AkshitPareek2004/jee-question-analyzer-data huggingface dataset:
Subject: Physics
A closed container of volume \( 0.02 \mathrm{m}^{3} \)
contains a mixture of neon and argon gases at a temperature of \( 27^{0} \mathrm{C} \) and at a
pressure of \( 1 \times 10^{5} N / m^{2} . \) The total mass
of the mixture is 28 g. If the gram molecular weights of neon and
argon are 20 and 40 respectively, the masses of the individual gases in the
container are
respectively(assuming them to be ideal) \( [\mathrm{R}=8.314 \mathrm{J} / \mathrm{mol} \mathrm{K}] \)
\( \mathbf{A} \cdot 16 \mathrm{gm}, 12 \mathrm{gm} \)
B. \( 4 \mathrm{gm}, 24 \mathrm{gm} \)
\( \mathbf{c} \cdot 6 \mathrm{gm}, 22 \mathrm{gm} \)
D. \( 12 \mathrm{gm}, 16 \mathrm{gm} \)
Subject: Maths
If two tangents are drawn at the end points of two radii that are inclined at
an angle of \( 110^{\circ} . \) Find the angle between
the tangents.
\( \mathbf{A} \cdot 110^{\circ} \)
B. 55
\( c \cdot 70^{\circ} \)
D. \( 20^{\circ} \)
Subject: Physics
One half mole each of nitrogen, oxygen and carbon dioxide are mixed in
enclosure of volume 5 litres and
temperature \( 27^{\circ} \mathrm{C} . \) The pressure exerted by mixture is \( \left(\boldsymbol{R}=\mathbf{8 . 3 1} \boldsymbol{J} \boldsymbol{m o l}^{-1} \boldsymbol{K}^{-1}\right) \)
A \( \cdot 7.48 \times 10^{5} \mathrm{N} \mathrm{m}^{-2} \)
B. \( 4 \times 10^{5} \mathrm{N} \mathrm{m}^{-2} \)
\( \mathbf{c} \cdot 6 \times 10^{5} \mathrm{N} m^{-2} \)
D. \( 3 \times 10^{5} \mathrm{N} m^{-2} \)
Subject: Maths
\( \sim(p \leftrightarrow q) \) is equivalent to
\( \mathbf{A} \cdot \sim p \wedge \sim q \)
\( \mathbf{B} \cdot \sim p \vee \sim q \)
\( \mathbf{c} \cdot(p \wedge \sim q) \vee(\sim p \wedge q) \)
D. none of these
Subject: Physics
A horizontal board of negligible mass supports a mass weighing \( 20 N \) at a
distance of \( 2 m \) from the point \( A \)
Calculate the weight which must be
placed at point \( B \), which is \( 5 m \) from
point \( A, \) in order to keep the board in
rotational equilibrium?
A. \( 4 N \)
B. \( 8 N \)
\( c .10 N \)
D. \( 40 N \)
E. \( 60 N \)
Subject: Physics
Carbon, Silicon, and Germanium atoms have four valence electrons each. Their
valence and conduction bands are
separated by energy band gaps
represented by \( (E g)_{C},(E g)_{S i}, \) and
\( (E g)_{G e} \) respectively. Which one of the following relationships is true in their
case:
A \( \cdot(E g)_{C}<(E g)_{G e} \)
в. \( (E g)_{c}>(E g)_{S i} \)
c. \( (E g)_{C}=(E g)_{S i} \)
D. \( (E g)_{C}<(E g)_{S i} \)
Subject: Chemistry
Formation of ammonium sulphate from ammonia and dil sulphuric acid is given by :
\( \mathbf{A} \cdot 3 N H_{3}+H_{2} S O_{4} \rightarrow\left(2 N H_{4}\right)_{2} S O_{4} \)
B \( \cdot 2 N H_{3}+H_{2} S O_{4} \rightarrow\left(N H_{4}\right)_{2} S O_{4} \)
\( \mathbf{c} \cdot 2 N H_{3}+3 H_{2} S O_{4} \rightarrow\left(N H_{4}\right)_{2} S O_{4} \)
\( \mathrm{D} \cdot 2 \mathrm{NH}_{3}+2 \mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \)
Subject: Physics
A simple pendulum oscillates freely between points \( A \) and \( B \) We now put a peg (nail) at some point \( C \)
as shown. As the pendulum moves from
At to the right, the string will bend at \( C \) and the pendulum will go to its extreme point D. Ignoring friction, the point D.
A. Will lie on the line AB
B. Will lie above the line AB
c. will lie below the line \( A B \)
D. Will concide with B
Subject: Physics
A square loop \( A B C D, \) carrying a
current \( \boldsymbol{I}_{1}, \) is placed near and coplanar
with a long straight conductor \( \boldsymbol{X} \boldsymbol{Y} \)
carrying a current \( I_{1} \), as shown in
figure. The net force on the loop will be
A \( \cdot \frac{\mu_{0} I_{1} I_{2}}{2 \pi} \)
B. \( \frac{\mu_{0} I_{1} I_{2} L}{2 \pi} \)
c. \( \frac{2 \mu_{0} I_{1} I_{2} L}{2 \pi} \)
D. \( \frac{2 \mu_{0} I_{1} I_{2}}{3 \pi} \)
Subject: Physics
The exact equation of motion of the
bead along the thread is
\( ^{\mathbf{A}} \cdot_{m} \frac{d^{2} x}{d t^{2}}=--\frac{k 2 Q q x}{\left(x_{0}^{2}+R^{2}\right)^{3 / 2}} \)
B. \( \quad m \frac{d^{2} x}{d t^{2}}=--\frac{k Q q x}{\left(x_{0}^{2}+R^{2}\right)^{3 / 2}} \)
\( ^{\mathbf{C}} \cdot \quad m \frac{d^{2} x}{d t^{2}}=--\frac{k 2 Q q x}{\left(x_{0}^{2}-R^{2}\right)^{3 / 2}} \)
\( ^{\mathrm{D}} \cdot \quad m \frac{d^{2} x}{d t^{2}}=--\frac{k Q q x}{\left(x_{0}^{2}-R^{2}\right)^{3 / 2}} \)
Subject: Maths
Find \( A \triangle B \) and draw Venn diagram
when:
\( \boldsymbol{A}=\{\mathbf{1}, \mathbf{2}, \mathbf{3}, \mathbf{4}, \mathbf{5}\} \) and \( \boldsymbol{B}=\{\mathbf{2}, \mathbf{4}\} \)
Subject: Chemistry
Hydrogen gas is prepared in the laboratory by reacting dilute \( H C l \) with granulated zinc. Following reaction takes place:
\( Z n+2 H C l \rightarrow Z n C l_{2}+H_{2} \)
What would be the volume of hydrogen gas is liberated at STP when 32.65 g of zinc reacts with \( \boldsymbol{H} \boldsymbol{C l} \) ?
A . \( 10.03 \mathrm{L} \)
B. 11.35 L
c. \( 11.57 \mathrm{L} \)
D. 9.53 L
Subject: Maths
If \( A \) and \( B \) are two event such that, \( P(A)=\frac{6}{11}, P(B)=\frac{5}{11} \) and \( P(A \cup \)
\( B)=\frac{7}{11}, \) find \( P(A r \)
\( \boldsymbol{B}), \boldsymbol{P}(\boldsymbol{A} / \boldsymbol{B}), \boldsymbol{P}(\boldsymbol{B} / \boldsymbol{A}) \)
Subject: Maths
If \( \boldsymbol{O P}=2 \hat{\boldsymbol{i}}+\boldsymbol{3} \hat{\boldsymbol{j}}-\hat{\boldsymbol{k}} \) and \( \boldsymbol{O} \boldsymbol{Q}=\boldsymbol{3} \hat{\boldsymbol{i}}- \)
\( 4 \hat{j}-2 \hat{k} \) then the modulus \( \bar{P} Q \) is
A \( \cdot \sqrt{13} \)
B. \( \sqrt{51} \)
c. \( \sqrt{39} \)
D. \( \sqrt{67} \)
Subject: Physics
Consider a light beam incident from air to a glass slab at Brewster's angle as
shown in figure. A polaroid is placed in the path of the emergent ray at point \( \mathrm{P} \)
and rotated about an axis passing
through the centre and perpendicular to
the plane of the polaroid.
A. For a particular orientation there shall be darkness as observed through the polaroid
B. The intensity of light as seen through the polaroid shall be independent of the rotation
c. The intensity of light as seen through the polaroid shall go through a minimum but not zero for two orientations of the polaroid
D. The intensity of light as seen through the polaroid shall go through a minimum for four orientations of the polaroid.
Subject: Maths
The circles \( \boldsymbol{x}^{2}+\boldsymbol{y}^{2}-\boldsymbol{4} \boldsymbol{x}+\boldsymbol{4} \boldsymbol{y}+\boldsymbol{4}=\mathbf{0} \)
and \( x^{2}+y^{2}-4 x-4 y=0 \)
A. Do not intersect
B. Are not orthogonal
c. Intersect orthogonally
D. concentric
Subject: Chemistry
Both \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{3} \) and \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{4} \) are dibasic
acid. But, equimolar solutions of both acids do not contain equal
concentration of \( \boldsymbol{H}^{+} \) ions. Give reason.
Subject: Maths
Write down the values of:
\( (\sqrt{5}+\sqrt{6})^{2} \)
A. \( \sqrt{5}+\sqrt{6}+\sqrt{30} \)
B. \( 11+2 \sqrt{30} \)
c. \( 11+\sqrt{30} \)
D. \( \sqrt{11}+60 \)
Subject: Chemistry
If the true value for a result is \( 4.00 \mathrm{cm} \)
and a student takes two measurements
and reports the result as \( 3.94 \mathrm{cm} \) and
\( 3.95 \mathrm{cm}, \) then these values are:
A. Precise and accurate
B. Precise but are not accurate
c. Accurate but not precise
D. Neither accurate nor precise
Subject: Maths
If \( \boldsymbol{A}=\left[\begin{array}{cc}\mathbf{3} & \mathbf{- 2} \\ \mathbf{5} & \mathbf{4}\end{array}\right], \boldsymbol{B}=\left[\begin{array}{cc}\mathbf{1} & \mathbf{4} \\ \mathbf{6} & -\mathbf{7}\end{array}\right], \) then
find the matrix \( A-4 B+7 I \), where lis
the unit matrix of order 2
\( =\left(\begin{array}{rr}3 & -2 \\ 5 & 4\end{array}\right], \mathbf{B}=\left[\begin{array}{rr}1 & 4 \\ 6 & -7\end{array}\right] \)
Subject: Chemistry
Which one of the following statements
is correct?
A. 2 s orbital is spherical with two nodal planes
B. The de Broglie wavelength ( \( \lambda \) ) of a particle of mass 'm' and velocity 'V' is equal to mV/h
C. The principal qantum number (n) indicates the shape of the orbital
D. The electronic configuration of phosphorous is given by [Ne] \( 3 s^{2} 3 p_{x}^{1} 3 p_{y}^{1} 3 p_{z}^{1} \)
Subject: Physics
Which of the following is NOT true for
comets?
A. Some comets are believed to have originated in a region near the edge of the orbit of the outer planets in our solar system called the "scattered disk" that overlaps a region called the Kuiper belt
B. Some comets are believed to have originated in the outer-most region associated with our solar system, called the Oort cloud
C. The tail of a comet gives the comet its propulsion, like rocket fuel out the back end of a rocket
D. The tails of comets generally point away from the sun and are made of two major parts-a dusty part (that curves a bit) and an ionic part
E. Comets often contain significant amounts of water
Subject: Physics
An iron cylinder of radius \( 1.4 \mathrm{cm} \) and
length \( 8 \mathrm{cm} \) is found to weigh \( 369.6 \mathrm{g} \)
Calculate the density of iron.
A \( \cdot 7500 \mathrm{kg} / \mathrm{m}^{3} \)
B. \( 7500 g / c m^{3} \)
c. \( 7500 k g / c m^{3} \)
D. None of the above
Subject: Physics
What current density is required to
provide a pressure difference of 1 atm
between any two points if \( B=2.2 T \) and
\( l=35 m m \)
A \( .1 .4 \times 10^{3} \mathrm{Am}^{-2} \)
в. \( 7.2 \times 10^{6} \) Ат \( ^{-} \)
c. \( 1.3 \times 10^{5} \mathrm{Am}^{-2} \)
D. \( 1.3 \times 10^{6} \mathrm{Am}^{-2} \)
Subject: Physics
A box, when hung from a spring balance shows a reading of \( 50 \mathrm{kg} \). If the same box is hung from the same spring balance inside an evacuated chamber,
the reading on the scale will be.
A. \( 50 \mathrm{kg} \) because the mass of the box remains unchanged
B. \( 50 \mathrm{kg} \) because the effect of the absence of the atmosphere will be identical on the box and the spring balance
c. Less than \( 50 \mathrm{kg} \) because the weight of the column of air on the box will be absent
D. More than 50kg because the atmospheric buoyancy force will be absent
Subject: Physics
For given logic diagram, output \( \boldsymbol{F}=\mathbf{1} \)
then inputs are:
\( \mathbf{A} \cdot A=0, B=0, C=0 \)
\( \mathbf{B} \cdot A=0, B=1, C=0 \)
\( \mathbf{c} \cdot A=1, B=1, C=1 \)
\( \mathbf{D} \cdot A=0, B=0, C=1 \)
Subject: Maths
Assertion
\( \sin ^{-1}\left[x-\frac{x^{2}}{2}+\frac{x^{3}}{4} \dots\right]=\pi / 2 \)
\( \cos ^{-1}\left[x^{2}-\frac{x^{4}}{2}+\frac{x^{6}}{4} \ldots .\right] \) for \( 0<|x|< \)
\( \sqrt{2} \) has a unique solution.
Reason
\( \tan ^{-1} \sqrt{x(x+1)}+ \)
\( \sin ^{-1} \sqrt{x^{2}+x+1}=\pi / 2 \) has no
solution for \( -\sqrt{2}<x<0 \)
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
Subject: Maths
The diagonals of rhombus are \( 8 \mathrm{cm} \) and
\( 10 \mathrm{cm} \) Then the area of the rhombus is
\( \mathbf{A} \cdot 64 \mathrm{cm}^{2} \)
В. \( 100 \mathrm{cm}^{2} \)
\( c \cdot 80 c m^{2} \)
D. \( 40 \mathrm{cm}^{2} \)
Subject: Chemistry
An ideal gas is allowed to expand both reversibly and irreversibly in an isolated
system. If \( T_{i} \) is the initial temperature
and \( T_{f} \) is the final temperature, which of the following is correct?
\( \mathbf{A} \cdot T_{f}>T_{i} \) for reversible process but \( T_{f}=T_{i} \) for irreversible process
B . \( \left(T_{f}\right) \) rev \( =\left(T_{f}\right) \) irrev
C. \( T_{f}=T_{i} \) for both reversible and irreversible process
D. \( \left(T_{i}\right) \) irrev \( >\left(T_{f}\right) \) rev
Subject: Chemistry
Multiple Choice Questions Photochemical smog consists of
A. \( S O_{2}, C O_{2} \) hydrocarbons
B. \( O_{3}, S O_{2} \) hydrocarbons
\( \mathrm{c} \cdot O_{3}, P A N, N O_{X} \)
D. \( S O_{2}, P A N, \) smoke
Subject: Chemistry
The vapour pressure of a pure liquid \( \boldsymbol{A} \)
is 70 torr at \( 27^{\circ} \mathrm{C} \). It forms an ideal
solution with another liquid \( B \). The mole
fraction of \( B \) is 0.2 and total vapour
pressure of the solution is 84 torr at
\( 27^{\circ} \mathrm{C} . \) The vapour pressure of pure
liquid \( B \) at \( 27^{\circ} \mathrm{C} \) is:
A . 14
B. 56
\( c .140 \)
D. 70
Subject: Maths
State true or false:
In the figure, given below, \( 2 A D=A B \)
\( P \) is mid-point of \( A B . Q \) is mid-point of
DR and \( \boldsymbol{P R} \| \boldsymbol{B S}, \) then \( \boldsymbol{A Q} \| \boldsymbol{B S} \)
A. True
B. False
Subject: Maths
Assertion
If \( \boldsymbol{P}(\boldsymbol{A} / \boldsymbol{B})>\boldsymbol{P}(\boldsymbol{A}) \) then. \( \boldsymbol{P}(\boldsymbol{B} / \boldsymbol{A})> \)
\( \boldsymbol{P}(\boldsymbol{B}) \)
Reason
fevents \( A \& B \) are dependent, then \( \boldsymbol{P}(\boldsymbol{A} / \boldsymbol{B})=\frac{\boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B})}{\boldsymbol{P}(\boldsymbol{B})} \)
A. Both Assertion \& Reason are individually true \& Reason is correct explanation of Assertion
B. Both Assertion \& Reason are individually true but Reason is not the ,correct (proper) explanation of Assertion
c. Assertion is true but Reason is false
D. Assertion is false but Reason is true
Subject: Chemistry
For the reaction
\( \boldsymbol{P C l}_{5}(\boldsymbol{g}) \rightleftharpoons \boldsymbol{P} \boldsymbol{C l}_{3}(\boldsymbol{g})+\boldsymbol{C l}_{2}(\boldsymbol{g}) \)
The forward reaction at constant
temperature is favoured by:
A. introducing inert gas at constant volume
B. introducing chlorine gas at constant volume
c. introducing inert gas at constant pressure
D. none of the above
Subject: Chemistry
8
directions and collide with each other
and with the wall of the container. It is
difficult to determine the speed of an
individual molecule but it has become
possible to work out the distribution of molecules among different molecular
speeds. This is known as Maxwell
Boltzmann distribution.

Consider the following graph about
Maxwell's distribution of speeds at two
different temperatures \( T_{1} \) and \( T_{2} \)
Relation between \( T_{1} \) and \( T_{2} \) is
A \( \cdot T_{1}=T_{2} \)
\( \mathbf{B} \cdot T_{1}>T_{2} \)
\( \mathbf{c} \cdot T_{1}<T_{2} \)
D. Cannot be predicted
Subject: Physics
airplane shaped cars attached to steel
rods. Each rod has a length of \( 20.0 \mathrm{m} \)
and a cross-sectional area of \( 8.00 \mathrm{cm}^{2} \)
Young's modulus for steel is \( 2 \times \)
\( 10^{11} N / m^{2} \)
When operating, the ride has a
maximum angular speed of \( \sqrt{19 / 5} \) rad/s. How much is the rod stretched (in
\( \mathrm{mm} \) ) then?
A . \( 0.38 \mathrm{mm} \)
B. \( 0.55 \mathrm{mm} \)
\( c \cdot 0.45 \mathrm{mm} \)
D. 0.34
Subject: Physics
The radius of gyration of a uniform rod of length \( l \) and mass \( M \) about an axis
passing through its centre and perpendicular to its length is:
A \( \cdot \frac{l^{2}}{12} \)
в. \( \frac{l}{2 \sqrt{3}} \)
\( c \cdot \frac{l}{2} \)
D. \( \frac{l}{\sqrt{2}} \)
Subject: Chemistry
Correct pair of compounds which gives blue colouration/precipitate and white
precipitate, respectively, when their Lassaigne's test is separately done is:
A. \( N H_{2} N H_{2} . H C l \) and \( C l C H_{2} C O O H \)
B. \( N H_{2} C S N H_{2} \) and \( P H C H_{2} C l \)
c. \( N H_{2} N H_{2} C O O H \) and \( N H_{2} C O N H_{2} \)
D.
and
Subject: Maths
In given figure, \( P B \) and \( Q \) a are perpendiculars to segment AB. If PO=5 \( \mathrm{cm}, \mathrm{Q} \mathrm{O}=7 \mathrm{cm} \) and Area \( \triangle \boldsymbol{P O B}= \)
\( 150 c m^{2} \) find the area of \( \triangle Q O A \)
Subject: Physics
Assertion : When a particle moves in a
circle with a uniform speed, its velocity and acceleration both changes.

Reason : The centripetal acceleration in circular motion is dependent on angular velocity of the body.
A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B. If both Assertion and Reason are true but the Reason i not the correct explanation of the Assertion
c. If Assertion is true statement but Reason is false
D. If both Assertion and Reason are false statements
Subject: Maths
Let \( \Gamma \) denote a curve \( y=f(x) \) which is
in the first quadrant and let the point
(1,0) lie on it. Let the tangent to \( \Gamma \) at a
point \( \boldsymbol{P} \) intersect the \( \mathbf{y} \) -axis at \( \boldsymbol{Y}_{\boldsymbol{P}} . \) If
\( P Y_{P} \) has length 1 for each point \( P \) on \( \Gamma \)
Then which of the following options
is/are correct?
This question has multiple correct options
A \( y=-\ln \left(\frac{1+\sqrt{1-x^{2}}}{x}\right)+\sqrt{1-x^{2}} \)
B. \( x y^{\prime}+\sqrt{1-x^{2}}=0 \)
C \( \cdot x y^{\prime}-\sqrt{1-x^{2}}=0 \)
D. \( y=\ln \left(\frac{1+\sqrt{1-x^{2}}}{x}\right)-\sqrt{1-x^{2}} \)
Subject: Physics
A particular star (assuming it as a black body) has a surface temperature
of about \( 5 \times 10^{4} \) K.The wave length in
nano-meters at which its radiation
becomes maximum is :
\( (b=0.0029 m K) \)
\( A \cdot 48 \)
B. 58
\( c \cdot 60 \)
D. 70
Subject: Chemistry
Assertion
Nuclide \( _{13}^{30} A l \) is less stable than \( _{20}^{40} C a \)
Reason

Nuclide having odd number of protons and neutrons are generally unstable.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
Subject: Maths
For a real number \( x \) let \( [x] \) denote the
largest number less than or equal to \( x \) for \( \boldsymbol{x} \epsilon \boldsymbol{R} \) let \( \boldsymbol{f}(\boldsymbol{x})=[\boldsymbol{x}] \sin \pi \boldsymbol{x} . \) Then
A. fis differentiable on R
B. fis symmetric about the line \( x=0 \)
\( ^{\mathbf{c}} \cdot \int_{-3}^{3} f(x) d x=0 \)
D. For each real \( \alpha \), the equation \( f(x)-\alpha=0 \) has infinitely many roots.
Subject: Maths
if \( \boldsymbol{f} \) and \( \boldsymbol{g} \) are real function defined by
\( \boldsymbol{f}(\boldsymbol{x})=\mathbf{2} \boldsymbol{x}-\mathbf{1} \) and \( \boldsymbol{g}(\boldsymbol{x})=\boldsymbol{x}^{2}, \) then
A. \( (3 f-2 g)(1)=1 \)
В. \( (f g)(2)=10 \)
C \( \cdot g^{3}(2)=128 \)
D \( \cdot\left(\frac{\sqrt{f}}{g}\right)(2)=\frac{\sqrt{3}}{2} \)
Subject: Physics
A wire of length 5 m is twisted through
\( 30^{\circ} \) at the free end. If the radius of wire
is 1 m \( m \), the shearing strain in the wire
is:
\( A \cdot 30 \)
B . \( 0.36^{\prime} \)
\( c \cdot 1^{c} \)
D. 0.18
Subject: Chemistry
An isotone of \( _{32}^{76} \) Ge is:
This question has multiple correct options
\( \mathbf{A} \cdot_{32}^{77} G e \)
\( \mathbf{B} \cdot_{33}^{77} A s \)
\( \mathbf{c} \cdot_{34}^{77} S e \)
\( \mathbf{D} \cdot_{34}^{78} S e \)
Subject: Physics
A body accelerates uniformly from rest to a velocity of \( 1 \mathrm{m} s^{-1} \) in 15 second. In
what time the kinetic energy of the body will be \( \frac{2}{9} J .[\text { Take mass of body as } 1 \mathrm{kg}] \)
A. 4 s
B. 8s
\( c \cdot 10 s \)
D. 12s
Subject: Biology
Match the followings in column I with
column II and choose the correct
combination
\( \begin{array}{llll} & \text { Column I } & & \text { Column II } \\ \text { A } & \text { Xylem vessels } & 1 & \begin{array}{l}\text { Store food } \\ \text { materials }\end{array} \\ \text { B } & \begin{array}{l}\text { Xylem } \\ \text { tracheids }\end{array} & \text { 2 } & \begin{array}{l}\text { Obliterated } \\ \text { lumen }\end{array} \\ \text { D } & \text { Xylem fibre } & \text { 3 } & \begin{array}{l}\text { Perforated } \\ \text { plate }\end{array} \\ \text { D } & \begin{array}{l}\text { Xylem } \\ \text { parenchyma }\end{array} & \text { 4 } & \begin{array}{l}\text { Chisel-like } \\ \text { ends }\end{array}\end{array} \)
A \( \cdot A-4, B-3, C-2, D-1 \)
B. A- 3, B- 2, C-1, D-4
C. \( A-2, B-1, C-4, D-3 \)
D. A-1, B-2, C-3, D-4
E. A- \( 3, \) B- 4, C- 2, D-
Subject: Chemistry
Assertion
Bohr had to postulate that the electrons in stationary orbits around the nucleus
do not radiate.
Reason
According to classical physics all moving electrons radiate.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
Subject: Physics
A source \( S \) is kept directly behind the
slit \( S, \) in a double-slit apparatus. Find
the phase difference at a point \( O w h i c h \)
is equidistant from \( s 18 \) s2 What will be
the phase difference at \( P \) if a liquid of refraction index \( \mu \) is filled. (wavelength
of light in air is / due to the source) \( (\lambda<<d, d<<D,\langle>>d) \)
A. between the screen and the slits
B. between the slits \( \& \) the source S. In this case find the minimum distance between the points on the screer where the intensity is half the maximum intensity on the screen
c. Beyond the slits
D. None of these
Subject: Physics
toppr
Q Type your question-
a. The angle between the edge along
the \( z \) -axis (line ab) and the diagonal
from the origin to the opposite corner
(line ad).
b. The angle between line \( a c \) (the
diagonal of a face) and line \( a d \)
A \( \cdot \) a. \( \cos ^{-1} \frac{1}{\sqrt{2}} \)
b. \( \cos ^{-1} \frac{\sqrt{2}}{\sqrt{3}} \)
B. a. \( \cos ^{-1} \frac{1}{\sqrt{3}} \)
c. a \( \cos ^{-1} \frac{1}{\sqrt{3}} \)
b. \( \cos ^{-1} \frac{\sqrt{3}}{\sqrt{3}} \)
D. a. \( \cos ^{-1} \frac{2}{\sqrt{3}} \)
Subject: Maths
If \( f(x)=\frac{x}{1+x \tan x}, x \in\left(0, \frac{\pi}{2}\right) \) then
This question has multiple correct options
A. \( f(x) \) has exactly one point of minima
B. \( f(x) \) has exactly one point of maxima
C \( f(x) \) is many one in \( \left(0, \frac{\pi}{2}\right) \)
D. \( f(x) \) has maximum at \( x_{0} \) where \( x_{0}=\cos x_{0} \)
Subject: Chemistry
Write the balanced equation for the
following:Bromoethane and an aqueous solution
of sodium hydroxide.
A. \( C_{2} H_{5} B r+N a O H \rightarrow C_{2} H_{6} \)
в. \( C_{2} H_{5} B r+N a O H \rightarrow C_{2} H_{5} O H \)
c. \( C_{2} H_{5} B r+N a O H \rightarrow C_{2} H_{4} O \)
D. \( C_{2} H_{5} B r+N a O H \rightarrow C_{2} H_{2} O \)
Subject: Maths
A line is perpendicular to the plane \( x+ \)
\( 2 y+2 z=0 \) and passes through
\( (0,1,0) . \) The perpendicular distance of this line from the origin is
A \( \frac{\sqrt{5}}{3} \)
B. \( \frac{\sqrt{7}}{3} \)
\( c \cdot \frac{2}{3} \)
D. 3
Subject: Chemistry
How many moles of \( H C \) OONa must
be added to \( 1 L \) of \( 0.1 M \) HCOOH to
prepare a buffer solution with a \( p H \) of
\( \mathbf{3 . 4 ?} \)
(Given: \( \boldsymbol{K}_{\boldsymbol{a}} \) for \( \boldsymbol{H} \boldsymbol{C O O H}=\boldsymbol{2} \times \mathbf{1 0}^{-4} \mathbf{)} \)
A . 0.01
B. 0.05
\( c .0 . \)
D. 0.2
Subject: Physics
The angle between force \( \overrightarrow{\boldsymbol{F}}=(\mathbf{3} \hat{\boldsymbol{i}}+ \)
\( 4 \hat{j}-5 \hat{k}) \) unit and displacement \( \overrightarrow{\boldsymbol{d}}= \) \( (5 \hat{i}+4 \hat{j}+3 \hat{k}) \) unit is
\( A \cdot \cos ^{-1}(0.16) \)
B. \( \cos ^{-1}(0.32) \)
\( \mathbf{c} \cdot \cos ^{-1}(0.24) \)
D \( \cdot \cos ^{-1}(0.64) \)
Subject: Physics
A nuclear transformation is denoted by
\( X(n, \alpha) \rightarrow_{3} L i^{7} . \) The nucleus of element \( X \)
is
\( A \cdot_{6} C^{12} \)
B \( \cdot_{5} B^{10} \)
\( \mathbf{c} \cdot_{5} B^{9} \)
\( \mathbf{D} \cdot_{4} B e^{1} \)
Subject: Chemistry
A solution of 0.2 mole \( \mathrm{Kl}(\alpha=100 \%) \) in
1000 g water freezes at \( T_{1}^{\circ} \) C. Now to
this solution 0.1 mole \( H g I_{2} \) is added
and the resulting solution freezes at
\( T_{2}^{\circ} \mathrm{C} . \) Which of the following is correct?
A \( \cdot T_{1}=T_{2} \)
в. \( T_{1}>T_{2} \)
c. \( T_{1}<T_{2} \)
D. can't be prediced
Subject: Physics
The large bright stars with a cool
surface of \( 2000^{\circ} \mathrm{C} \) to \( 3000^{\circ} \mathrm{C} \), formed
during the later stages of the evolution
of a star like the sun as it runs out of
\( H_{2} \) fuel at its center
are
\( \mathbf{A} \cdot \) red dwarf
c. red giants