JEE Main 2019 April Question Paper with Answer Key and Solutions

JEE Main 2019 Question Paper All Questions

Chemistry

Thermal decomposition of an Mn compound (X) at 513 results in a compound Y, $MnO_{2}$ and a gaseous product. $MnO_{2}$ reacts with NaCI and concentrated $H_{2}SO_{4}$ to give a pungent gas Z. X, Y, and Z, respectively, are:

$K_{3}MnO_{4},K_{2}MnO_{4}$ and $Cl_{2}$

$K_{2}MnO_{4}, KMnO_{4}$ and $SO_{2}$

$KMnO_{4}, K_{2}MnO_{4}$ and $Cl_{2}$

$K_{2}MnO_{4}, KMnO_{4}$ and $Cl_{2}$

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

Marked right : 15.29745042492918% students | Marked incorrect : 20.396600566572236% students | Marked not attempted : 64.30594900849859% students

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

Correct Option: c

View Solution

$NO_{2}$ required for a reaction is produced by the decomposition of $N_{2}O_{5}$ in $CCl_{4}$ as per the equation, $2N_{2}O_{5}(g)\rightarrow 4NO_{2}(g)+O_{2}(g)$ .

The initial concentration of $N_{2}O_{5}$ is $3.00 mol L^{-1}$ and it is $2.75 mol L^{-1}$ after 30 minutes. The rate of formation of $NO_{2}$ is:

(in $molL^{-1}min^{-1}$ )

a)	0.01667	b)	0.004167
c)	0.008333	d)	0.002083

Chemistry - Chemical kinetics

Marked right : 6.741573033707865% students | Marked incorrect : 27.752808988764045% students | Marked not attempted : 65.50561797752809% students

(Asked in: BITSAT - 1970)

Correct Option: a

View Solution

The pair that has similar atomic radii is:

a)	Mn and Re	b)	Ti and Hf
c)	Sc and Ni	d)	Mo and W

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

Marked right : 34.9911190053286% students | Marked incorrect : 25.932504440497333% students | Marked not attempted : 39.07637655417407% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The INCORRECT statement is:

a)	Lithium is the strongest reducing agent among the alkali metals.	b)	Lithium is least reactive with water among the alkali metals
c)	$LiNO_{3}$ decomposes on heating to give $LiNO_{2}$ and $O_{2}$	d)	$LiCl$ crystallizes from aqueous solution as $LiCl\cdot 2H_{2}O$

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

Marked right : 35.324675324675326% students | Marked incorrect : 15.064935064935064% students | Marked not attempted : 49.61038961038961% students

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

Correct Option: c

View Solution

The C - C bond length is maximum in:

a)	graphite	b)	$C_{70}$
c)	$C_{60}$	d)	diamond

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

Marked right : 5.924978687127025% students | Marked incorrect : 5.441886899687411% students | Marked not attempted : 88.63313441318556% students

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

Correct Option: d

View Solution

A solution is prepared by dissolving 0.6 g of urea (molar mass = 60g $mol^{-1}$ ) and 1.8 g of glucose (molar mass = 180 g $mol^{-1}$ ) in 100 mL of water at $27^{\circ}C$ . The osmotic pressure of the solution is (in atm):

(R = 0.08206 L atm $K^{-1}mol^{-1})$

(Response should be upto only two decimal digit like 78.76 or 0.78).

a)	4.92	b)	2.46
c)	5.8	d)	1.64

Chemistry - Solutions

Marked right : 23.492723492723496% students | Marked incorrect : 9.355509355509357% students | Marked not attempted : 67.15176715176715% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

In comparison to boron, beryllium has:

a)	lesser nuclear charge and lesser first ionisation enthalpy	b)	greater nuclear charge and lesser first ionisation enthalpy
c)	greater nuclear charge and greater first ionisation enthalpy	d)	lesser nuclear charge and greater first ionisation enthalpy

Chemistry - Classification of Elements and Periodic table

Marked right : 30.727272727272727% students | Marked incorrect : 28.545454545454547% students | Marked not attempted : 40.72727272727273% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The decreasing order of electrical conductivity of the following aqueous solution is:

0.1 M Formic acid (A),

0.1 M Acetic acid (B),

0.1 M Benzoic acid (C)

a)	A > C > B	b)	C > B > A
c)	A > B > C	d)	C > A > B

Chemistry - Carboxylic Acids and their derivatives Organic compounds containing C, H AND O (Alcohols, Phenols, Ethers, Aldehydes, Ketones and Carboxylic acids) Organic Compounds containing Oxygen

Marked right : 7.7167171498629745% students | Marked incorrect : 21.419299004759846% students | Marked not attempted : 70.86398384537718% students

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

Correct Option: a

View Solution

What will be the major product when m-cresol is reacted with propargyl bromide $(HC\equiv C-CH_{2}Br)$ in the presence of $K_{2}CO_{3}$ in acetone?

a)		b)
c)		d)

Chemistry - Organic Compounds with Functional Groups Containing Oxygen and Nitrogen Organic compounds containing C, H AND O (Alcohols, Phenols, Ethers, Aldehydes, Ketones and Carboxylic acids) Organic Compounds containing Oxygen Aldehydes, Ketones and Carboxylic Acids

Marked right : 6.163144180660105% students | Marked incorrect : 21.89128546612623% students | Marked not attempted : 71.94557035321367% students

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

Correct Option: a

View Solution

The molar solubility of $Cd(OH)_{2}$ is $1.84\times 10^{-5}M$ in water. The expected solubility of $Cd(OH)_{2}$ in a buffer solution of pH = 12 is :

$1.84\times 10^{-9}M$

$\frac{2.49}{1.84}\times 10^{-9}M$

$6.23\times 10^{-11}M$

$2.49\times 10^{-10}M$

Chemistry - Solutions Solutions

Marked right : 18.207282913165265% students | Marked incorrect : 7.002801120448179% students | Marked not attempted : 74.78991596638656% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives:

a)		b)
c)		d)

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

Marked right : 14.688772542175684% students | Marked incorrect : 8.071553228621292% students | Marked not attempted : 77.23967422920303% students

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

Correct Option: c

View Solution

The correct statement is:

leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate.

the Hall-Heroult process is used for the production of aluminum and iron

pig iron obtained from cast iron

the blistered appearance of copper during the metallurgical process is due to the evaluation of $CO_{2}$

Chemistry - Purification and Characterisation of Organic Compounds Organic Chemistry - some Basic principles and techniques

Marked right : 21.910112359550563% students | Marked incorrect : 23.03370786516854% students | Marked not attempted : 55.0561797752809% students

(Asked in: NEET - 1970)

Correct Option: a

View Solution

The primary pollutant that leads to photochemical; smog is:

a)	acrolein	b)	nitrogen oxides
c)	ozone	d)	sulphur dioxide

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

Marked right : 45.915841584158414% students | Marked incorrect : 21.534653465346533% students | Marked not attempted : 32.54950495049505% students

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

Correct Option: b

View Solution

The IUPAC name for the following compounds is:

a)	3-methyl-4-(3-methylprop-1-enyl)-1-heptyne	b)	3,5-dimethyl-4-propylhept-6-en-1-yne
c)	3-methyl-4-(1-methylprop-2-ynyl)-1-heptene	d)	3,5-dimethyl-4-propylhept-1-en-6-yen

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

Marked right : 19.346049046321525% students | Marked incorrect : 28.065395095367844% students | Marked not attempted : 52.58855585831063% students

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

Correct Option: d

View Solution

The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, respectively, are:

$Mg(HCO_{3})_{2}$ and $Mg(HO)_{2}$

$Ca(HCO_{3})_{2}$ and $Ca(HO)_{2}$

$Mg(HCO_{3})_{2}$ and $MgCO_{3}$

$Ca(HCO_{3})_{2}$ and CaO

Chemistry - Hydrogen and s-block Elements Hydrogen Hydrogen

Marked right : 24.057450628366247% students | Marked incorrect : 28.366247755834827% students | Marked not attempted : 47.57630161579892% students

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

Correct Option: a

View Solution

In the following skew conformation of ethane, ${H}' - C - C - H''$ dihedral angle is:

a)	$58^{\circ}$	b)	$149^{\circ}$
c)	$151^{\circ}$	d)	$120^{\circ}$

Chemistry - Some Basic Principles of Organic Chemistry

Marked right : 22.3463687150838% students | Marked incorrect : 18.24953445065177% students | Marked not attempted : 59.40409683426443% students

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

Correct Option: b

View Solution

Among the following, the energy of 2s orbital is lowest in:

a)	K	b)	H
c)	Li	d)	Na

Chemistry - Atomic Structure Atomic Structure

Marked right : 24.35129740518962% students | Marked incorrect : 33.532934131736525% students | Marked not attempted : 42.115768463073856% students

(Asked in: BITSAT - 1970)

Correct Option: a

View Solution

Which one of the following is likely to give a precipitate with $AgNO_{3}$ solution?

$CH_{2}=CH-Cl$

$CCl_{4}$

$CHCl_{3}$

$(CH_{3})_{3}CCl$

Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes

Marked right : 25.32347504621072% students | Marked incorrect : 16.081330868761555% students | Marked not attempted : 58.59519408502772% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

25g of an unknown hydrocarbon upon burning produces 88 g of $CO_{2}$ and 9 g of $H_{2}O$ . This unknown hydrocarbon contains:

a)	20 g of carbon and 5 g of hydrogen	b)	22 g of carbon and 3 g of hydrogen
c)	24 g of carbon and 1 g of hydrogen	d)	18 g of carbon and 7 g of hydrogen

Chemistry - Some basic concepts in chemistry

Marked right : 15.017757483510907% students | Marked incorrect : 9.081684424150177% students | Marked not attempted : 75.90055809233891% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

Heating of 2-chloro-1-phenylbutane with EtOK/EtOH gives X as the major product. The reaction of X with $Hg(OAc)_{2}/H_{2}O$ followed by $NaBH_{4}$ gives Y as the major product. Y is:

a)		b)
c)		d)

Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes

Marked right : 21.062271062271062% students | Marked incorrect : 14.102564102564102% students | Marked not attempted : 64.83516483516483% students

(Asked in: NEET - 1970)

Correct Option: c

View Solution

The compound used in the treatment of lead poisoning is:

a)	D-penicillamine	b)	desferrioxime B
c)	Cis-plantin	d)	EDTA

Chemistry - Chemistry in Everyday Life Chemistry in Everyday Life

Marked right : 13.607863074055246% students | Marked incorrect : 15.861718352821555% students | Marked not attempted : 70.5304185731232% students

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

Correct Option: d

View Solution

Which of the given statement is INCORRECT about glycogen?

a)	It is a straight chain polymer similar to amylose.	b)	Only $\alpha - linkages$ are present in the molecule
c)	It is present in animal cells	d)	It is present in some yeast and fungi.

Chemistry - Biomolecules Biomolecules

Marked right : 6.460674157303371% students | Marked incorrect : 10.182584269662922% students | Marked not attempted : 83.35674157303372% students

(Asked in: KEAM - 1970)

Correct Option: a

View Solution

Consider the following reactions:

'A' is :

$CH\equiv CH$

$CH_{3}-C\equiv C-CH_{3}$

$CH_{3}-C\equiv CH$

$CH_{2}=CH_{2}$

Chemistry - Principles of Organic Chemistry and Hydrocarbons Hydrocarbons Hydrocarbons

Marked right : 23.933209647495364% students | Marked incorrect : 21.521335807050093% students | Marked not attempted : 54.54545454545454% students

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

Correct Option: c

View Solution

The correct of the following polymer is :

a)	Polyisobutane	b)	Polytert - butylene
c)	Polysioprene	d)	Polyisobutylene

Chemistry - Polymers Polymers

Marked right : 30.88235294117647% students | Marked incorrect : 24.63235294117647% students | Marked not attempted : 44.48529411764706% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options:

Assertion (A): Vinyl halides do not undergo nucleophilic substitution easily.

Reason (R): Even though the intermediate carbocation is stabilized by loosely held $\pi-$ electrons, the cleavage is difficult because of strong bonding.

Both (A) and (R) are wrong statements

Both (A) and (R) are the correct statement and (R) is the correct explanation of (A).

Both (A) and (R) are correct statements but (R) isnot the correct explanation of (A).

(A) is a correct statement but (R) wrong statement.

Chemistry - Organic Compounds containing Halogens Haloalkanes and Haloarenes

Marked right : 14.12639405204461% students | Marked incorrect : 20.44609665427509% students | Marked not attempted : 65.4275092936803% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The ratio of a number of atoms present in a simple cubic, body-centered cubic and face-centered cubic structure are, respectively:

a)	8 : 1 : 6	b)	1 : 2 : 4
c)	4 : 2 : 1	d)	4 : 2 : 3

Chemistry - States of Matter States of matter Solid state

Marked right : 42.56410256410256% students | Marked incorrect : 4.358974358974359% students | Marked not attempted : 53.07692307692308% students

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

Correct Option: b

View Solution

In which one of the following equilibria,

$\mathrm{K_{p}\neq K_{c}?}$

a)	$\\mathrm{2 C(s)+O_{2}(g) \\rightleftharpoons 2 C O(g)}$	b)	$\\mathrm{2 H I(g) \\rightleftharpoons H_{2}(g)+I_{2}(g)}$
c)	$\\mathrm{N O_{2}(g)+S O_{2}(g) \\rightleftharpoons N O(g)+S O_{3}(g)}$	d)	$\\mathrm{2 N O(g) \\rightleftharpoons N_{2}(g)+O_{2}(g)}$

Chemistry - Equilibrium

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

Correct Option: a

View Solution

The coordination numbers of Co and Al in $[Co(Cl)(en)_{2}]Cl$ and $K_{3}[Al(C_{2}O_{4})_{3}]$ , respectively, are :

(en = ethane-1, 2-diamine)

a)	5 and 3	b)	3 and 3
c)	6 and 6	d)	5 and 6

Chemistry - Co-ordination Compounds Coordination compounds:

Marked right : 30.56379821958457% students | Marked incorrect : 17.210682492581604% students | Marked not attempted : 52.22551928783383% students

(Asked in: NEET - 1970)

Correct Option: d

View Solution

The INCORRECT match in the following is:

$\Delta G^{0}<0,K>1$

$\Delta G^{0}=0,K=1$

$\Delta G^{0}>0,K>1$

$\Delta G^{0}<0,K<1$

Chemistry - Physical and Chemical Equilibria Equilibrium Equilibrium

Marked right : 18.73198847262248% students | Marked incorrect : 24.495677233429394% students | Marked not attempted : 56.77233429394812% students

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

Correct Option: d

View Solution

Among the following, the INCORRECT statement about colloids is:

a)	They can scatter light.	b)	They are larger than small molecules and have high molar mass.
c)	The osmotic pressure of a colloidal solution is of a higher order than the true solution at the same concentration.	d)	The range of diameters of colloidal particles is between 1 and 1000 nm.

Chemistry - Surface Chemistry

Marked right : 33.81294964028777% students | Marked incorrect : 15.827338129496402% students | Marked not attempted : 50.35971223021583% students

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

Correct Option: c

View Solution

Maths

The derivative of $\tan ^{-1}\left ( \frac{\sin x-\cos x}{\sin x+\cos x} \right )$ ,

with respect to $\frac{x}{2}$ , where $\left ( c\epsilon \left ( 0,\frac{\pi }{2} \right ) \right )$ is :

$\frac{2}{3}$

$\frac{1}{2}$

Maths - Trigonometry Differential Calculus Trigonometry Limit , continuity and differentiability

Marked right : 15.868263473053892% students | Marked incorrect : 14.67065868263473% students | Marked not attempted : 69.46107784431138% students

(Asked in: BITSAT - 1970)

Correct Option: d

View Solution

For initial screening of an admission test, a candidate is given fifty problems to solve. If the probability that the candidate can solve any problem is $\frac{4}{5},$ then the probability that he is unable to solve less than two problem is :

$\frac{201}{5}\left ( \frac{1}{5} \right )^{49}$

$\frac{316}{25}\left ( \frac{4}{5} \right )^{48}$

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12th April Slot 2

Analysis of JEE Main Paper 2019

JEE Main 2019 Question Paper All Questions