AkshitPareek2004/jee-question-analyzer-data huggingface dataset:
Subject: Physics
Assertion
Neutrons penetrate matter more readily
as compared to protons.
Reason
Neutrons are slightly more massive
than protons.
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
In the tigure shown water Is thled in a
symmetrical container. Four pistons of
equal area \( A \) are used at the four
opening to keep the water in
equilibrium. Now an additional force \( \boldsymbol{F} \)
is applied at each piston. The increase
in the pressure at the centre of the
container due to this addition is
\( \mathbf{A} \cdot \frac{F}{A} \)
B. \( \frac{2 F}{A} \)
\( c \cdot \frac{4 F}{A} \)
\( D \)
Subject: Maths
n right angled triangle \( A B C \), right angled at \( C, M \) is the mid-point of hypotenuse \( A B . C \) is joined to \( M \) and
produced to a point \( D \) such that
\( D M=C M . \) Point \( D \) is joined to point
B. Show that:
(i) \( \triangle A M C \cong \triangle B M D \)
(ii) \( \angle D B C \) is a right angle.
(iii) \( \triangle D B C \cong \triangle A C B \)
\( (\mathrm{iv}) C M=\frac{1}{2} A B \)
Subject: Maths
Solve \( \left|\begin{array}{ccc}\mathbf{1} & \mathbf{1} & \mathbf{1} \\ \boldsymbol{a} & \boldsymbol{b} & \boldsymbol{c} \\ \boldsymbol{a}^{\mathbf{3}} & \boldsymbol{b}^{\mathbf{3}} & \boldsymbol{c}^{\mathbf{3}}\end{array}\right|= \)
\( (\boldsymbol{a}-\boldsymbol{b})(\boldsymbol{b}-\boldsymbol{c})(\boldsymbol{c}-\boldsymbol{a})(\boldsymbol{a}+\boldsymbol{b}+\boldsymbol{c}) \)
Subject: Physics
Two parallel rails of a railway track
insulated from each other and with the
ground are connected to a millivoltmeter. The distance between
the rails is one metre. A train is
traveling with a velocity of \( 72 k m / h \)
along the track. The reading of the millivoltmeter \( (\text { in } \boldsymbol{m} \boldsymbol{V}) \) is :
(Vertical component of the earths
magnetic induction is \( \left.2 \times 10^{-5} T\right) \)
A. 144
в. 0.72
c. 0.4
D. 0.2
Subject: Maths
If \( \vec{V}_{1}=\hat{i}-2 \hat{j}+3 \hat{k} \) and \( \vec{V}_{2}=a \hat{i}+b \hat{j}+ \)
\( \boldsymbol{c} \hat{\boldsymbol{k}} \) where \( \boldsymbol{a}, \boldsymbol{b}, \boldsymbol{c} \in\{-\mathbf{1}, \boldsymbol{0}, \boldsymbol{1}, \boldsymbol{2}, \boldsymbol{3}\} \) then
find the numbers of non-zero vectors \( \vec{V}_{2} \)
which are normal to \( \vec{V}_{1} \)
Subject: Chemistry
toppr
Q Type your question
A \( x \)
reaction but not haloform reaction,
whereas \( S \) undergoes haloform reaction
but not Cannizzaro reaction.
(i) \( P \frac{i) O_{3} / C H_{2} C l_{2}}{i i) Z n / H_{2} O} \underset{\left(C_{8} H_{8} O\right)}{Q} \)
(ii) \( \boldsymbol{R} \frac{i) \boldsymbol{O}_{3} / \boldsymbol{C} \boldsymbol{H}_{3} \boldsymbol{C l}_{2}}{\boldsymbol{i} \boldsymbol{i}) \boldsymbol{Z} \boldsymbol{n} / \boldsymbol{H}_{2} \boldsymbol{O}} \boldsymbol{S}_{\left(\boldsymbol{C}_{8} \boldsymbol{H}_{8} \boldsymbol{O}\right)} \)
The option(s) with suitable
combination of \( \boldsymbol{P} \) and \( \boldsymbol{R} \), respectively, is
\( (\operatorname{are}) \)
This question has multiple correct options
\( A \)
B.
c.
D.
Subject: Chemistry
An organic compound was used with sodium metal and extracted with
distilled water. On adding freshly
prepared \( F e S O_{4} \) solution followed by
the addition of \( F e C l_{3} \) and dil. \( H C l \) used
greenish-blue solution. 0.30 g of the organic compound after kjeldahlisation evolved a gas \( (\mathrm{X}), \) which
was passed on \( 100 \mathrm{ml} \) of \( 0.1 \mathrm{M} H_{2} S O_{4} \)
The excess of acid required \( 20 \mathrm{ml} \) of 0.5 M NaOH for neutralisation. The amount
of acid left after neutralisation
with base is:
\( \mathbf{A} \cdot 10 \mathrm{ml} \)
B. \( 90 \mathrm{ml} \)
c. \( 50 \mathrm{ml} \)
D. \( 80 \mathrm{ml} \)
Subject: Physics
Assertion
Gravitational potential is maximum at infinity.
Reason
Gravitational potential is the amount of
work done to shift a unit mass from
infinity to a given point in gravitational attraction force field.
A. STATEMENT-1 is True, STATEMENT-2 is True
STATEMENT-2 is a correct explanation for STATEMENT1
B. STATEMENT-1 is True, STATEMENT-2 is True STATEMENT-2 is NOT a correct explanation for STATEMENT-1
C. STATEMENT-1 is True, STATEMENT-2 is False
D. STATEMENT-1 is False, STATEMENT-2 is True
Subject: Maths
\( \operatorname{Let} f(x)=\frac{x^{2}-9 x+20}{x-[x]} \) where \( [x] \) is
the greatest integer not greater than \( x \) then
This question has multiple correct options
A \( \cdot \lim _{x \rightarrow 5^{-}} f(x)=0 \)
B . \( \lim _{x \rightarrow 5^{+}} f(x)=1 \)
c. \( \lim _{x \rightarrow 5} f(x) \) does not exists
D. none of these
Subject: Physics
In a coil of area \( 10 \mathrm{cm}^{2} \) and 10 turns with
magnetic field directed perpendicular to the plane and is changing at the rate
of \( 10^{8} \) Gauss/second. The resistance of
the coil is \( 20 \Omega \). The current in the coil
will be
A. \( 0.5 \mathrm{A} \)
B. 5A
\( c . \) 50 A
D . \( 5 \times 10^{8} A \)
Subject: Chemistry
Assertion
Chlorine water must be stored in dark
colored bottles.
Reason
Hypochlorous acid on exposure to sunlight decomposes to \( H_{2} \) and \( C l_{2} \)
gas.
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: Chemistry
Which of these half-reactions
represents an oxidation?
I. \( \boldsymbol{S} \boldsymbol{n}^{\boldsymbol{4}+} \rightarrow \boldsymbol{S} \boldsymbol{n}^{2+} \)
II. \( M n O_{4}^{-} \rightarrow M n^{2+} \)
III. \( \boldsymbol{C l}_{2} \rightarrow \boldsymbol{C l O}_{\mathbf{3}}^{-} \)
A. I only
B. II only
c. III only
D. I and II only
E. II and III only
Subject: Physics
A change of \( 2 x^{-7} C \) moves from the
origin to the point (4,4) with co-
ordinates measured in meters (see
figure). Calculate the work done by the
uniform electric field \( \boldsymbol{E}=(\mathbf{1} . \mathbf{0} \times \)
\( \left.10^{4}\right) \hat{i} N / C \) for each of three paths:
(a) (0,0)\( \rightarrow(4,0) \rightarrow(4,4) \)
(b) \( (0,0) \rightarrow(4,4), \) along the diagonal
\( (c)(0,0) \rightarrow(0,4) \rightarrow(4,4) \)
(d) What is the electrostatic potential
at point (4,4) relative to the origin?
Subject: Chemistry
For the given cell reaction: \( \boldsymbol{F e}^{2+}+ \) \( \boldsymbol{C} \boldsymbol{e}^{4+} \rightleftharpoons \boldsymbol{F} \boldsymbol{e}^{\boldsymbol{3}+}+\boldsymbol{C} \boldsymbol{e}^{\boldsymbol{3}+} . \) The equilibrium
constant is:
(Given: \( \boldsymbol{E}_{C e^{4+} / C e^{3+}}^{\circ}= \)
\( \left.\mathbf{1 . 4 4} \boldsymbol{V} ; \boldsymbol{E}_{\boldsymbol{F} e^{2+} / \boldsymbol{F} e^{3+}}^{\circ}=\mathbf{0 . 6 8} \boldsymbol{V}\right) \)
Subject: Physics
The minimum velocity (in \( \mathrm{m} / \mathrm{s} \) ) with which a car driver must traverse a flat
curve of radius \( 150 \mathrm{m} \) and coefficient of
friction 0.6 to avoid skidding is:
A. \( 60 \mathrm{m} / \mathrm{s} \)
B. 30 \( \mathrm{m} / \mathrm{s} \)
\( c \cdot 15 m / s \)
D. 25 \( \mathrm{m} / \mathrm{s} \)
Subject: Chemistry
For a given reaction, \( \triangle \boldsymbol{H}= \)
\( 35.5 k J m o l^{-1} \) and \( \triangle S= \)
\( 83.6 J K^{-1} \) mol \( ^{-1} . \) The reaction is
spontaneous at: (Assume that \( \triangle \boldsymbol{H} \) and
\( \triangle S \) do not vary with temperature)
\( \mathbf{A} \cdot T>298 K \)
В. \( T<425 K \)
c. \( T>425 K \)
D. All temperatures
Subject: Maths
Let \( \boldsymbol{f}(\boldsymbol{x})= \)
\( \left\{\begin{array}{cc}2 a-x, & \text { if }-a<x<a \\ 3 x-2 a, & \text { if } a \leq x\end{array} . \) Then \right.
which of the following is true?
A. \( f(x) \) is discontinuous at \( x=a \)
B. \( f(x) \) is not differentiable at \( x=a \)
c. \( f(x) \) is differentiable at \( x \geq a \)
D. \( f(x) \) is continuous at all \( x<a \)
Subject: Physics
Transformer \( \rightarrow \) ideal \( \rightarrow \boldsymbol{E}_{\boldsymbol{P}}= \)
\( \mathbf{1 0 0 0} \boldsymbol{V}, \boldsymbol{I}_{\boldsymbol{P}}=\mathbf{5 0 A} \)
\( 220 V \rightarrow 80 \) houses
Resistance of secondary coil will be
A . \( 2 \Omega \)
B. 3\Omega
\( c .1 \Omega \)
D. \( 4 \Omega \)
Subject: Physics
Two blocks \( P \) and \( Q \) of masses \( 0.3 k g \) and 0.4 kg respectively are stuck to each other by some weak glue as shown in the figure. They hang together at the end of a spring with a spring constant \( \boldsymbol{K}=\mathbf{2 0 0} \boldsymbol{N} \boldsymbol{m}^{-1} . \) If the block \( \boldsymbol{Q} \)
suddenly falls free due to the failure of glue, find
(i) period of SHM of block \( \boldsymbol{P} \)
(ii) The amplitude of its SHM
(iii) The total energy of oscillation of the
system.
Subject: Physics
The wire is found to vibrate in the third
harmonic. The maximum emf induced
is
\( A \)
B.
\[
\frac{3(A B) \omega}{k}
\]
\( c \)
\[
\frac{2(A B) \omega}{k}
\]
\( D \)
\[
\frac{(A B) \omega}{k}
\]
E. answer required
Subject: Chemistry
The nitrogen atoms in \( N H_{3}, N H_{2}^{-} \) and
\( N H_{4}^{+} \) are all surrounded by eight electrons. When these species
are arranged according to \( H N H \) bond angle, the correct order is :
A \( . N H_{3}<N H_{2}^{-}<N H_{4}^{+} \)
B. \( N H_{4}^{+}<N H_{2}^{-}<N H_{3} \)
C \( . N H_{3}<N H_{4}^{+}<N H_{2}^{-} \)
D. \( N H_{2}^{-}<N H_{3}<N H_{4}^{+} \)
Subject: Maths
Let \( X \) be a variate taking values
\( x_{1}, x_{2}, \ldots . . x_{n} \) and \( Y \) be a variate taking
values \( y_{1}, y_{2}, \dots . y_{n} \) such that \( y_{i}= \)
\( \mathbf{6} \boldsymbol{x}_{\boldsymbol{i}}+\mathbf{3} ; \quad \boldsymbol{i}=\mathbf{1}, \boldsymbol{2}, \ldots \boldsymbol{n} . \) If \( \boldsymbol{V} \boldsymbol{a} \boldsymbol{r}(\boldsymbol{Y})=\boldsymbol{3 0} \)
then \( \sigma_{X} \) is equal to
A \( \cdot \frac{5}{\sqrt{6}} \)
в. \( \sqrt{\frac{5}{6}} \)
c. 30
D. \( \sqrt{30} \)
Subject: Chemistry
Which reagent is used for the following
conversion?
\( \boldsymbol{R}-\boldsymbol{C H}_{2}-\begin{array}{c}\boldsymbol{C l} \\ \dot{\boldsymbol{C}}-\boldsymbol{R} \longrightarrow \boldsymbol{R}-\boldsymbol{C} \equiv \boldsymbol{C}- \\ \boldsymbol{C l}\end{array}-\boldsymbol{C} \longrightarrow \)
\( \boldsymbol{R} \)
A. Na
в. ая. кон
c. alcoholic KOH followed by NaNHa
D. zn
Subject: Chemistry
The molarity of \( C l^{-}(100 \mathrm{ml}) \) ions in the
solution after 0.2 moles \( H C l \) are mixed
with 0.1 moles \( C a C l_{2} \) solution?
A. 0.8 m
B. 0.04 М
\( c .0 .4 \mathrm{M} \)
D. 0.08 м
Subject: Chemistry
Solute \( A \) is a ternary electrolyte and solute B is a non-electrolyte. If \( 0.1 \mathrm{M} \) solution of solute B produces an
osmotic pressure of \( 2 P, \) then 0.05
M solution of \( A \) at the same
temperature will produce an osmotic
pressure equal to:
A . \( 1.5 P \)
B. 2P
\( c \cdot 3 P \)
D.
Subject: Maths
Consider the statement, Given that
people who are in need of refuge and
consolation are apt to do odd things, it
is clear that people who are apt to do odd things are in need of refuge and consolation. This statement, of the form \( (P \Rightarrow Q) \Rightarrow(Q \Rightarrow P), \) is logically
equivalent to
A. People who are in need of refuge and consolation are not apt to do odd things.
B. People are apt to do odd things if and only if they are in need of refuge and consolation.
C. People who are apt to do odd things are in need of refuge and consolation.
D. People who are in need of refuge and consolation are apt to do odd things
Subject: Chemistry
An inorganic salt (A) is decomposed at about \( 523 \mathrm{K} \) to give products \( (\mathrm{B}) \) and
(C). compound (C) is a liquid at room temperature and is neutral to litmus paper while oxide (B) on burning with white phosphorous, given a dehydrating agent (D). compounds (A),
(B), (C) and (D) will be identified as:
A. \( N H_{4} N O_{3}, N_{2} O, H_{2} O, P_{2} O_{5} \)
в. \( N H_{4} N O_{2}, N_{2} O, H_{2} O, P_{2} O_{5} \)
c. \( C a C O_{3}, C a O, H_{2} O, C a C l_{2} \)
D. \( \operatorname{CaCO}_{3}, \) Са С \( , \) На\( _{2} \) О, СаОН\( _{2} \),
Subject: Chemistry
When a certain amount of ethylene was
combusted, \( 6226 \mathrm{kJ} \) heat was evolved. If
heat of combustion of ethyleneis \( 1411 \mathrm{kJ} \)
Determinethe volume of \( O_{2}(\text { at } \mathrm{NTP}) \)
that entered into the reaction
A . 996.3 L
B. 234 L
c. \( 296 L \)
D. 435 L
Subject: Maths
If \( A M \) between \( p^{t h} \) and \( q^{t h} \) terms of an \( A P \)
be equal to the AM between \( r^{t h} \) and \( s^{t h} \)
term of the \( A P, \) then \( p+q \) is equal to
A \( \cdot r+s \)
в. \( \frac{r-s}{r+s} \)
c. \( \frac{r+s}{r-s} \)
D. \( r+s+1 \)
Subject: Physics
The path of a ray of light passing
through a glass prism is shown below:
In this diagram the angle of prism, angle of incidence, angle of emergence and angle of deviation respectively have
been represented by:
A. \( 0, Y, Z \) and \( N \)
B. P, Y, M and Z,
c. \( 0, x, M \) and \( z \)
D. \( P, X, Z \) and \( N \)
Subject: Maths
A point on the parabola \( y^{2}=18 x \) at
which the ordinate increase at twice the
rate of the abscissa is \( \left(\frac{d x}{d t} \neq 0\right) \)
\( ^{\text {A }} \cdot\left(\frac{9}{8}, \frac{9}{2}\right) \)
в. (2,-4)
\( ^{\mathbf{C}} \cdot\left(-\frac{9}{8}, \frac{9}{2}\right) \)
D. (2,4)
Subject: Maths
If \( S=\frac{1}{1.5}+\frac{1}{5.9}+\frac{1}{9.13}+\ldots . ., \) then
\( ^{\mathbf{A}} \cdot T_{n}=\frac{1}{4}\left(\frac{1}{4 n-3}-\frac{1}{4 n+1}\right) \)
B. \( s_{n}=\frac{1}{4}\left[1-\frac{1}{4 n+1}\right] \)
c. \( S_{\infty}=1 \)
D. None
Subject: Chemistry
There is no S-S bond in:
\( A \cdot S_{2} O_{4}^{2-} \)
B. \( S_{2} O_{5}^{2-} \)
\( \mathrm{c} \cdot S_{2} \mathrm{O}_{3}^{-2} \)
D. \( S_{2} O_{7}^{-2} \)
Subject: Maths
In the figure, given below, CE is the
perpendicular to \( A B, \angle A C E= \)
\( 20^{\circ} \) and \( \angle A B D=50^{\circ} . \) Find the
measure of \( \angle B D A \)
A \( \cdot 36^{\circ} \)
B. \( 60^{\circ} \)
\( c \cdot 56^{\circ} \)
D. none of the above
Subject: Chemistry
Two flasks \( A \) and \( B \) is 500 m \( L \) each are
respectively filled with \( O_{2} \) and \( S O_{2} \) at
\( 300 K \) and 1 atm pressure. The flasks
contain :
A. The same number of atoms
B. The same number of molecules
c. More number of moles in flask \( A \) as compared to flask \( B \)
D. The same amount of gases
Subject: Maths
\( \int_{0}^{\pi} x f(\sin x) d x \) equals
\( ^{\mathbf{A}} \cdot_{2 \pi} \int_{0}^{\frac{\pi}{2}} f(\sin x) d x \)
в. \( \pi \int_{0}^{\pi} f(\sin x) d x \)
c. \( \quad \pi \int_{0}^{\frac{\pi}{2}} f(\sin x) d x \)
D. None of these
Subject: Maths
In the fig; we have \( X \) and \( Y \) are the mid-
points of \( A C \) and \( B C \) and \( A X=C Y \)
then
This question has multiple correct options
A. \( A C=B C \)
B. \( A B=B C \)
\( \mathbf{c} . A C=A B \)
\( \mathbf{D} \cdot C X=C Y \)
Subject: Chemistry
Which of the following statements are
incorrect?
A. \( N b \) is stable in +4 oxidation state
B. \( B k \) in +4 oxidation state is strongly oxidising but more stable than \( C m \) and \( A m \) in +4 oxidation state
C. Uranium can form oxygenated ion such as \( U O_{2}^{2+} \)
D. \( P u \) shows oxidation state up to +7
Subject: Chemistry
In the given disproportionation reaction in aqueus solution at room tempearature
\( \boldsymbol{H} \boldsymbol{N} \boldsymbol{O}_{2} \leftrightharpoons \boldsymbol{A}+\boldsymbol{B} \)
\( A \) and \( B \) cannot be:
This question has multiple correct options
A . nitric acid
B. nitrogen dioxide
c. nitrogen pentaoxide
D. nitrous oxide
Subject: Physics
Assertion
In a meter bridge experiment null point for an unknown resistance is put inside
an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance.
Reason
Resistance of metal increases with
increase in temperature.
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. Both Assertion and Reason are incorrect
Subject: Physics
A spherical ball of mass \( 1 k g \) moving
with a uniform speed of \( 1 \mathrm{m} / \mathrm{s} \) collides symmetrically with two identical spherical balls of mass \( 1 k g \) each at rest touching each other. If the two balls move with \( 0.5 m / s \) in two directions at
the same angle of \( 60^{\circ} \) with the direction of the first ball, the loss of kinetic
energy on account of the collision is:
в. \( 0.5 \mathrm{J} \)
c. \( 1.0 \mathrm{J} \)
D. \( 0.75 J \)
Subject: Maths
A square matrix \( \left(a_{i j}\right) \) in which \( a_{i j}=0 \)
for \( i \neq j \) and \( a_{i j}=k(\text { constant }) \) for \( i= \)
\( j \) is a
A. Unit matrix
B. Scalar matrix
c. Null matrix
D. none
Subject: Maths
A point at a distance of \( \sqrt{6} \) from the origin which lies on the straight line \( \frac{x-1}{1}=\frac{y-2}{2}=\frac{z+1}{3} \) will be
\( \mathbf{A} \cdot(1,-1,2) \)
В. (1,2,-1)
C \( \cdot\left(\frac{5}{7}, \frac{10}{7}, \frac{-13}{7}\right) \)
D. \( \left(\frac{5}{7}, \frac{2}{7}, \frac{-6}{7}\right) \)
Subject: Maths
Find the values of \( x, y \) and \( z \) from the
matrix equation. \( \left(\begin{array}{cc}5 x+2 & y-4 \\ 0 & 4 z+6\end{array}\right)=\left(\begin{array}{cc}12 & -8 \\ 0 & 2\end{array}\right) \)
Subject: Physics
A solid cylinder is rolling down on an inclined plane of angle \( \theta . \) The coefficient of static friction between the plane and
the cylinder is \( \mu_{s} \). The condition for the
cylinder not to slip is
A \( \cdot \tan \theta \geq 3 \mu_{s} \)
B \( \cdot \tan \theta>3 \mu_{s} \)
c. \( \tan \theta \leq 3 \mu_{s} \)
\( \mathbf{D} \cdot \tan \theta<3 \mu_{s} \)
Subject: Chemistry
Which of the following will increase the voltage of the cell?
\( \boldsymbol{S} \boldsymbol{n}(\boldsymbol{s})+\boldsymbol{2} \mathbf{A} \mathbf{g}^{+}(\boldsymbol{a} \boldsymbol{q}) \rightarrow \boldsymbol{2} \boldsymbol{A} \boldsymbol{g}(\boldsymbol{s})+\boldsymbol{S} \boldsymbol{n}^{2+} \)
A. Increase in the concentration of \( \operatorname{Sn}^{2+} \) ions
B. Increase in the concentration of \( A g^{+} \) ions
c. Increase in the size of silver rod
D. Removal of salt bridge
Subject: Maths
The area between the curves \( y=x^{2} \) and
\( \boldsymbol{y}=\frac{2}{1+x^{2}} \) is
A \( \cdot \pi-\frac{1}{3} \)
B . \( \pi-2 \)
c. \( \pi-\frac{2}{3} \)
D. \( \pi+\frac{2}{3} \)
Subject: Physics
When a current of \( 0.5 A \) is passed
through two resistors in series, the potential difference between the ends
of the series arrangement is \( 12.5 \% . \) On connecting them in parallel and passing a current of \( 1.5 A \), the potential difference across them is \( 6 V \). The two
resistances, in ohms, are
\( A \cdot 5,20 \)
B. 5, 15
c. 5,10
D. 15,20
Subject: Chemistry
(a) Draw the structures of the following molecules:
(i) \( N_{2} O_{5} \)
(ii) \( \boldsymbol{H} \boldsymbol{C l O}_{4} \)
(b) Explain the following observations:
(i) \( H_{2} S \) is more acidic than \( H_{2} O \)
(ii) Fluorine does not exhibit any
positive oxidation state.
(iii) Helium forms no real chemical
compound.
Subject: Physics
\( 150 \mathrm{J} \) of heat has been added to the gas
When 1 kg of ice at \( 0^{\circ} \mathrm{C} \) melts to water
at \( 0^{\circ} \mathrm{C} \) the resulting change in its
entropy latent heat of ice to be \( 80 \mathrm{cal} /^{\circ} \mathrm{C} \)
is
A. \( 273 \mathrm{cal} / \mathrm{K} \)
B. \( 8 \times 104 \mathrm{cal} / \mathrm{K} \)
c. 80 салК
D. \( 293 \mathrm{cal} / \mathrm{K} \)
Subject: Chemistry
Assertion
12 parts by mass of carbon in \( C O \) and
\( C O_{2} \) molecules combine with 16 and 32
parts by mass of oxygen.
Reason
A given compound always contains exactly the same proportion of elements by weight.
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. Both Assertion and Reason are incorrect
Subject: Physics
A Ge specimen is doped with Al. The
concentration of acceptor atoms is \( \sim \) \( 10^{21} \) atoms \( / m^{3} . \) Given that the intrinsic
concentration of electron-hole pairs is
\( 10^{19} / m^{3} . \) The concentration of electrons in the specimen is:
\( \mathbf{A} \cdot 10^{17} / m^{3} \)
B . \( 10^{15} / m^{3} \)
c. \( 10^{4} / m^{3} \)
D. \( 10^{2} / m^{3} \)
Subject: Physics
The diagram shows the principal
regions of the electromagnetic
spectrum, with some details labelled.
The diagram is not to scale. What is a typical order of magnitude of the wavelength of the radiation in
region Q?
\( A \cdot 10^{-7} m \)
B. \( 10^{-5} \) m
\( c \cdot 10^{-2} m \)
\( D \cdot 10^{0} m \)
Subject: Chemistry
top
Q Type your question
codes given below:
Column\( \mathbf{1} \)
Bond order
(a) \( N_{2} \rightarrow \quad \) increases and
\( N_{2}^{+} \)
(p) magnetic property is changed
Bond order
\( (b) \)
\( O_{2}^{+} \rightarrow \quad \) decreases and
(q) magnetic property \( O_{2}^{2+} \quad \) is not changed
Bond order
(c)
\( B_{2} \rightarrow \) \( B_{2}^{+} \)\( \quad \) (r) \( \quad \) increases and magnetic property is not changed
Bond order
(d)
\( \begin{array}{l}\begin{array}{l}N O^{-} \rightarrow \\ N O\end{array} \rightarrow & \text { (s) } \quad \begin{array}{l}\text { decreases and } \\ \text { magnetic property } \\ \text { is changed }\end{array}\end{array} \) 1 Note: Here change in magnetic property refers to change from diamagnetic to
paramagnetic or paramagnetic to diamagnetic.
\( A \cdot A-s, B-p, C-r, D-q \)
B. \( A-s, B-p, C-q, D-r \)
\( C \cdot A-r, B-q, C-s, D-p \)
D. \( A-p, B-s, C-q, D-r \)
Subject: Maths
Assertion
The minimum value of the expression
\( \sin \alpha+\sin \beta+\sin \gamma \) where \( \alpha, \beta, \gamma \) are
real number such that \( \boldsymbol{\alpha}+\boldsymbol{\beta}+\boldsymbol{\gamma}=\boldsymbol{\pi} \)
is negative because-
Reason
\( \alpha, \beta, \gamma \) are angles of a triangle.
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
Determine the value of \( k \) so that the
following linear equations has no
solution:
\( (3 k+1) x+3 y-2=0 \) and \( \left(k^{2}+\right. \)
1) \( \boldsymbol{x}+(\boldsymbol{k}-\mathbf{2}) \boldsymbol{y}-\mathbf{5}=\mathbf{0} \)
A. \( k=-1 \)
B. \( k=3 \)
c. \( k=-7 \)
D. \( k=8 \)
Subject: Chemistry
Assertion
Li and \( M g \) shows diagonal relationship.
Reason
Li and \( M g \) are diagonal to each other in the Periodic table.
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 system has two charges \( \boldsymbol{q} \boldsymbol{A}=\mathbf{2 . 5} \times \)
\( \mathbf{1 0}^{-7} \boldsymbol{C} \) and \( \boldsymbol{q} \boldsymbol{B}=-\boldsymbol{2 . 5} \times \mathbf{1 0}^{-\mathbf{7}} \boldsymbol{C} \)
located at point \( \boldsymbol{A}(\mathbf{0}, \mathbf{0},-\mathbf{1 5}) \) cm and
\( B(0,0,15) c m \) respectively. What are the total charge and electric dipole
moment vector of the system?