AkshitPareek2004/jee-question-analyzer-data huggingface dataset:
Subject: Chemistry
Which of the following reactions will get
affected by increasing the pressure? Also, mention whether change will
cause the reaction to go into forward or backward direction.
(i) \( \boldsymbol{C O C l}_{2}(\boldsymbol{g}) \rightleftharpoons \boldsymbol{C O}(\boldsymbol{g})+\boldsymbol{C l}_{2}(\boldsymbol{g}) \)
(ii) \( \boldsymbol{C H}_{4}(\boldsymbol{g})+\mathbf{2 S}_{2}(\boldsymbol{g}) \rightleftharpoons \boldsymbol{C S}_{2}(\boldsymbol{g})+ \)
\( 2 H_{2} S(g) \)
(iii) \( \boldsymbol{C O}_{2}(\boldsymbol{g})+\boldsymbol{C}(\boldsymbol{s}) \rightleftharpoons \mathbf{2} \boldsymbol{C O}(\boldsymbol{g}) \)
\( (\text { iv }) 2 H_{2}(g)+C O(g) \rightleftharpoons C H_{3} O H(g) \)
\( (v) C a C O_{3}(s) \rightleftharpoons C a O(s)+C O_{2}(g) \)
\( (v i) 4 N H_{3}(g)+5 O_{2}(g) \rightleftharpoons 4 N O(g)+ \)
\( \boldsymbol{6} \boldsymbol{H}_{2} \boldsymbol{O}(\boldsymbol{g}) \)
Subject: Physics
In the figure shown, cylinder'A' has
pump piston, whereas \( \mathrm{B} \) and \( \mathrm{C} \) cylinders
have lift pistons. If the maximum weight that can be placed on the pump
piston is 50 kgwt what is the maximum
weight that can be lifted by the piston in the cylinder'B'. Find the total
mechanical advantage. (Take \( \boldsymbol{g}= \)
\( \left.10 m s^{-2}\right) \)
Subject: Physics
Assertion
NAND or NOR gates are called digital building blocks.
Reason
The repeated use of NAND (or NOR) gates can produce all the basis or complicated gates.
A. Assertion is true, Reason is true; Reason is a correct explanation for Assertion
B. Assertion is true, Reason is true; Reason is not a correct explanation for Assertion
C. Assertion is true, Reason is false
D. Assertion is false, Reason is true
Subject: Chemistry
Magnesium powder burns in air to give:
A. \( M g O \) only
в. \( M g O \) and \( M g\left(N O_{3}\right)_{2} \)
c. \( M g O \) and \( M g_{3} N_{2} \)
D. \( M g\left(N O_{3}\right)_{2} \) and \( M g_{3} N_{2} \)
Subject: Chemistry
\( \boldsymbol{P h C} \equiv \boldsymbol{C M e} \frac{\boldsymbol{H}_{3} \boldsymbol{O}^{+}, \boldsymbol{H} \boldsymbol{g}^{2+}}{\rightarrow} \)
Identify the product in the reaction.
\( \mathbf{A} \cdot P h C H_{2} C H_{2} C H O \)
в. \( \operatorname{Ph} \mathrm{hOCH}_{2} \mathrm{CH}_{3} \)
\( \mathbf{c} \cdot P h C H_{2} C O C H_{3} \)
D. Рh СОСОМ
Subject: Physics
A moving coil galvanometer A has 200
turns and resistance \( 100 . \) Another
meter \( \mathrm{B} \) has 100 turns and resistance
\( 40 . \) All the other quantities are same in both the cases. The current sensistivity of
A. B is double as that of A
B. A is 2.5 times of B
c. A is 5 times of B
D. B is 5 times of A
Subject: Chemistry
If \( K_{p} \) for a reaction is \( \frac{1}{9} \times 10^{-2} a t m^{-2} \) at
500K. Magnitude of \( K_{c} \) will be [Take \( R= \) 0.08]
A. \( 3 \times 10^{-1} \)
В . \( \frac{1}{9} \times 10^{-2} \)
\( c \cdot \frac{16}{9} \)
D. Data insufficient
Subject: Maths
\( \frac{\boldsymbol{d} \boldsymbol{y}}{\boldsymbol{d} \boldsymbol{x}}+\frac{\boldsymbol{y}}{\boldsymbol{x}}=\frac{\boldsymbol{y}^{2}}{\boldsymbol{x}^{2}} \)
Solve
\( \mathbf{A} \cdot y-2 x=k x^{2} y \)
B \( \cdot y+2 x=k x^{2} y \)
C \( \cdot 2 y-x=k x^{2} y \)
D. \( 2 y+x=k x^{2} y \)
Subject: Chemistry
Consider a gas with density \( \rho \) and \( C \) as
the root mean square velocity of its molecules contained in a volume. If the
system moves as a whole with velocity
then the pressure exerted by the gas
is :
\( \mathbf{A} \cdot \frac{1}{3} \rho C^{2} \)
B \( \cdot \frac{1}{3} \rho(C+v)^{2} \)
c. \( \frac{1}{3} \rho(C-v)^{2} \)
D \( \cdot \frac{1}{3} \rho\left(C^{2}-v^{2}\right) \)
Subject: Chemistry
Which of the following statement is
wrong regarding Lanthanoids?
A. The ionic size of \( L n(\| I) \) ions decreases with increasing atomic number
B. \( \ln ( \) III ) hydroxides are mainly basic in nature
C. \( \operatorname{Ln}(\text { III }) \) compounds are predominantly ionic in character
D. \( \operatorname{Ln}(\text { III }) \) compounds are generally colourless
Subject: Physics
If \( 6 \mathrm{mm} \) is the distance moved by the
thimble on the main scale for 6
rotations then pitch of the screw is :
\( \mathbf{A} \cdot 1 \mathrm{mm} \)
B. \( 1 \mathrm{cm} \)
\( c .0 .1 \mathrm{mm} \)
D. 0.01 cm
Subject: Chemistry
Which of the following statement(s) is/are correct?
i) Na reacts with liq. \( N H_{3} \) to form
paramagnetic species.
ii) \( O_{2} \) reacts with 2 -
ethylanthraquinol form to paramagnetic species.
iii) Hydrolysis of 1 mol of peroxodisulphric acid produces 1 mol of sulphuric acid and 2 mole of
peroxomono sulphuric acid
A.
B. i
c. i and i
D. i and iii
Subject: Maths
If the curve \( \boldsymbol{y}=c_{1} e^{m_{1} x}+c_{2} e^{m_{3} x}, \) where
\( c_{1}, c_{2}, c_{3} \) are arbitrary constants and
\( m_{1}, m_{2}, m_{3} \) are roots of \( m^{3}-7 m+ \)
\( \mathbf{6}=\mathbf{0}, \) then the differential equation corresponding to the given curve is,
A \( \cdot y_{2}-7 y_{1}+6 y=0 \)
в. \( y_{2}-7 y_{1}+6=0 \)
c. \( y_{2}+7 y_{1}+6 y=0 \)
D. \( y_{2}+7 y_{1}+6=0 \)
Subject: Chemistry
Observe the following statements.
1. Lanthanides actively participate in chemical reactions.
2. The basic nature of hydroxides of
lanthanides increases from \( L a(O H)_{3} \)
to \( L u(O H)_{3} \)
3. Lanthanides do not form coordinate
compounds as readily as d-block metals.
The correct statements are:
A. \( 1,2 \& 3 \)
В. 183
\( c \cdot 1 \& 2 \)
D. 2 \& 3
Subject: Maths
The volume of two spheres is in the ratio 64: 27 and the sum of their radiiis
7 cm. The difference in their total
surface areas is
\( \mathbf{A} \cdot 38 c m^{2} \)
B. \( 58 c m^{2} \)
\( \mathbf{c} \cdot 78 c m^{2} \)
D. \( 88 \mathrm{cm}^{2} \)
Subject: Physics
The electric potential \( V \) at any point
\( (x, y, z) \) in space is given by \( V=3 x^{2} \)
where \( x, y, z \) are all in metre. The
electric field at the point \( (1 m, 0,2 m) \) is
A \( \cdot 6 V m^{-1} \) along negative \( x \) -axis
B. \( 6 V m^{-1} \) along positive \( x \) -axis
C. \( 12 \mathrm{Vm}^{-1} \) along negative \( x \) -axis
D. \( 12 \mathrm{Vm}^{-1} \) along positive \( x \) -axis
E. \( 8 \mathrm{Vm}^{-1} \) along negative \( x \) -axis
Subject: Maths
The probability that a number selected at random from the numbers
\( \mathbf{1}, \mathbf{2}, \mathbf{3} \dots \dots \mathbf{1 5} \) is a multiple of \( \mathbf{4} \) is
A \( \cdot \frac{4}{15} \)
в. \( \frac{2}{15} \)
c. \( \frac{1}{15} \)
D.
Subject: Physics
The velocity of a particle moving in straight line depends on its position \( x \)
w.r.t. to fixed origin according to the relation \( 16 x^{2}+4 v^{2}=9 . \) The
acceleration of particle when it is at
\( x=2 m \) is:
A \( .-2 m / s^{2} \)
B. \( -8 m / s^{2} \)
c. \( -6 m / s^{2} \)
D. Not defined
Subject: Chemistry
The \( p H \) values of certain substances
are given below.
\( \begin{array}{ll}\text { Substance } & \text { pH value } \\ \text { (1) Human blood } & 7.4 \\ \text { (2) Baking soda } & 8.2 \\ \text { (3) Vinegar } & 2.5 \\ \text { (4) Household Ammonia } & 12.0\end{array} \)
(a) Which of the substances are acidic
in nature?
(b) Which of the substances are basic
in nature?
Subject: Biology
Refer to the given figure showing a typical plant with its parts labelled as U, \( V, W \) and \( X \) and read the following paragraph. P is a plant where part U is edible, plant \( Q \) has edible part \( W \), plant R has edible part \( X \) whereas plant \( S \) has
edible part \( V \)
Select the option that correctly identifies these plants.
A. P-Clove, Q-Mustard, R-Cumin, S-Ginger
c. P-Pomegranate, Q-Spinach, R-Clove, S-Radish
D. P-cumin, Q-Rose, R-spinach, S-Potato
Subject: Chemistry
The ratio of lowering of vapour pressure of \( 0.1 ~ M \) aqueous solutions of \( K C l \)
\( \boldsymbol{C u} \boldsymbol{S O}_{4} \& \boldsymbol{N a}_{2} \boldsymbol{S O}_{4} \) is:
A. 1: 2: 3
B. 2: 2: 3
\( \mathrm{c} \cdot 1: 1: 1 \)
D. 3: 2: 1
Subject: Maths
Let 'n' Arithmetic Means and 'n'
Harmonic Means are inserted between
two positive number'a' and 'b'. If sum of all Arithmetic Means is equal to sum of
reciprocal all Harmonic means, then product of number is
\( A \)
B. 2
\( c \cdot \frac{1}{2} \)
D. 3
Subject: Chemistry
Out of \( \mathrm{HPO}_{3} \) and \( \mathrm{H}_{3} \mathrm{PO}_{2} \) the more
powerful oxidant is :
\( A \cdot \mathrm{HPO}_{3} \)
в. \( \mathrm{H}_{3} \mathrm{PO}_{2} \)
c. equal
D. None
Subject: Maths
I.F of \( \frac{\boldsymbol{d} \boldsymbol{y}}{\boldsymbol{d} \boldsymbol{x}}+\boldsymbol{x} \sin 2 \boldsymbol{y}=\boldsymbol{x}^{3} \cos ^{2} \boldsymbol{y} \) is:
A. \( \tan y \)
B. \( e^{\tan y} \)
\( \mathbf{c} \cdot e^{\sin } \)
D. \( e^{x} \)
Subject: Physics
The direction of \( \boldsymbol{\tau} \) is :
\( \mathbf{A} \cdot \) parallel to the plane of \( \bar{r} \) and \( \bar{F} \)
B. perpendicular to the plane of \( \bar{r} \) and \( \bar{F} \).
C. parallel to the plane of \( \bar{r} \) and \( \bar{P} \).
D. perpendicular to the plane of \( \bar{r} \) and \( \bar{P} \).
Subject: Physics
A capacitor has a resistance of
\( 1200 M \Omega \) and capacitance of \( 22 \mu F \)
When connected to an AC supply of frequency \( 80 \mathrm{Hz} \), the alternating voltage supply required to drive a current of 10
virtual amperes is
A. \( 904 \sqrt{2} V \)
B. 904
D. \( 452 \mathrm{v} \)
Subject: Chemistry
In a vessel containing \( S O_{3}, S O_{2} \) and \( O_{2} \)
at equilibrium, some helium gas is introduced so that total pressure
increases while temperature and volume remain the same. According to Le Chatelier's principle the dissociation
of \( \boldsymbol{S O}_{3} \)
A. increases
B. decreases
c. remains unaltered
D. changes unpredictably
Subject: Maths
The period of oscillation \( \boldsymbol{T} \) of a
pendulum of length \( l \) at a place of acceleration due to gravity \( g \) is given by \( \boldsymbol{T}=2 \pi \sqrt{\frac{l}{g}} . \) If the calculated length is 0.992 times the actual length and if the value assumed for \( g \) is 1.002 times its actual value, the relative error in the computed value of \( \boldsymbol{T} \) is
A. 0.005
в. -0.005
c. 0.003
D. -0.003
Subject: Chemistry
Match the following:
Set- Set - II
A) Tear gas
1)
\( \left[\boldsymbol{C}_{2} \boldsymbol{H}_{4} \boldsymbol{C l}\right]_{2} \boldsymbol{S} \)
B) Musturd gas
2) \( C O C l_{2} \)
C) Phosgene
3) \( C C l_{3} N O_{2} \)
D) Teflon
4) \( \left(C_{2} F_{4}\right)_{n} \)
A. \( A-3, B-1, C-2, D-4 \)
в. \( A-1, B-2, C-4, D-3 \)
c. \( A-2, B-3, C-4, D-1 \)
D. \( A-4 . B-2, C-1, D-3 \)
Subject: Chemistry
Identify the equation used to determine the amount of heat required to melt
10 grams of ice:
A \( \cdot Q=m C_{s p} \Delta T \)
в. \( Q=n \triangle H \)
c. \( K E=\frac{1}{2} m v^{2} \)
D. \( P E=m g h \)
E . \( P V=n R T \)
Subject: Chemistry
Which of the following is a redox
reaction:
\( \mathbf{A} \cdot 2 C r_{4}^{2-}+2 H^{+} \rightarrow C r_{2} O_{7}^{2-}+H_{2} O \)
B \( \cdot C u S O_{4}+4 N H_{3} \rightarrow\left[C u\left(N H_{3}\right)_{4}\right] S O_{4} \)
\( \mathbf{c} \cdot 2 N a_{2} S_{2} O_{3}+I_{2} \rightarrow N a_{2} S_{4} O_{6}+2 N a I \)
\( \mathbf{D} \cdot C r_{2} O_{7}^{2-}+2 O H^{-} \rightarrow 2 C r O_{4}^{2-}+H_{2} O \)
Subject: Physics
When a sphere of radius \( r_{1}=1.2 \mathrm{mm} \)
moves in glycerin, the laminar flow is observed if the velocity of the sphere
does not exceed \( v_{1}=23 \mathrm{cm} / \mathrm{s} . \) At what
minimum velocity \( v_{2}(\text { in } \mu \mathrm{m} / \mathrm{s}) \) of \( \mathrm{a} \)
sphere of radius \( r_{2}=5.5 \mathrm{cm} \) will the
flow in water become turbulent? The
viscosities of glycerin and water are
equal to \( \eta_{1}=13.9 P \) and \( \eta_{2}=0.011 P \)
respectively.
Subject: Maths
If \( \boldsymbol{A}\left(\mathbf{1}, \boldsymbol{p}^{2}\right) ; \boldsymbol{B}(\mathbf{0}, \mathbf{1}) \) and \( \boldsymbol{C}(\boldsymbol{p}, \boldsymbol{0}) \) are the
co ordinates of three points then the value of \( p \) for which the area of triangle
ABC is minimum, is
A \( \cdot \frac{1}{\sqrt{3}} \)
B. \( -\frac{1}{\sqrt{3}} \)
c. \( \frac{1}{\sqrt{3}} \) or \( -\frac{1}{\sqrt{3}} \)
D. None
Subject: Chemistry
Which of the following represents a conjugate acid/base pair?
A. \( N a^{+} / C l^{-} \)
в. \( H C l / H^{+} \)
c. \( H_{2} C O_{3} / C O_{3}^{2} \)
D. \( N H_{3} / N H_{4}^{+} \)
E . \( K^{+} / O H^{-} \)
Subject: Maths
Given \( f(x) \) is a linear function and \( \boldsymbol{f}(\mathbf{2})=\mathbf{3} \) and \( \boldsymbol{f}(-\mathbf{6})=-\mathbf{1 3} . \) Find \( \boldsymbol{y} \)
intercept of \( \boldsymbol{f}(\boldsymbol{x}) \)
A . -1
B.
c. 1
D.
Subject: Maths
The solution set of \( f^{\prime}(x)>g^{\prime}(x) \) where
\( f(x)=\left(\frac{1}{2}\right) 5^{2 x+1} \) and \( g(x)=5^{x}+ \)
\( 4 x \log 5 \) is
\( A \cdot(1, \infty) \)
B \( \cdot(0,1) \)
\( c \cdot[2, \infty) \)
D. \( (0, \infty) \)
Subject: Chemistry
Assertion
For a first order reaction, \( t_{1 / 2} \) is independent of the initial concentration
of reactants.
Reason
For a first order reaction, \( t_{1 / 2} \) is thrice
the \( t_{7 / 8} \)
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 weight lifter jerks \( 220 k g \) vertically
through 1.5meters and holds still at
that height for two minutes. The work done by him in lifting and in holding it still are respectively (Take \( \boldsymbol{g}=\mathbf{9 . 8} \boldsymbol{m} / \boldsymbol{s} \)
):
A. \( 220 J, 330 J \)
в. \( 3234 J, 0 \)
c. \( 2334 J, 10 J \)
D. \( 0,3234 J \)
Subject: Biology
Read the following statements and select the correct option.
Statement 1: Ozone layer present in the stratosphere protects the living organisms from harmful UV rays coming from the sun by absorbing nearly all of them.

Statement 2: Ozone formed in the
troposphere by photochemical
reactions as a result of human
activities which is harmful to all living organisms.
A. Both statements 1 and 2 are correct
B. Statement 1 is correct but statement 2 is incorrect
c. statement 1 is incorrect but statement 2 is correct
D. Both statements1 and 2 are incorrect
Subject: Maths
If \( \boldsymbol{x}^{2}+\boldsymbol{y}^{2}=\boldsymbol{t}+\frac{\mathbf{1}}{\boldsymbol{t}} \) and \( \boldsymbol{x}^{4}+\boldsymbol{y}^{4}=\boldsymbol{t}^{2}+ \)
\( \frac{1}{t^{2}} \) then \( \frac{d y}{d x}= \)
A \( \cdot-\frac{x}{y} \)
в. \( \frac{-y}{x} \)
c. \( \frac{x^{2}}{y^{2}} \)
D. \( \frac{y^{2}}{x^{2}} \)
Subject: Maths
The first and second order derivatives of
a function \( f(x) \) exist at all points in \( (a, b) \) with
\( \mathbf{f}^{\prime}(\mathbf{c})=\mathbf{0}, \) where \( \mathbf{a}<\mathbf{c}<\mathbf{b} . \) Further
more, if \( \mathrm{f}^{\prime}(\mathrm{x})<0 \) at all points on the
immediate left of \( \mathbf{c} \) and \( \mathbf{f}^{\prime}(\mathbf{x})>\mathbf{0} \) for all
points on the immediate right of \( c \), then at \( \mathbf{x}=\mathbf{c}, \mathbf{f}(\mathbf{x}) \) has a
A. local maximum
B. local minimum
c. point of inflexion
D. none of these
Subject: Maths
If \( \boldsymbol{A}=\{\mathbf{2}, \mathbf{3}\} \) and \( \boldsymbol{B}=\{1,2, \mathbf{3}, 4\}, \) then
which of the following is not a subset of \( \boldsymbol{A} \times \boldsymbol{B} \)
A \( \cdot\{(2,3),(2,4),(3,3),(3,4)\} \)
B - \{(2,2),(3,1),(3,4),(2,3)\}
c. \{(2,1),(3,2)\}
D \cdot \{(1,2),(2,3)\}
Subject: Chemistry
The number of \( \boldsymbol{H}^{+} \) ions in \( 1 \mathrm{cc} \) of \( \mathrm{a} \)
solution of \( p H=13 \) is:
A. \( 6.023 \times 10^{7} \)
B. \( 1 \times 10^{-13} \)
c. \( 6.023 \times 10^{13} \)
D. \( 1 \times 10^{16} \)
Subject: Maths
Simplify: \( (2 x+1)(1-x)\left(x^{2}+x\right) \)
A \( \cdot 2 x^{4}-x^{3}+2 x^{2}+x \)
В. \( -2 x^{4}-x^{3}+2 x^{2}+x \)
c. \( -2 x^{4}+x^{3}+2 x^{2}+x \)
D. \( -2 x^{4}-x^{3}+2 x^{2}-x \)
Subject: Maths
\( \boldsymbol{f}(\boldsymbol{\theta})=\sin \theta(\sin \theta+\sin 3 \boldsymbol{\theta}) \operatorname{then} \boldsymbol{f}(\boldsymbol{\theta}) ? \)
\( A \cdot \geq 0 \) only when \( \theta \geq 0 \)
B. \( \leq 0 \) for all real \( \theta \)
\( \mathbf{c} . \geq 0 \) for all real \( \theta \)
D. \( \leq 0 \) only when \( \theta \leq 0 \)
Subject: Physics
In a circuit, \( L, C \) and \( R \) are connected in series with an alternating voltage source of frequency \( f \). The current leads
the voltage by \( 45^{\circ} . \) The value of \( C \) is :
A \( \frac{1}{\pi f(2 \pi f L+R)} \)
в. \( \frac{1}{\pi f(2 \pi f L-R)} \)
c. \( \frac{1}{2 \pi f(2 \pi f L+R)} \)
D. \( \frac{1}{2 \pi f(2 \pi f L-R)} \)
Subject: Chemistry
Statement 1: Water is a good solvent for
ionic and/or polar covalent substance. Statement 2: Water shows hydrogen
bonding between oxygen atoms.
A. Both Statement 1 and Statement 2 are correct and
Statement 2 is the correct explanation of Statement 1
B. Both Statement 1 and Statement 2 are correct and
Statement 2 is not the correct explanation of Statement 1.
C. Statement 1 is correct but Statement 2 is not correct.
D. Statement 1 is not correct but Statement 2 is correct.
E. Both the Statement 1 and Statement 2 are not correct.
Subject: Chemistry
Give the formulae of the following complexes:
(i) ammineaquadibromidocopper (II)
(ii) potassium tetracyanocuperate (II)
(iii) diamminedichloridoplatinum (II)
(iv)potassiumpentacyanonitrosylferrat
\( e(11) \)
(v) amminechloridobis (ethane-1,2-
diamine)cobalt (III) ion
(vi) tetraamminedichloridocobalt (III)
ion
Subject: Physics
What is the refractive index of a prism
whose angle \( A=60^{\circ} \) and angle of
minimum deviation \( \boldsymbol{d}_{\boldsymbol{m}}=\boldsymbol{3} \boldsymbol{0}^{\boldsymbol{o}} \) ?
A \( \cdot \sqrt{2} \)
в. \( \frac{1}{\sqrt{2}} \)
c. 1
D. \( \frac{1}{\sqrt{3}} \)
Subject: Physics
Which of the following is a correct
statement regarding the pressure due
to fluids?
A. Force acting on the wall due to pressure is always perpendicular to it because of collision between the molecules takes place perpendicular to it.
B. Force acting on the wall due to pressure is always perpendicular to it because of collision between the molecules takes place oblique to it.
C. Force acting on the wall due to pressure is always oblique to it because of collision between the molecules takes place perpendicular to it.
D. Force acting on the wall due to pressure is always perpendicular to it because of collision between the molecules takes place at any direction to it but its normal reaction on the wall is always perpendicular to it.
Subject: Chemistry
The \( \left[\boldsymbol{O H}^{-}\right] \) of \( \mathbf{0 . 0 0 5} \boldsymbol{M} \boldsymbol{H}_{2} \boldsymbol{S O}_{4} \) is:
A \( \cdot 2 \times 10^{-2} M \)
В. \( 5 \times 10^{-3} M \)
\( \mathrm{c} \cdot 10^{-2} M \)
D. \( 10^{-12} M \)
Subject: Chemistry
Which of the following is correct for a spontaneous reaction at any temperature?
A. \( \Delta H=-v e, \Delta S=+v e, \Delta G=-v e \)
B. \( \Delta H=-v e, \Delta S=-v e, \Delta G=-v e \)
c. \( \Delta H=+v e, \Delta S=+v e, \Delta G=-v e \)
D. \( \Delta H=-v e, \Delta S=+v e, \Delta G=+v e \)
Subject: Physics
A transformer has 200 turns in primary and 400 turns in secondary. When a battery of \( 6 \mathrm{V} \) and negligible internal resistance is connected to the primary a current of \( 2 \mathrm{A} \) is produced in it. The secondary voltage and current are
\( A \cdot 12 v, 1 A \)
B. 12 V, zero
c. zero, 1A
D. zero, zero
Subject: Maths
If \( \frac{a}{b}-\frac{c}{d}=0 \) and \( b c=7, \) then determine
the true statement among the following.
A. a and b are directly proportional.
B. a and c are inversely proportional.
c. a and d are inversely proportional.
D. b and c are directly proportional.
E. c and d are inversely proportional.
Subject: Physics
a) Using the phenomenon of polarization, show how transverse nature of light can be demonstrated.
b) Two polaroids \( P_{1} \) and \( P_{2} \) are placed
with their pass axes perpendicular to
each other. Unpolarised light of
intensity \( I_{0} \) is incident on \( P_{1} . \) A third
Polaroid \( P_{3} \) is kept in between \( P_{1} \) and \( P_{2} \)
such that its pass axis makes an angle
of \( 30^{\circ} \) with that of \( P_{1} \). Determine the intensity of light transmitted through
\( P_{1}, P_{2} \) and \( P_{3} \)
Subject: Biology
Assertion
Tapeworm, roundworm and pinworm are
endoparasites of human intestine.
Reason
Improperly cooked food is the source of
intestinal infections.
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: Chemistry
For the process, \( \boldsymbol{N} \boldsymbol{H}_{3}(\boldsymbol{g})+ \)
\( \boldsymbol{H} \boldsymbol{C l}(\boldsymbol{g}) \longrightarrow \boldsymbol{N} \boldsymbol{H}_{4} \boldsymbol{C l}(\boldsymbol{s}) \)
A. \( \Delta H=+v e, \Delta S=+v e \)
B. \( \Delta H=-v e, \Delta S=+v e \)
c. \( \Delta H=+v e, \Delta S=-v e \)
D. \( \Delta H=-v e, \Delta S=-v e \)
Subject: Physics
When a man stands on a moving escalator he goes up in \( 40 s \) and when
he walked up the moving escalator he goes up in 20 s. The man walk up the
stationary escalator in a time of:
\( \mathbf{A} \cdot 60 \)
B. \( 40 s \)
\( c \cdot 20 s \)
D. \( 50 s \)
Subject: Chemistry
toppr
Q Type your question
heat changes in physical and chemical processes are measured with an instrument called Calorimeter. Heat
change in the process is calculated as \( \boldsymbol{q}=\boldsymbol{m} \boldsymbol{s} \boldsymbol{\Delta} \boldsymbol{T} \ldots \ldots \ldots \boldsymbol{s}=\boldsymbol{s} \boldsymbol{p} e c i f i \boldsymbol{c} \quad \boldsymbol{h} e \boldsymbol{a} \boldsymbol{t} \)
\( =c \Delta T_{\ldots \ldots . .} c=h e a t \quad \) capacity
Heat of reaction at constant volume is
measured using bomb Calorimeter.
\( \boldsymbol{q}_{V}=\boldsymbol{\Delta} \boldsymbol{U}= \)
internal energy change
Heat of reaction at constant pressure is measured using bomb Calorimeter.
\( \boldsymbol{q}_{\boldsymbol{P}}=\boldsymbol{\Delta} \boldsymbol{H} \)
\( \boldsymbol{q}_{\boldsymbol{P}}=\boldsymbol{q}_{\boldsymbol{V}}+\boldsymbol{P} \boldsymbol{\Delta} \boldsymbol{V} \)
\( \boldsymbol{\Delta} \boldsymbol{H}=\boldsymbol{\Delta} \boldsymbol{U}+\boldsymbol{\Delta} \boldsymbol{n} \boldsymbol{R} \)
The enthalpy of fusion of ice is
\( 6.02 k J m o l^{-1} . \) The heat capacity of
water is \( 4.18 J g^{-1} C^{-1} \)
What is the smallest number of ice
cubes at \( 0^{\circ} \mathrm{C} \), each containing one mole
of water, that is needed to cool \( 500 g \) of
liquid water from \( 20^{\circ} C \) to \( 0^{\circ} C \)
\( A \cdot 8 \)
B. 7
c. 140
D. 120
Subject: Maths
A function \( R \) on the set \( N \) of natural
numbers is defined as \( R=\{(2 n, 2 n+ \)
\( \mathbf{1}): \boldsymbol{n} \in \boldsymbol{N}\} \)
The domain of \( R=\{2,4,6,8, \ldots, \ldots, \ldots\} \)
A. True
B. False
Subject: Biology
A fish-eating bird species was found to
have a specific, heavy metal
concentration of 700,000 ppt (parts per
trillion). The conclusion based on the
data is
A. Air pollution may have caused this bird species to inhale dangerous amounts of heavy metals while migrating.
B. The entire population of the bird species, from which this sample was taken, died
C. The population of this bird species exploded, causing an ecosystem imbalance.
D. Pollutants tend to collect in areas of land where this
bird species nests.
E. This bird species is at a high trophic level on the food chain.
Subject: Physics
In an n-p-n transistor circuit, the
collector current is \( 9 \mathrm{mA} \). If \( 90 \% \) of the
electrons emitted reach the collector.
Then the emitter current is
\( A \cdot 8.1 \mathrm{mA} \)
B. 8 mA
\( c \cdot 9 m A \)
D. \( 10 \mathrm{mA} \)
Subject: Physics
If \( 10,000 V \) are applied across an \( X \) -ray tube, find the ratio of wavelength of the incident electrons and the shortest
wavelength of \( X \) -ray coming out of the X-ray tube, given \( e / m \) of electron \( = \) \( 1.8 \times 10^{11} C k g^{-1} \)
\( \mathbf{A} \cdot 1: 10 \)
B. 10: 1
c. 5: 1
D. 1: 5