JEE Main 3 April Shift 1 Question Paper (Available) - Download Solutions and Answer Key

Let \( A \) be a matrix of order \( 3 \times 3 \) and \( |A| = 5 \). If \[ |2 \, adj(3A \, adj(2A))| = 2^{\alpha} \cdot 3^{\beta} \cdot 5^{\gamma}, \quad \alpha, \beta, \gamma \in \mathbb{N} \]
then \( \alpha + \beta + \gamma \) is equal to

• (1) \( 25 \)
• (2) \( 26 \)
• (3) \( 27 \)
• (4) \( 28 \)

Let a line passing through the point \( (4,1,0) \) intersect the line \( L_1: \frac{x - 1}{2} = \frac{y - 2}{3} = \frac{z - 3}{4} \) at the point \( A(\alpha, \beta, \gamma) \) and the line \( L_2: x - 6 = y = -z + 4 \) at the point \( B(a, b, c) \). Then \[ \begin{vmatrix} 1 & 0 & 1
\alpha & \beta & \gamma
a & b & c \end{vmatrix} is equal to \]

• (1) \( 8 \)
• (2) \( 16 \)
• (3) \( 12 \)
• (4) \( 6 \)

Let \( \alpha \) and \( \beta \) be the roots of \( x^2 + \sqrt{3}x - 16 = 0 \), and \( \gamma \) and \( \delta \) be the roots of \( x^2 + 3x - 1 = 0 \). If \( P_n = \alpha^n + \beta^n \) and \( Q_n = \gamma^n + \delta^n \), then \[ \frac{P_{25} + \sqrt{3}P_{24}}{2P_{23}} + \frac{Q_{25} - Q_{23}}{Q_{24}} is equal to \]

• (1) \( 3 \)
• (2) \( 4 \)
• (3) \( 5 \)
• (4) \( 7 \)

The sum of all rational terms in the expansion of \( \left( 2 + \sqrt{3} \right)^8 \) is

• (1) \(16923\)
• (2) \(3763\)
• (3) \(33845\)
• (4) \(18817\)

Let A = {-3,-2,-1,0,1,2,3}. Let R be a relation on A defined by xRy if and only if \( 0 \le x^2 + 2y \le 4 \). Let \( l \) be the number of elements in R and m be the minimum number of elements required to be added in R to make it a reflexive relation. then \( l + m \) is equal to

• (1) 19
• (2) 20
• (3) 17
• (4) 18

A line passing through the point P\((\sqrt{5}, \sqrt{5})\) intersects the ellipse \( \frac{x^2}{36} + \frac{y^2}{25} = 1 \) at A and B such that (PA).(PB) is maximum. Then 5(PA\(^2\) + PB\(^2\)) is equal to :

• (1) 218
• (2) 377
• (3) 290
• (4) 338

The sum 1 + 3 + 11 + 25 + 45 + 71 + ... upto 20 terms, is equal to

• (1) 7240
• (2) 7130
• (3) 6982
• (4) 8124

If the domain of the function \( f(x) = \log_e \left( \frac{2x-3}{5+4x} \right) + \sin^{-1} \left( \frac{4+3x}{2-x} \right) \) is \( [\alpha, \beta] \), then \( \alpha^2 + 4\beta \) is equal to

• (1) 5
• (2) 4
• (3) 3
• (4) 7

If \( \sum_{r=1}^{9} \left( \frac{r+3}{2^r} \right) \cdot {^9C_r} = \alpha \left( \frac{3}{2} \right)^9 - \beta \), \( \alpha, \beta \in \mathbb{N} \), then \( (\alpha + \beta)^2 \) is equal to

• (1) 27
• (2) 9
• (3) 81
• (4) 18

The number of solutions of the equation \( 2x + 3\tan x = \pi \), \( x \in [-2\pi, 2\pi] - \left\{ \pm \frac{\pi}{2}, \pm \frac{3\pi}{2} \right\} \) is

• (1) 6
• (2) 5
• (3) 4
• (4) 3

If \( y(x) = \begin{vmatrix} \sin x & \cos x & \sin x + \cos x + 1
27 & 28 & 27
1 & 1 & 1 \end{vmatrix} \), \( x \in \mathbb{R} \), then \( \frac{d^2y}{dx^2} + y \) is equal to

• (1) -1
• (2) 28
• (3) 27
• (4) 1

Let g be a differentiable function such that \( \int_0^x g(t) dt = x - \int_0^x tg(t) dt \), \( x \ge 0 \) and let \( y = y(x) \) satisfy the differential equation \( \frac{dy}{dx} - y \tan x = 2(x+1) \sec x g(x) \), \( x \in \left[ 0, \frac{\pi}{2} \right) \). If \( y(0) = 0 \), then \( y\left( \frac{\pi}{3} \right) \) is equal to

• (1) \( \frac{2\pi}{3\sqrt{3}} \)
• (2) \( \frac{4\pi}{3} \)
• (3) \( \frac{2\pi}{3} \)
• (4) \( \frac{4\pi}{3\sqrt{3}} \)

A line passes through the origin and makes equal angles with the positive coordinate axes. It intersects the lines \( L_1 : 2x + y + 6 = 0 \) and \( L_2 : 4x + 2y - p = 0 \), \( p > 0 \), at the points A and B, respectively. If \( AB = \frac{9}{\sqrt{2}} \) and the foot of the perpendicular from the point A on the line \( L_2 \) is M, then \( \frac{AM}{BM} \) is equal to

• (1) 5
• (2) 4
• (3) 2
• (4) 3

Let \( z \in \mathbb{C} \) be such that \( \frac{z+3i}{z-2+i} = 2+3i \). Then the sum of all possible values of \( z \) is

• (1) \( 19 - 2i \)
• (2) \( -19 - 2i \)
• (3) \( 19 + 2i \)
• (4) \( -19 + 2i \)

Let \( f(x) = \int x^3 \sqrt{3-x^2} dx \). If \( 5f(\sqrt{2}) = -4 \), then \( f(1) \) is equal to

• (1) \( -\frac{2\sqrt{2}}{5} \)
• (2) \( -\frac{8\sqrt{2}}{5} \)
• (3) \( -\frac{4\sqrt{2}}{5} \)
• (4) \( -\frac{6\sqrt{2}}{5} \)

Let \( a_1, a_2, a_3, ... \) be a G.P. of increasing positive numbers. If \( a_3 a_5 = 729 \) and \( a_2 + a_4 = \frac{111}{4} \), then \( 24(a_1 + a_2 + a_3) \) is equal to

• (1) 131
• (2) 130
• (3) 129
• (4) 128

Let the domain of the function \( f(x) = \log_2 \log_4 \log_6 (3 + 4x - x^2) \) be (a, b). If \( \int_0^{a+b} [x^2] dx = p - q\sqrt{r} \), \( p, q, r \in \mathbb{N} \), gcd(p, q, r) = 1, where [.] is the greatest integer function, then p + q + r is equal to

• (1) 10
• (2) 8
• (3) 11
• (4) 9

The radius of the smallest circle which touches the parabolas \( y = x^2 + 2 \) and \( x = y^2 + 2 \) is

• (1) \( \frac{7\sqrt{2}}{2} \)
• (2) \( \frac{7\sqrt{2}}{16} \)
• (3) \( \frac{7\sqrt{2}}{4} \)
• (4) \( \frac{7\sqrt{2}}{8} \)

Let \( f(x) = \begin{cases} (1+ax)^{1/x} & , x < 0
1+b & , x = 0
\frac{(x+4)^{1/2} - 2}{(x+c)^{1/3} - 2} & , x > 0 \end{cases} \) be continuous at x = 0. Then \( e^a bc \) is equal to

• (1) 64
• (2) 72
• (3) 48
• (4) 36

Line \( L_1 \) passes through the point (1, 2, 3) and is parallel to z-axis. Line \( L_2 \) passes through the point \( (\lambda, 5, 6) \) and is parallel to y-axis. Let for \( \lambda = \lambda_1, \lambda_2, \lambda_2 < \lambda_1 \), the shortest distance between the two lines be 3. Then the square of the distance of the point \( (\lambda_1, \lambda_2, 7) \) from the line \( L_1 \) is

• (1) 40
• (2) 32
• (3) 25
• (4) 37

All five letter words are made using all the letters A, B, C, D, E and arranged as in an English dictionary with serial numbers. Let the word at serial number \( n \) be denoted by \( W_n \). Let the probability \( P(W_n) \) of choosing the word \( W_n \) satisfy \( P(W_n) = 2P(W_{n-1}) \), \( n > 1 \). If \( P(CDBEA) = \frac{2^\alpha}{2^\beta - 1} \), \( \alpha, \beta \in \mathbb{N} \), then \( \alpha + \beta \) is equal to :

Let the product of the focal distances of the point P(4, \( 2\sqrt{3} \)) on the hyperbola H: \( \frac{x^2}{a^2} - \frac{y^2}{b^2} = 1 \) be 32. Let the length of the conjugate axis of H be p and the length of its latus rectum be q. Then \( p^2 + q^2 \) is equal to .....

Let \( \vec{a} = \hat{i} + \hat{j} + \hat{k} \), \( \vec{b} = 3\hat{i} + 2\hat{j} - \hat{k} \), \( \vec{c} = \lambda \hat{j} + \mu \hat{k} \) and \( \hat{d} \) be a unit vector such that \( \vec{a} \times \hat{d} = \vec{b} \times \hat{d} \) and \( \vec{c} \cdot \hat{d} = 1 \). If \( \vec{c} \) is perpendicular to \( \vec{a} \), then \( |3\lambda \hat{d} + \mu \vec{c}|^2 \) is equal to ____.

If the number of seven-digit numbers, such that the sum of their digits is even, is \( m \cdot n \cdot 10^a \); \( m, n \in \{1, 2, 3, ..., 9\} \), then \( m + n \) is equal to

The area of the region bounded by the curve \( y = \max\{|x|, |x-2|\} \), then x-axis and the lines x = -2 and x = 4 is equal to ____.

During the melting of a slab of ice at 273 K at atmospheric pressure:

• (1) Internal energy of ice-water system remains unchanged.
• (2) Positive work is done by the ice-water system on the atmosphere.
• (3) Internal energy of the ice-water system decreases.
• (4) Positive work is done on the ice-water system by the atmosphere.

Consider a completely full cylindrical water tank of height 1.6 m and cross-sectional area 0.5 \( m^2 \). It has a small hole in its side at a height 90 cm from the bottom. Assume, the cross-sectional area of the hole to be negligibly small as compared to that of the water tank. If a load 50 kg is applied at the top surface of the water in the tank then the velocity of the water coming out at the instant when the hole is opened is : (g = 10 \( m/s^2 \))

• (1) 3 m/s
• (2) 5 m/s
• (3) 2 m/s
• (4) 4 m/s

Choose the correct logic circuit for the given truth table having inputs A and B.

A & B & Y

0 & 0 & 0

0 & 1 & 0

1 & 0 & 1

1 & 1 & 1
 

• (1) \includegraphics{q28_1.png}
• (2) \includegraphics{q28_2.png}
• (3) \includegraphics{q28_3.png}
• (4) \includegraphics{q28_d.png}

The radiation pressure exerted by a 450 W light source on a perfectly reflecting surface placed at 2m away from it, is :

• (1) 1.5 \times 10^{-4} Pascals
• (2) 0
• (3) 6 \times 10^{-5} Pascals
• (4) 3 \times 10^{-5} Pascals

A wire of length \( 25 \, m \) and cross-sectional area \( 5 \, mm^2 \) having resistivity \( 2 \times 10^{-6} \, \Omega \cdot m \) is bent into a complete circle. The resistance between diametrically opposite points will be:

• (1) 12.5 \( \Omega \)
• (2) 50 \( \Omega \)
• (3) 100 \( \Omega \)
• (4) 25 \( \Omega \)

Two blocks of masses m and M, (M > m), are placed on a frictionless table as shown in figure. A massless spring with spring constant k is attached with the lower block. If the system is slightly displaced and released then (\( \mu \) = coefficient of friction between the two blocks)

• (A) The time period of small oscillation of the two blocks is T = \( 2\pi \sqrt{\frac{M+m}{k}} \)
• (B) The acceleration of the blocks is a = \( \frac{kx}{M+m} \) (x = displacement of the blocks from the mean position)
• (C) The magnitude of the frictional force on the upper block is \( \frac{m\mu x}{M+m} \)
• (D) The maximum amplitude of the upper block, if it does not slip, is \( \frac{\mu (M+m)g}{k} \)
• (E) Maximum frictional force can be \( \mu (M+m)g \).
• Choose the \textbf{correct} answer from the options given below :
• (1) A, B, D Only
• (2) B, C, D Only
• (3) C, D, E Only
• (4) A, B, C Only

Which of the following curves possibly represent one-dimensional motion of a particle?

• (A)
• (B)
• (C)
• (D)
• Choose the \textbf{correct} answer from the options given below :
• (1) A, B and D only
• (2) A, B and C only
• (3) A and B only
• (4) A, C and D only

A parallel plate capacitor is filled equally (half) with two dielectrics of dielectric constant \( \epsilon_1 \) and \( \epsilon_2 \), as shown in figures. The distance between the plates is d and area of each plate is A. If capacitance in first configuration and second configuration are \( C_1 \) and \( C_2 \) respectively, then \( \frac{C_1}{C_2} \) is:

• (1) \( \frac{\epsilon_1 \epsilon_2}{(\epsilon_1 + \epsilon_2)^2} \)
• (2) \( \frac{4\epsilon_1 \epsilon_2}{(\epsilon_1 + \epsilon_2)^2} \)
• (3) \( \frac{\epsilon_1 \epsilon_2}{\epsilon_1 + \epsilon_2} \)
• (4) \( \frac{\epsilon_0 (\epsilon_1 + \epsilon_2)}{2} \)

Match the LIST-I with LIST-II

LIST-I                                                  LIST-II

A. Gravitational constant                 I. \( [LT^{-2}] \)

B. Gravitational potential energy    II. \( [L^2T^{-2}] \)

C. Gravitational potential                 III. \( [ML^2T^{-2}] \)

D. Acceleration due to gravity         IV. \( [M^{-1}L^3T^{-2}] \)


Choose the correct answer from the options given below :

• (1) A-IV, B-III, C-II, D-I
• (2) A-III, B-II, C-I, D-IV
• (3) A-II, B-IV, C-III, D-I
• (4) A-I, B-III, C-IV, D-II

A force of 49 N acts tangentially at the highest point of a sphere (solid) of mass 20 kg, kept on a rough horizontal plane. If the sphere rolls without slipping, then the acceleration of the center of the sphere is

• (1) 3.5 \( m/s^2 \)
• (2) 0.35 \( m/s^2 \)
• (3) 2.5 \( m/s^2 \)
• (4) 0.25 \( m/s^2 \)

A piston of mass M is hung from a massless spring whose restoring force law goes as F = -kx, where k is the spring constant of appropriate dimension. The piston separates the vertical chamber into two parts, where the bottom part is filled with 'n' moles of an ideal gas. An external work is done on the gas isothermally (at a constant temperature T) with the help of a heating filament (with negligible volume) mounted in lower part of the chamber, so that the piston goes up from a height \( L_0 \) to \( L_1 \), the total energy delivered by the filament is (Assume spring to be in its natural length before heating)

• (1) \( 3nRT \ln \left( \frac{L_1}{L_0} \right) + 2Mg(L_1 - L_0) + \frac{k}{3} (L_1^3 - L_0^3) \)
• (2) \( nRT \ln \left( \frac{L_1}{L_0} \right) + \frac{Mg}{2} (L_1 - L_0) + \frac{k}{4} (L_1^4 - L_0^4) \)
• (3) \( nRT \ln \left( \frac{L_1}{L_0} \right) + Mg(L_1 - L_0) + \frac{k}{4} (L_1^4 - L_0^4) \)
• (4) \( nRT \ln \left( \frac{L_1}{L_0} \right) + Mg(L_1 - L_0) + \frac{3k}{4} (L_1^4 - L_0^4) \)

A gas is kept in a container having walls which are thermally non-conducting. Initially the gas has a volume of 800 \( cm^3 \) and temperature 27°C. The change in temperature when the gas is adiabatically compressed to 200 \( cm^3 \) is: (Take \( \gamma \) = 1.5 : \( \gamma \) is the ratio of specific heats at constant pressure and at constant volume)

• (1) 327 K
• (2) 600 K
• (3) 522 K
• (4) 300 K

Match the LIST-I with LIST-II

\LIST-I                                                                                                              LIST-II

A. \( ^{236}_{92} U \rightarrow ^{94}_{38} Sr + ^{140}_{54} Xe + 2n \)   I. Chemical Reaction
 
B. \( 2H_2 + O_2 \rightarrow 2H_2O \)                                                       II. Fusion with +ve Q value

C. \( ^3_1 H + ^2_1 H \rightarrow ^4_2 He + n \)                                      III. Fission

D. \( ^1_1 H + ^3_1 H \rightarrow ^4_2 H + \gamma \)                             IV. Fusion with -ve Q value


Choose the correct answer from the options given below :

• (1) A-II, B-I, C-III, D-IV
• (2) A-III, B-I, C-II, D-IV
• (3) A-II, B-I, C-IV, D-III
• (4) A-III, B-I, C-IV, D-II

The electrostatic potential on the surface of uniformly charged spherical shell of radius R = 10 cm is 120 V. The potential at the centre of shell, at a distance r = 5 cm from centre, and at a distance r = 15 cm from the centre of the shell respectively, are:

• (1) 120V, 120V, 80V
• (2) 40V, 40V, 80V
• (3) 0V, 0V, 80V
• (4) 0V, 120V, 40V

The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons is

• (1) Green
• (2) Blue
• (3) Red
• (4) Yellow

A particle is released from height S above the surface of the earth. At certain height its kinetic energy is three times its potential energy. The height from the surface of the earth and the speed of the particle at that instant are respectively.

• (1) \( \frac{S}{2} \), \( \sqrt{\frac{3gS}{2}} \)
• (2) \( \frac{S}{2} \), \( \frac{3gS}{2} \)
• (3) \( \frac{S}{4} \), \( \sqrt{\frac{3gS}{2}} \)
• (4) \( \frac{S}{4} \), \( \frac{3gS}{2} \)

A person measures mass of 3 different particles as 435.42 g, 226.3 g and 0.125 g. According to the rules for arithmetic operations with significant figures, the additions of the masses of 3 particles will be.

• (1) 661.845 g
• (2) 662 g
• (3) 661.8 g
• (4) 661.84 g

The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens is 12 cm. The refractive index of the lens material is

• (1) 1.2
• (2) 1.4
• (3) 1.5
• (4) 1.8

The angle of projection of a particle is measured from the vertical axis as \( \phi \) and the maximum height reached by the particle is \( h_m \). Here \( h_m \) as function of \( \phi \) can be presented as

• (1)
• (2)
• (3)
• (4)

Correct Answer: (3)
View Solution

Consider following statements for refraction of light through prism, when angle of deviation is minimum.

• (A) The refracted ray inside prism becomes parallel to the base.
• (B) Larger angle prisms provide smaller angle of minimum deviation.
• (C) Angle of incidence and angle of emergence becomes equal.
• (D) There are always two sets of angle of incidence for which deviation will be same except at minimum deviation setting.
• (E) Angle of refraction becomes double of prism angle.
• Choose the \textbf{correct} answer from the options given below:
• (1) A, C and D Only
• (2) B, C and D Only
• (3) A, B and E Only
• (4) B, D and E Only

Three identical spheres of mass m, are placed at the vertices of an equilateral triangle of length a. When released, they interact only through gravitational force and collide after a time T = 4 seconds. If the sides of the triangle are increased to length 2a and also the masses of the spheres are made 2m, then they will collide after ______ seconds.

A 4.0 cm long straight wire carrying a current of 8A is placed perpendicular to an uniform magnetic field of strength 0.15 T. The magnetic force on the wire is ______ mN.

Two coherent monochromatic light beams of intensities 4I and 9I are superimposed. The difference between the maximum and minimum intensities in the resulting interference pattern is xI. The value of x is ______.

A loop ABCD, carrying current \( I = 12 \, A \), is placed in a plane, consists of two semi-circular segments of radius \( R_1 = 6\pi \, m \) and \( R_2 = 4\pi \, m \). The magnitude of the resultant magnetic field at center O is \( k \times 10^{-7} \, T \). The value of \( k \) is ______ (Given \( \mu_0 = 4\pi \times 10^{-7} \, T m A^{-1} \))

In the figure shown below, a resistance of 150.4 \( \Omega \) is connected in series to an ammeter A of resistance 240 \( \Omega \). A shunt resistance of 10 \( \Omega \) is connected in parallel with the ammeter. The reading of the ammeter is ______ mA.

Which of the following postulate of Bohr's model of hydrogen atom in not in agreement with quantum mechanical model of an atom ?

• (1) An atom in a stationary state does not emit electromagnetic radiation as long as it stays in the same state
• (2) An atom can take only certain distinct energies \( E_1 \), \( E_2 \), \( E_3 \), etc. These allowed states of constant energy are called the stationary states of atom
• (3) When an electron makes a transition from a higher energy stationary state to a lower energy stationary state, then it emits a photon of light
• (4) The electron in a H atom's stationary state moves in a circle around the nucleus

Given below are two statements:
Statement I : The N-N single bond is weaker and longer than that of P-P single bond
Statement II : Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions.
In the light of above statements, choose the correct answer from the options given below

• (1) Statement I is true but Statement II is false
• (2) Both Statement I and Statement II are false
• (3) Statement I is false but Statement II is true
• (4) Both Statement I and Statement II are true

Given below are two statements:


Statement I: A catalyst cannot alter the equilibrium constant (\( K_c \)) of the reaction, temperature remaining constant.


Statement II: A homogeneous catalyst can change the equilibrium composition of a system, temperature remaining constant.


In the light of the above statements, choose the correct answer from the options given below.

• (1) Statement I is false but Statement II is true
• (2) Both Statement I and Statement II are true
• (3) Both Statement I and Statement II are false
• (4) Statement I is true but Statement II is false

The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are
A. \( Cr^{2+} \)
B. \( Fe^{2+} \)
C. \( Fe^{3+} \)
D. \( Co^{2+} \)
E. \( Mn^{2+} \)
Choose the correct answer from the options given below

• (1) A, C and E only
• (2) B and E only
• (3) B and E only
• (4) A, B and E only
• (A) \( \mathrm{Cr}^{2+} = [\mathrm{Ar}]\,3d^4 \) (4 unpaired \( e^- \))
• (B) \( \mathrm{Fe}^{2+} = [\mathrm{Ar}]\,3d^6 \) (4 unpaired \( e^- \))
• (C) \( \mathrm{Fe}^{3+} = [\mathrm{Ar}]\,3d^5 \) (5 unpaired \( e^- \))
• (D) \( \mathrm{Co}^{2+} = [\mathrm{Ar}]\,3d^7 \) (3 unpaired \( e^- \))

In a reaction A + B → C, initial concentrations of A and B are related as \( [A]_0 = 8[B]_0 \). The half lives of A and B are 10 min and 40 min, respectively. If they start to disappear at the same time, both following first order kinetics, after how much time will the concentration of both the reactants be same?

• (1) 60 min
• (2) 80 min
• (3) 20 min
• (4) 40 min

Which of the following is the correct structure of L-fructose?

• (1)
• (2)
• (3)
• (4)

Identify the correct statements from the following

A.

B.

C.

D.

Choose the correct answer from the options given below

• (1) C and D only
• (2) B and C only
• (3) A and B only
• (4) A, B and C only

Among \( 10^{-10} \) g (each) of the following elements, which one will have the highest number of atoms?

Element : Pb, Po, Pr and Pt

• (1) Po
• (2) Pr
• (3) Pb
• (4) Pt

Which of the following statements are correct?
A. The process of the addition an electron to a neutral gaseous atom is always exothermic
B. The process of removing an electron from an isolated gaseous atom is always endothermic
C. The 1st ionization energy of the boron is less than that of the beryllium
D. The electronegativity of C is 2.5 in \( CH_4 \) and \( CCl_4 \)
E. Li is the most electropositive among elements of group 1
Choose the correct answer from the options given below

• (1) B and C only
• (2) A, C and D only
• (3) B and D only
• (4) B, C and E only

Which of the following properties will change when system containing solution 1 will become solution 2 ?

• (1) Molar heat capacity
• (2) Density
• (3) Concentration
• (4) Gibbs free energy

Number of molecules from below which cannot give iodoform reaction is:
Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol

• (1) 2
• (2) 4
• (3) 3
• (4) 2

Identify [A], [B], and [C], respectively in the following reaction sequence :

• (1)
• (2)
• (3)
• (4)

In the following reactions, which one is NOT correct?

• (1)
• (2)
• (3)
• (4)

The correct order of the complexes
[5pt] \([Co(NH_3)_5(H_2O)]^{3+}\) (A),
[3pt] \([Co(NH_3)_6]^{3+}\) (B),
[3pt] \([Co(CN)_6]^{3-}\) (C),
[3pt] \([CoCl(NH_3)_5]^{2+}\) (D)
[5pt]
in terms of wavelength of light absorbed is:

• (1) D \(>\) A \(>\) B \(>\) C
• (2) C \(>\) B \(>\) D \(>\) A
• (3) D \(>\) C \(>\) B \(>\) A
• (4) C \(>\) B \(>\) A \(>\) D

In the following system, \( PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g) \) at equilibrium, upon addition of xenon gas at constant T and p, the concentration of

• (1) \( PCl_5 \) will increase
• (2) \( Cl_2 \) will decrease
• (3) \( PCl_5 \), \( PCl_3 \) and \( Cl_2 \) remain constant
• (4) \( PCl_3 \) will increase

2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is: (Given: Ebullioscopic constant of water = \( 0.52 \, K kg mol^{-1} \))

• (1) 379.2 K
• (2) 377.3 K
• (3) 375.3 K
• (4) 277.3 K

Which compound would give 3-methyl-6-oxoheptanal upon ozonolysis ?

• (1)
• (2)
• (3)
• (4)

Match the LIST-I with LIST-II
LIST-I                              LIST-II

A. \( PF_5 \)                  I. \( dsp^2 \)

B. \( SF_6 \)                  II. \( sp^3d \)

C. \( Ni(CO)_4 \)           III. \( sp^3d^2 \)

D. \( [PtCl_4]^{2-} \)     IV. \( sp^3 \)

Choose the correct answer from the options given below :

• (1) A-II, B-III, C-IV, D-I
• (2) A-IV, B-I, C-II, D-III
• (3) A-I, B-II, C-III, D-IV
• (4) A-III, B-I, C-IV, D-II

The least acidic compound, among the following is

• (1) D
• (2) A
• (3) B
• (4) C

Correct order of limiting molar conductivity for cations in water at 298 K is :

• (1) \( H^+ > K^+ > Ca^{2+} > Mg^{2+} \)
• (2) \( H^+ > Ca^{2+} > Mg^{2+} > K^+ \)
• (3) \( Mg^{2+} > H^+ > Ca^{2+} > K^+ \)
• (4) \( H^+ > Na^+ > Ca^{2+} > Mg^{2+} > K^+ \)

During estimation of Nitrogen by Dumas' method of compound X (0.42 g) :


mL of \( N_2 \) gas will be liberated at STP. (nearest integer)
\text{(Given molar mass in g mol^{-1\text{ : C : 12, H : 1, N : 14)

0.5 g of an organic compound on combustion gave 1.46 g of \( CO_2 \) and 0.9 g of \( H_2O \). The percentage of carbon in the compound is ______ (Nearest integer)
\text{(Given : Molar mass (in g mol^{-1\text{) C : 12, H : 1, O : 16)

The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is ______ \( FeCl_3 + KOH + H_2C_2O_4 \rightarrow A \)

Given: \( \Delta H_f^0 [C(graphite)] = 710 \) kJ mol⁻¹ \( \Delta_c H^0 = 414 \) kJ mol⁻¹ \( \Delta_{H-H}^0 = 436 \) kJ mol⁻¹ \( \Delta_{C-H}^0 = 611 \) kJ mol⁻¹
{The \Delta H_{C=C^0 \text{ for CH_2=CH_2 \text{ is ______ \text{ kJ mol^{-1 \text{ (nearest integer value)

Consider the following reactions \( A + HCl + H_2SO_4 \rightarrow CrO_2Cl_2 + Side Products \)
Little amount \( CrO_2Cl_2(vapour) + NaOH \rightarrow B + NaCl + H_2O \) \( B + H^+ \rightarrow C + H_2O \)
The number of terminal 'O' present in the compound 'C' is ______