.91743119266055% students | Marked not attempted : 60.0% students

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

Correct Option: d

View Solution

An ideal gas is allowed to expand from 1L to 10L against a constant external pressure of 1 bar. The work done in kJ is :

a)	10	b)	-9
c)	-2	d)	-0.9

Chemistry - Chemical Thermodynamics

Marked right : 13.717693836978132% students | Marked incorrect : 21.669980119284293% students | Marked not attempted : 64.61232604373758% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

Which of the following statements is not true about RNA?

a)	It controls the synthesis protein	b)	It usually does not replicate
c)	It has always double stranded $\alpha$ -helix structure	d)	It is present in the nucleus of the cell.

Chemistry - Biomolecules Biomolecules

Marked right : 12.996219281663516% students | Marked incorrect : 6.1672967863894135% students | Marked not attempted : 80.83648393194707% students

(Asked in: KEAM - 1970)

Correct Option: c

View Solution

The basic structural unit of feldspar, zeolites, mica, and asbestos is :

a)	$(SiO_{3})^{2-}$	b)	$SiO_{2}$
c)	$(SiO_{4})^{4-}$	d)

Chemistry - p- d- and f-block elements p- Block Elements Some p-Block elements

Marked right : 25.0% students | Marked incorrect : 17.46987951807229% students | Marked not attempted : 57.53012048192772% students

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

Correct Option: c

View Solution

But-2-ene on reaction with alkaline $KMnO_{4}$ at elevated temperature followed by acidification will give:

a)	$2$ molecules of $CH_{3}COOH$	b)	$2$ molecules of $CH_{3}CHO$
c)	one molecule of $CH_{3}CHO$ and one molecule of $CH_{3}COOH$	d)

Chemistry - Principles of Organic Chemistry and Hydrocarbons Hydrocarbons Hydrocarbons

Marked right : 28.406466512702078% students | Marked incorrect : 17.782909930715935% students | Marked not attempted : 53.81062355658198% 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 - Carboxylic Acids and their derivatives Organic Compounds containing Oxygen

Marked right : 2.3301447142506744% students | Marked incorrect : 6.5244051999018895% students | Marked not attempted : 91.14545008584743% students

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

Correct Option: c

View Solution

The group number, number of valence electrons, and valency of an element with atomic number 15, respectively are:

a)	$15,5$ and $3$	b)	$16,6$ and $3$
c)	$16,5$ and $2$	d)	$15,6$ and $2$

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

Marked right : 54.888888888888886% students | Marked incorrect : 5.777777777777778% students | Marked not attempted : 39.33333333333333% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y respectively, are :

a)	washer woman and concentration	b)	fisher man and reduction
c)	washer man and reduction	d)	fisher woman and concentration

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

Marked right : 50.171232876712324% students | Marked incorrect : 9.58904109589041% students | Marked not attempted : 40.23972602739726% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

Glucose and Galactose are having identical configuration in all the positions except position.

a)	$C-2$	b)	$C-5$
c)	$C-3$	d)	$C-4$

Chemistry - Biomolecules

Marked right : 44.73684210526316% students | Marked incorrect : 17.36842105263158% students | Marked not attempted : 37.89473684210527% students

Correct Option: d

View Solution

Peptization is a :

a)	process of bringing colloidal molecule into solution	b)	process of converting soluble particles to form colloidal solution
c)	process of converting precipitate into colloidal solution	d)	process of converting a colloidal solution into precipitate

Chemistry - Chemical Kinetics and Surface Chemistry Surface Chemistry Surface Chemistry

Marked right : 46.2111801242236% students | Marked incorrect : 20.124223602484474% students | Marked not attempted : 33.66459627329193% students

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

Correct Option: c

View Solution

An example of a disproportionation reaction is :

a)	$2CuBr\rightarrow CuBr_{2}+Cu$	b)	$2KMnO_{4}\rightarrow K_{2}MnO_{4}+MnO_{2}+O_{2}$
c)	$2MnO^{-}_{4}+10I^{-}+16H^{+}\rightarrow 2Mn^{2+}+5I_{2}+8H_{2}O$	d)	$2NaBr+CI_{2}\rightarrow 2NaCI+Br_{2}$

Chemistry - Redox Reaction and Electrochemistry Redox Reactions

Marked right : 4.051747372203756% students | Marked incorrect : 8.78627257209595% students | Marked not attempted : 87.1619800557003% students

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

Correct Option: a

View Solution

The metal that gives hydrogen gas upon treatment with both acid as well as base is :

a)	zinc	b)	iron
c)	mercury	d)	magnesium

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

Marked right : 38.258575197889186% students | Marked incorrect : 12.66490765171504% students | Marked not attempted : 49.07651715039577% students

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

Correct Option: a

View Solution

An element has a face-centred cubic (fcc) structure with a cell edge of a. The distance between the centres of two nearest tetrahedral voids in the lattice is :

a)	$\frac{a}{2}$	b)	a
c)	$\sqrt{2a}$	d)	$\frac{3}{2}a$

Chemistry - States of Matter States of matter Solid state

Marked right : 23.036649214659686% students | Marked incorrect : 16.230366492146597% students | Marked not attempted : 60.73298429319372% students

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

Correct Option: a

View Solution

The major products of the following reaction are :

a)	and Methanol	b)	and Methanol
c)	and Formic acid	d)	and Formic acid

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

Marked right : 11.200000000000001% students | Marked incorrect : 22.400000000000002% students | Marked not attempted : 66.4% students

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

Correct Option: c

View Solution

Maths

For $x\equiv R$ , let $\left [ x \right ]$ denote the greatest integer $\leq x,$ then the sum of the series

$\left [ -\frac{1}{3} \right ]+\left [ -\frac{1}{3}-\frac{1}{100} \right ]+\left [ -\frac{1}{3}-\frac{2}{100} \right ]+\cdots +\left [ -\frac{1}{3}-\frac{99}{100} \right ]$ is :

a)	131	b)	133
c)	135	d)	153

Maths - Algebra Sets, Relations and Functions

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12th April Slot 1

Analysis of JEE Main Paper 2019

JEE Main 2019 Question Paper All Questions