JEE Main 2019 April Question Paper with Answer Key and Solutions

JEE Main 2019 Question Paper All Questions

Chemistry

The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is :

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

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

Marked right : 24.484536082474225% students | Marked incorrect : 15.463917525773196% students | Marked not attempted : 60.051546391752574% students

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

Correct Option: d

View Solution

The hardness (in ppm) of a water sample containing $10^{-3}M \ CaSO_{4}$ is :

(molar mass of $CaSO_{4}=136\ g mol^{-1}$ )

a)	10	b)	90
c)	100	d)	50

Chemistry - Hydrogen

Marked right : 15.841584158415841% students | Marked incorrect : 6.868811881188119% students | Marked not attempted : 77.28960396039604% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

The pair of metal ions that can give a spin-only magnetic moment of 3.9 BM for the complex $[M(H_{2}O)_{6}]Cl_{2},$ is :

$Co^{2+}\: and \: Fe^{2+}$

$V^{2+}\: and\; Co^{2+}$

$V^{2+}\: and\; Fe^{2+}$

$Cr^{2+}\: and\; Mn^{2+}$

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 31.543624161073826% students | Marked incorrect : 11.74496644295302% students | Marked not attempted : 56.711409395973156% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

The standard electrode potential $E^{\ominus }$ and its temperature coefficient $\left ( \frac{dE^{\ominus }}{dT} \right )$ for a cell are 2 V and $-5\times 10^{-4}\; \; VK^{-1}$ at 300K respectively. The cell reaction is

$Zn(s)+Cu^{2+}(aq)\rightarrow Zn^{2+}(aq)+Cu(s)$

The standard reaction enthalpy $(\Delta _{r}H^{\Theta })$ at 300 K in kJ mol ^-1 is , $[UseR=8JK^{-1}mol^{-1}\: and \: F=96,000C\: mol^{-1}]$

a)	-412.8	b)	-384
c)	192	d)	206.4

Chemistry - Electrochemistry Redox Reaction and Electrochemistry Electrochemistry

Marked right : 6.284454244762955% students | Marked incorrect : 10.253583241455347% students | Marked not attempted : 83.4619625137817% students

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

Correct Option: a

View Solution

The correct order for acid strength of compounds

$\mathrm{CH\equiv CH,CH_{3}-C\equiv CH\: and\: CH_{2}=CH_{2}}$
is as follows :

a)	$\mathrm{CH\equiv CH>CH_{2}= CH_{2}>CH_{3}-C\equiv CH}$	b)	$\mathrm{CH_{3}-C\equiv CH>CH_{2}= CH_{2}>HC\equiv CH}$
c)	$\mathrm{CH_{3}-C\equiv CH>CH\equiv CH >CH_{2}= CH_{2}}$	d)	$\mathrm{HC\equiv CH>CH_{3}-C\equiv CH >CH_{2}= CH_{2}}$

Chemistry - Some Basic Principles of Organic Chemistry

Marked right : 27.0% students | Marked incorrect : 22.0% students | Marked not attempted : 51.0% students

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

Correct Option: d

View Solution

Among the following four aromatic compounds, which one will have the lowest melting point ?

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

Marked right : 32.05374280230326% students | Marked incorrect : 18.042226487523994% students | Marked not attempted : 49.90403071017274% students

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

Correct Option: d

View Solution

Among the following compounds most basic amino acid is :

a)	Lysine	b)	Serine
c)	Histidine	d)	Asparagine

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

Marked right : 17.05426356589147% students | Marked incorrect : 22.739018087855296% students | Marked not attempted : 60.20671834625323% students

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

Correct Option: a

View Solution

Two solids dissociate as follows

$A(s)\rightleftharpoons B(g)+C(g);K_{p1}=x\: atm^{2}$

$D(s)\rightleftharpoons C(g)+E(g);K_{p2}=y\: atm^{2}$

The total pressure when both the solids dissociate simultaneously is :

(x + y) atm

$\sqrt{x +y}\: atm$

$x^{2}+y^{2} \: atm$

$2 (\sqrt{x+y})atm$

Chemistry - Physical and Chemical Equilibria Equilibrium Equilibrium

Marked right : 14.44759206798867% students | Marked incorrect : 16.43059490084986% students | Marked not attempted : 69.12181303116147% students

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

Correct Option: d

View Solution

The volume of gas A is twice than that of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressures of the gases for equal number of moles are :

a)	$2P_{A}=3P_{B}$	b)	$3P_{A}=2P_{B}$
c)	$P_{A}=2P_{B}$	d)	$P_{A}=3P_{B}$

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

Marked right : 33.903133903133906% students | Marked incorrect : 11.965811965811966% students | Marked not attempted : 54.131054131054135% students

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

Correct Option: a

View Solution

The major product of the following reaction is :

Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes

Marked right : 7.5% students | Marked incorrect : 21.333333333333336% students | Marked not attempted : 71.16666666666667% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

The major product of the following reaction is :

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

Marked right : 13.128491620111731% students | Marked incorrect : 18.71508379888268% students | Marked not attempted : 68.15642458100558% students

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

Correct Option: b

View Solution

cannot be prepared by :

a)	$CH_{3}CH_{2}COCH_{3}+PhMgX$	b)	$HCHO+PhCH(CH_{3})CH_{2}MgX$
c)	$PhCOCH_{3}+CH_{3}CH_{2}MgX$	d)	$PhCOCH_{2}CH_{3}+CH_{3}MgX$

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

Marked right : 22.938144329896907% students | Marked incorrect : 9.278350515463918% students | Marked not attempted : 67.78350515463917% students

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

Correct Option: b

View Solution

In the following reaction

$Aldehyde + Alcohol\overset{HCl}{\rightarrow}Acetal$

Aldehyde Alcohol

$HCHO$ $^{t}BuOH$

$CH_{3}CHO$ $MeOH$

The best combination is :

$CH_{3}CHO$ and $MeOH$

$HCHO$ and $MeOH$

$HCHO$ and $^{t}BuOH$

$CH_{3}CHO$ and $^{t}BuOH$

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

Marked right : 22.413793103448278% students | Marked incorrect : 17.24137931034483% students | Marked not attempted : 60.3448275862069% students

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

Correct Option: b

View Solution

In chemical reaction, $A+2B\overset{K}{\rightleftharpoons }2C+D$ , the initial concentration of B was 1.5 times of the concentration of A, but the equilibrium concentrations of A and B were found to be equal. The equilibrium constant (K) for the aforesaid chemical reaction is :

a)	16	b)	$\frac{1}{4}$
c)	4	d)	1

Chemistry - Equilibrium

Marked right : 22.641509433962266% students | Marked incorrect : 10.69182389937107% students | Marked not attempted : 66.66666666666666% students

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

Correct Option: c

View Solution

Water samples with BOD values of 4 ppm and 18 ppm, respectively, are :

a)	Clean and Highly polluted	b)	Highly polluted and Highly polluted
c)	Clean and Clean	d)	Highly polluted and Clean

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

Marked right : 49.390243902439025% students | Marked incorrect : 7.113821138211382% students | Marked not attempted : 43.49593495934959% students

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

Correct Option: a

View Solution

The element with Z = 120 (not yet discovered) will be an /a :

a)	inner-transition metal	b)	transition metal
c)	alkali metal	d)	alkaline earth metal

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

Marked right : 32.20338983050847% students | Marked incorrect : 17.675544794188863% students | Marked not attempted : 50.12106537530266% students

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

Correct Option: d

View Solution

$Mn_{2}(CO)_{10}$ is an organometallic compound due to the presence of :

a)	Mn-C bond	b)	Mn - Mn bond
c)	Mn - O bond	d)	C - O bond

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 35.73573573573574% students | Marked incorrect : 14.414414414414415% students | Marked not attempted : 49.849849849849846% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

The molecule that has minimum/no role in the formation of photochemical smog, is :

a)	$N_{2}$	b)	$CH_{2}=O$
c)	$O_{3}$	d)	$NO$

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

Marked right : 38.43329253365973% students | Marked incorrect : 30.47735618115055% students | Marked not attempted : 31.08935128518972% students

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

Correct Option: a

View Solution

50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount (in g) of $NaOH$ in 50 mL of the given sodium hydroxide solution is :

a)	20	b)	4
c)	10	d)	40

Chemistry - Some basic concepts in chemistry

Marked right : 8.612873980054397% students | Marked incorrect : 7.615593834995467% students | Marked not attempted : 83.77153218495013% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

Decomposition of X exhibits a rate constant of 0.05 $\mu g/year$ . How many years are required for the decomposition of 5 $\mu g$ of X into 2.5 $\mu g$ ?

a)	25	b)	40
c)	20	d)	50

Chemistry - Chemical kinetics

Marked right : 30.50397877984085% students | Marked incorrect : 11.405835543766578% students | Marked not attempted : 58.09018567639257% students

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

Correct Option: d

View Solution

A metal on combustion in excess air forms X. X upon hydrolysis with water yields $H_{2}O_{2}\: \: and\: \: O_{2}$ along with another product. The metal is :

a)	Li	b)	Na
c)	Mg	d)	Rb

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

Marked right : 19.893899204244033% students | Marked incorrect : 33.42175066312997% students | Marked not attempted : 46.684350132625994% students

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

Correct Option: d

View Solution

The metal d-orbitals that are directly facing the ligands in $K_{3}\left [ Co\left ( CN \right )_{6} \right ]$ are:

a)	$d_{xz},\: \: d_{yz}\: \: and\: \: d_{z^{2}}$	b)	$d_{xy},\: \: and\: \: d_{x^{2}-y^{2}}$
c)	$d_{x^{2}-y^{2}}\: \: and \: \: d_{z^{2}}$	d)	$d_{xy},\: \: d_{xz}\: \: and\: d_{yz}$

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 25.525525525525527% students | Marked incorrect : 12.612612612612612% students | Marked not attempted : 61.86186186186187% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

$Poly-\! \beta -hydroxybutyrate\! -co-\beta\! -hydroxyvalerate (PHBV)$ is a copolymer of _____.

a)	3-hydroxybutanoic acid and 4-hydroxypentanoic acid	b)	3-hydroxybutanoic acid and 3-hydroxypentanoic acid
c)	2-hydroxybutanoic acid and 3-hydroxypentanoic acid	d)	3-hydroxybutanoic acid and 2-hydroxypentanoic acid

Chemistry - Polymers Polymers

Marked right : 12.54730713245997% students | Marked incorrect : 6.724890829694323% students | Marked not attempted : 80.7278020378457% students

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

Correct Option: b

View Solution

For a diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodynamic quantities?

a)		b)
c)		d)

Chemistry - Chemical Thermodynamics Thermodynamics

Marked right : 17.94871794871795% students | Marked incorrect : 24.501424501424502% students | Marked not attempted : 57.54985754985755% students

(Asked in: NEET - 1970)

Correct Option: b

View Solution

In the following reactions, products A and B are :

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

Marked right : 16.343490304709142% students | Marked incorrect : 9.97229916897507% students | Marked not attempted : 73.68421052631578% students

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

Correct Option: d

View Solution

What is the work function (in eV) of the metal if the light of wavelength $400\AA$ generates photoelectrons of velocity $6\times 10^{5}ms^{-1}$ from it ?

(Mass of electron = $9\times 10^{-31}kg$

Velocity of light = $3\times 10^{8}ms^{-1}$

Planck's constant = $6.626\times 10^{-34}Js$

Charge of electron = $1.6\times 10^{-19}JeV^{-1}$ )

a)	0.9	b)	3.1
c)	2.1	d)	4

Chemistry - Atomic Structure Structure of Atom Atomic Structure

Marked right : 12.296296296296298% students | Marked incorrect : 12.148148148148149% students | Marked not attempted : 75.55555555555556% students

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

Correct Option: c

View Solution

Iodine reacts with concentrated $HNO_{3}$ to yield Y along with other products. The oxidation state of iodine in Y, is :

a)	5	b)	3
c)	1	d)	7

Chemistry - Electrochemistry p- d- and f-block elements Chemical Bonding, Molecular Structure and S-& P- block elements Redox Reaction and Electrochemistry p- Block Elements Some p-Block elements Electrochemistry

Marked right : 6.134467528218551% students | Marked incorrect : 6.985113692131523% students | Marked not attempted : 86.88041877964993% students

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

Correct Option: a

View Solution

In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of :

a)	Copper	b)	Platinum
c)	Carbon	d)	Pure aluminium

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

Marked right : 32.93172690763052% students | Marked incorrect : 26.104417670682732% students | Marked not attempted : 40.963855421686745% students

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

Correct Option: c

View Solution

Consider the critical temperatures for the gaseous species given below

Gas	$H_2$	$CH_4$	$CO_2$	$SO_2$
Critical Temperature (K)	33	190	304	630

On the basis of data given above, predict which of the following gases show least adsorption on a definite amount of charcoal ?

$CH_{4}$

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JEE Main 2019 Question Paper

Analysis of JEE Main Paper 2019

JEE Main 2019 Question Paper All Questions