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Write the simplest form of \( \tan ^{-1}[\sqrt{\frac{1-\cos x}{1+\cos x}}] \)
| 2 |
Maths
|
It is evident that, it is the genetic make up of the sperm that determine the sex of the child in human beings.
Substantiate.
| 0 |
Biology
|
The Sl unit of linear momentum is
\( \boldsymbol{k} \boldsymbol{g} \boldsymbol{m} / \boldsymbol{s}^{-1} \)
A. True
B. False
| 3 |
Physics
|
Solve: \( \frac{d y}{d x}+2 y=\sin x \)
| 2 |
Maths
|
The intensity of light beyond a particular limit is unable to increase the rate of photosynthesis. The phenomena is known as
A. Light compensation point.
B. Light saturation intensity
c. Solarization
D. None of the above
| 0 |
Biology
|
A dilute ferrous sulphate solution was
gradually added to the beaker
containing acidified potassium
permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
A \( \cdot K M n O_{4} \) is an oxidising agent, and it oxidies \( F e S O_{4} \)
B. \( F e S O_{4} \) acts as an oxidising agent and oxidises
\( K M n O_{4} \)
C. The colour disappear due to dilution; no reaction is involved
D. \( K M n O_{4} \) is an unstable compound and decomposes is presence of \( F e S O_{4} \) to a colourless compound
| 1 |
Chemistry
|
A \( 4 \mathrm{cm} \) tall object is placed perpendicular to the principal axis of a convex lens of focal length \( 24 \mathrm{cm} . \) The distance of the object from the lens is 16 cm. Find the position, size and nature of the image formed, using the lens formula.
| 3 |
Physics
|
valuate: \( \left|\begin{array}{cccc}1 & a & a^{2} & a^{3}+b c d \\ 1 & b & b^{2} & b^{3}+c d a \\ 1 & c & c^{2} & c^{3}+a b d \\ 1 & d & d^{2} & d^{3}+a b c\end{array}\right| \)
| 2 |
Maths
|
For a reversible reaction, \( \boldsymbol{A}+\boldsymbol{B} \rightleftharpoons \boldsymbol{C}+ \)
\( D, \) the graph for rate of reaction with
time is given below. Mark the terms \( (p),(q) \) and \( (r) \)
A \( \cdot(p)- \) rate of backward reaction
(q) - rate of forward reaction
(r) - equilibrium
B. (p) - rate of forward reaction,
(q) - rate of backward reaction, (r) - equilibrium
c. (p) - concentration of products
(q) - concentration of reactants, (r) - rate of reaction
D. (p) - instantaneous rate of reaction,
(q) - variation of rate, (r) - average rate of reaction
| 1 |
Chemistry
|
Assertion
Every biological system resist a change and wants to remain in state of
equilibrium.
Reason
Climax communities of an ecosystem are produced after several changes it has gone through succession.
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
| 0 |
Biology
|
Diodes \( D-1 \) and \( D_{2} \) shown in circuit
are silicon diodes.The voltage drop (V)
across the diode \( D_{2} \) and the power
dissipated (P) by this diode \( \left(D_{2}\right) \) are
\( \mathbf{A} \cdot V_{D_{2}}=0.7 V \) and \( P_{D_{2}}=0 W \)
B. \( V_{D_{2}}=5 V \) and \( P_{D_{2}}=0 W \)
\( \mathbf{C} \cdot V_{D_{2}}=0.7 V \) and \( P_{D_{2}}=0.7 W \)
D. \( V_{D_{2}}=5.0 V \) and \( P_{D_{2}}=5 W \)
| 3 |
Physics
|
(a) What is shunt?
(b) State Ampere's circuital law. Using the law, obtain an expression for the
magnetic field well aside the solenoid of finite length.
| 3 |
Physics
|
In which of the following is true bacteria?
A. Archea Bacteria
B. Cyano Bacteria
c. Eu bacteria
D. Both B and C
| 0 |
Biology
|
\( \left(\boldsymbol{C} \boldsymbol{H}_{3}\right)_{2} \boldsymbol{C B r} \boldsymbol{C H}_{2} \boldsymbol{C H}_{3} \)
Give IUPAC name of the compound.
| 1 |
Chemistry
|
Mass \( \% \) of carbon in ethanol is:
A . 52
B. 13
c. 34
D. 90
E . 80
| 1 |
Chemistry
|
The correct arrangement for taking
temperature in the study of the
temperature-time graph is shown in
figure
A . \( A \)
B. \( B \)
\( c . c \)
D. \( D \)
| 3 |
Physics
|
Which of the following will produce a buffer solution when mixed in equal
volumes?
A. 0.1 mol \( d m^{-3} N H_{4} O H \) and 0.1 mol \( d m^{-3} H C l \)
B. 0.05 mol \( d m^{-3} N H_{4} O H \) and 0.1 mol \( d m^{-3} \) HCl
c. 0.1 mol \( d m^{-3} N H_{4} O H \) and 0.05 mol \( d m^{-3} H C l \)
D. 0.1 mol \( d m^{-3} C H_{3} C O O N a \) and 0.1 mol \( d m^{-3} \) NaOH
| 1 |
Chemistry
|
Give two examples of the fundamenta physical quantities along with their S.
units.
| 3 |
Physics
|
Two thin lenses of focal lengths \( 20 \mathrm{cm} \)
and \( 25 c m \) are placed in contact. The effective power of the combination is
A \( \cdot \frac{1}{9} D \)
B. \( 45 D \)
\( c . \$ \$ 6 D \$ \)
D. \( 9 D \)
| 3 |
Physics
|
The experiment value for the molar mass of a non-volatile solute is twice
the theoretic value. What is Vant Hoff
factor for the solute?
| 1 |
Chemistry
|
A wire elongates by I mm when a load \( \mathbf{W} \) is hanged from it. If the wire goes over a pulley and two weights Weach are hung at the two ends,the elongation of the wire will be (in mm)
A. zero
B. I / 2
\( c \)
D. 2
| 3 |
Physics
|
Find the middle term of \( \left(\frac{a}{x}+\frac{x}{a}\right)^{10} \)
| 2 |
Maths
|
The mass of hydrogen at STP, that is present in a vessel which can hold 4
grams of oxygen under similar conditions, is:
\( A \cdot 1 g m \)
B. \( 0.5 \mathrm{gm} \)
c. \( 0.25 \mathrm{gm} \)
D. 0.125 gm
| 1 |
Chemistry
|
A ray of light strikes a glass plate at an angle of \( 60^{0} . \) If the reflected and
refracted rays are perpendicular to each other the index of refraction of glass is
A \( \cdot \frac{1}{2} \)
B. \( \frac{\sqrt{3}}{2} \)
\( c \cdot \frac{3}{2} \)
D. 1.732
| 3 |
Physics
|
A die is thrown. Write the sample space.
If \( A \) is the event that the number is a
perfect square, write the event \( \boldsymbol{A} \) using set notation.
| 2 |
Maths
|
Isotopes differ in:
A. no. of electrons
B. no. of protons
C. no. of neutrons
D. chemical reactivity
| 1 |
Chemistry
|
A true solution (or simply a solution) is a homogeneous mixture, in which the solute and solvent molecules cannot be
distinguished even under a microscope.
A. True
B. False
| 1 |
Chemistry
|
Versatile anthers occur in
A. Helianthus annuus
B. Oryza sativa
c. solanum tuberosum
D. Hibiscus esculentus
| 0 |
Biology
|
The volume of spherical ball is increasing at the rate of \( 4 \pi c c / \) sec. Then rate of surface area when volume is
\( 288 \pi c c \) is
\( ^{\mathbf{A}} \cdot \frac{3 \pi}{4} c m^{2} / s e c \)
B. \( \frac{4}{3} c m^{2} / \) sec
c. \( \frac{4 \pi}{3} \mathrm{cm}^{2} / \mathrm{sec} \)
D. \( \frac{3}{4} c m^{2} / \) sec
| 2 |
Maths
|
Evaluate \( \sum_{n=1}^{N} U_{n} \) if
\[
\boldsymbol{U}_{\boldsymbol{n}}=\mid \begin{array}{ccc}\boldsymbol{n} & \mathbf{1} & \mathbf{5} \\ \boldsymbol{n}^{2} & \boldsymbol{2} \boldsymbol{N}+\mathbf{1} & \boldsymbol{2} \boldsymbol{N}+\mathbf{1} \\ \boldsymbol{n}^{\boldsymbol{3}} & \boldsymbol{3} \boldsymbol{N}^{2} & \boldsymbol{3} \boldsymbol{N}\end{array}
\]
| 2 |
Maths
|
Two cells of equal emf and of internal
resistances \( r_{1} \) and \( r_{2}\left(r_{1}>r_{2}\right) \) are
connected in series. On connecting this combination to an external resistance
\( \mathrm{R}, \) it is observed that the potential difference across the first cell becomes
zero. The value of R will be.
\( \mathbf{A} \cdot r_{1}+r_{2} \)
В. \( r_{1}-r_{2} \)
c. \( \frac{r_{1}+r_{2}}{2} \)
D. \( \frac{r_{1}-r_{2}}{2} \)
| 3 |
Physics
|
Find the value of \( k \) for which the
equation \( 3 x^{2}-6 x+k=0 \) has distinct
and real root.
| 2 |
Maths
|
Which of the following statement(s)
is/are correct?
This question has multiple correct options
A. Rhombic sulphur is stable at room temperature.
B. Monoclinic sulphur is stable at room temperature.
C. Both rhombic and monoclinic sulphur has the molecular formula \( S_{8} \)
D. Both rhombic and monoclinic sulphur are soluble in \( C S_{2} \)
| 1 |
Chemistry
|
If \( f(x)=l x \) and \( a, b, c \) are in A.P. \( k, l \) are
constants. Then \( \boldsymbol{f}(\boldsymbol{a}-\boldsymbol{k}), \boldsymbol{f}(\boldsymbol{b}-\boldsymbol{k}), \) and
\( f(c-k) \) are in
A . A.
в. с.
c. н.
D. A.G.P
| 2 |
Maths
|
(A) Draw a diagram showing the path of a monochromatic light through a triangular prism.
(B) Using this diagram obtain the relation \( n_{21}=\frac{\sin \left(\frac{A+D_{m}}{2}\right)}{\sin \left(\frac{A}{2}\right)} \)
| 3 |
Physics
|
The advantage/s associated with water harvesting at the community level is/are
A. The ground water level increases due to recharging of wells
B. Ground water keeps the layers of soil above it moist and prevents loss of water by evaporation.
c. Ground water keeps the layers of soil above it dry and prevents loss of water by evaporation
D. Both A and B
| 0 |
Biology
|
A ball is dropped from a height of \( 1 m \) The coefficient of restitution between the ground and the ball is \( 1 / 3 . \) The height to which the ball will rebound after two collisions with ground is :
A. \( 9 m \)
в. \( 1 / 9 m \)
c. \( 1 / 81 m \)
D. \( 81 m \)
| 3 |
Physics
|
The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as
A. Reflection
B. Refraction
c. Dispersion
D. None
| 3 |
Physics
|
The graph of the equation \( x^{2}+\frac{y^{2}}{4}=1 \)
is
A. an ellipse
B. a circle
c. a hyperbola
D. a parabola
E. two straight lines
| 2 |
Maths
|
For making distinction between 2
pentanone and 3-pentanone the reagent to be employed is :
A \( \cdot K_{2} C r_{2} O_{7} / H_{2} S O_{4} \)
в. \( Z n-H g / H C l \)
\( \mathrm{c} \cdot \operatorname{Se} \mathrm{O}_{2} \)
D \( \cdot I_{2} / N a O H \)
| 1 |
Chemistry
|
A current of 5 A is flowing at 220 V in the primary coil of a transformer. if the voltage produced in the secondary coil
is \( 2200 \mathrm{V} \) anf \( 50 \% \) of power is lost, then the current in secondary will be
| 3 |
Physics
|
Show that between any two roots of the
equation \( e^{x} \cos x=1 \) there exists
atleast one root of \( e^{x} \sin x-1=0 \) by continuity and differentiability.
| 2 |
Maths
|
The mass number of a nucleus is:
A. Always less than atomic number
B. Always more than atomic number
C. Equal to atomic number
D. More than or equal to atomic number
| 3 |
Physics
|
Four resistance \( 5 \Omega, 10 \Omega, 15 \Omega \) and an unknown \( X \Omega \) are connected in series
so as to form Wheatsones network.
Determine the unknown resistance \( \boldsymbol{X} \)
if the network is balance with these
numerical values of resistances.
| 3 |
Physics
|
Write definition of molecularity of
reaction.
| 1 |
Chemistry
|
When two infinitely long parallel wires
separated by a distance of \( 1 m, \) each carry a current of \( 3 A \), the force in newton/metre length experienced by each will be, \( \left(\operatorname{given} \mu_{0}=4 \pi \times 10^{-7} \mathrm{S.I}\right. \)
Units).
A. \( 2 \times 10^{-7} \)
B. \( 3 \times 10^{-7} \)
c \( .6 \times 10^{-7} \)
D. \( 18 \times 10^{-7} \)
| 3 |
Physics
|
Comment on the dual position of hydrogen in the periodic table
| 1 |
Chemistry
|
Which of the following complexes is(are) paramagnetic? This question has multiple correct options
A \( \cdot\left[M n\left(C N_{6}\right)\right]^{3-} \)
B . \( \left[C r\left(N H_{3}\right)_{6}\right]^{3} \)
c. \( \left[F e(C N)_{6}\right]^{4+} \)
D. \( \left[C o(C N)_{6}\right]^{3} \)
| 1 |
Chemistry
|
If the surface area of a sphere is \( 324 \pi c m^{2} \) then its volume is
\( \mathbf{A} \cdot 950 \pi \mathrm{cm}^{3} \)
В. \( 972 \pi \mathrm{cm}^{3} \)
\( \mathbf{c} \cdot 975 \pi \mathrm{cm}^{3} \)
D. \( 980 \pi \mathrm{cm}^{3} \)
| 2 |
Maths
|
In an aquatic environment, microscopic animals and plants are collectively known as
A. Commensals
B. Herbivores
c. Fauna and flora
D. Planktons
| 0 |
Biology
|
In the reaction, \( \boldsymbol{F e}+\mathbf{2 H C l} \rightarrow \)
\( F e C l_{2}+H_{2} . \) what is the oxidation state
of Fe in \( \boldsymbol{F e C l}_{2} \) ?
\( A \cdot+2 \)
\( B \cdot+3 \)
\( c \cdot+4 \)
D. +5
| 1 |
Chemistry
|
The ions responsible for the bleaching action of bleaching powder and the ions responsible for loss of bleaching action of bleaching powder due to the storage for long time respectively are:
A \( \cdot C l^{-}, O C l \)
в. \( O C l^{-}, C l \)
c. \( O C l^{-}, C l O_{3} \)
D. \( C l^{-}, C l O^{-} \)
| 1 |
Chemistry
|
Two particles of equal mass m have respective initial velocties \( u \hat{i} \) and \( u\left(\frac{\hat{i}+\hat{j}}{2}\right) . \) They collide completely inelastically. The energy lost in the
process is?
A \( \cdot \frac{1}{3} m u^{2} \)
B. \( \sqrt{\frac{2}{3}} m u^{2} \)
c. \( \frac{3}{4} m u^{2} \)
D. \( \frac{1}{8} m u^{2} \)
| 3 |
Physics
|
A circus is climbing a \( 20 m \) long rope, which is tightly stretched and tied from the top of vertical pole to the ground. Find the height of the pole if the angle made by the rope with the ground level
is \( 30^{\circ} \)
A \( .24 m \)
в. 18 т
c. \( 28 m \)
D. \( 10 m \)
| 2 |
Maths
|
\( \int \frac{(\mathbf{2} \boldsymbol{x}+\mathbf{1})}{\left(\boldsymbol{x}^{2}+\mathbf{4} \boldsymbol{x}+\mathbf{1}\right)^{\frac{\mathbf{3}}{\mathbf{2}}}} \boldsymbol{d} \boldsymbol{x} \)
A. \( \frac{x^{3}}{\left(x^{2}+4 x+1\right)^{\frac{1}{2}}}+C \)
в. \( \frac{x}{\left(x^{2}+4 x+1\right)^{\frac{1}{2}}}+C \)
c. \( \frac{x^{2}}{\left(x^{2}+4 x+1\right)^{\frac{1}{2}}}+C \)
D. \( \frac{1}{\left(x^{2}+4 x+1\right)^{\frac{1}{2}}}+C \)
| 2 |
Maths
|
Pure water, cooled to \( -15^{\circ} \mathrm{C} \), is kept in an
insulated flask. Some ice is dropped
into the flask. The fraction of water
frozen into ice is (specific heat of ice =
\( 0.5 \mathrm{cal} / \mathrm{g}^{-0} \mathrm{C}, \) specific heat of water \( =1 \)
\( \left.\operatorname{cal} / g^{-o} C\right) \)
A \( .6 / 29 \)
B. 3/35
\( c \cdot 6 / 35 \)
D. 2/35
| 3 |
Physics
|
Explain with the help of suitable example polar convalent bond.
| 1 |
Chemistry
|
Why bakelite does not become soft on
heating?
| 1 |
Chemistry
|
The bond angle in ammonia is \( 109^{\circ} 28^{\prime} \)
A. True
B. False
| 1 |
Chemistry
|
In the given elements, which element does not have 2 valence electrons?
A. Ba
B. zn
c. Na
D. ca
| 1 |
Chemistry
|
Which of the following charges is/are impossible?
A \( \cdot 4.8 \times 10^{-18} \mathrm{C} \)
B . \( 5.8 \times 10^{-18} \mathrm{C} \)
c. \( 12.8 \times 10^{-18} \mathrm{C} \)
D . \( 20.8 \times 10^{-18} \mathrm{C} \)
| 3 |
Physics
|
A jet of a liquid of density \( \rho \) with a cross-sectional area A is incident at an
angle \( \theta \) on a wall with a velocity \( v \) and
bounces with no loss of energy. The angle \( \theta \) is measured with respect to the
wall. The force in a direction normal
to the surface of the wall is:
A \( \cdot 2 \rho A v^{2} \cos \theta \)
B. \( 2 \rho A v^{2} \sin \theta \)
\( \mathbf{c} \cdot 2 \rho A v^{2} \cos ^{2} \theta \)
D. \( 2 \rho A v^{2} \sin ^{2} \theta \)
| 3 |
Physics
|
\( y=\sin ^{2} x+4 \sin x+5 . \) Then which of
the following statements is correct? \( (D: \text { Domain, } R: \text { Range }) \)
A \( D=R \)
\( R \)
B . \( D:[2,10] \)
c. \( D:[2,10]-\{0\} \)
D. \( R:[2,10] \)
| 2 |
Maths
|
toppr
\( Q \) тур
the photosphere) of the star emits radiations of all wavelengths, producing continuous spectrum. When these radiations pass through the outer, relatively cooler, layer of the star, the radiations of certain wavelengths are selectively absorbed by this layer. This explains the dark lines in the spectrum of a star. The dark lines are
characteristic of the substances
present in the outer layer of the star. The surface temperature T of a star can be estimated by measuring the
wavelengths \( \lambda_{m} \) at which the intensity of the emitted radiation is maximum and then using Wien's displacement
law which states that \( \lambda_{m} \times \mathrm{T}=\mathrm{b} \) where
b is a constant called Wien's constant
and the above relation is called Wien's
Displacement Law which states that as the temperature increases, the maximum intensity of emission shifts (or is displaced) towards the shorter wavelengths. The value of constant has been found experimentally to be
\( 2.89 \times 10^{-3} \mathrm{mK} \)
Which one of the curves shown in Fig represents the spectral distribution of
energy \( E_{\lambda} \) of black body radiations
where \( \lambda \) is the wavelength?
4
B.
\( c \)
D.
| 3 |
Physics
|
The products \( (A) \) and \( (B) \) are :
\( A \)
\( B \)
C. both A and B
D. none of the above
| 1 |
Chemistry
|
A saturated solution of silver benzoate
has a \( p H \) of \( 8.63 . K_{a} \) for benzoic acid is
\( 6.5 \times 10^{-5} . K_{s p} \) of silver benzoate will
be
A. \( 1.4 \times 10^{-2} \) mol \( ^{2} \) litre \( ^{-2} \)
B . \( 1.9 \times 10^{-2} \) mol \( ^{2} \) litre \( ^{-2} \)
c. \( 2.4 \times 10^{-2} \) mol \( ^{2} \) litre \( ^{-2} \)
D. none of these
| 1 |
Chemistry
|
A body of mass \( \mathrm{M} \) is resting on a rough horizontal plane surface, the coefficient
of friction being equal to \( \mu . A t t=0, a \)
horizontal force \( \boldsymbol{F}=\boldsymbol{F}_{0} \boldsymbol{t} \) starts acting
on it, where \( F_{0} \) is a constant. Find the
time \( T \) at which the motion starts?
A. \( \mu M g / F_{0} \)
\( \mathbf{B} \cdot M g / \mu F_{0} \)
\( \mathbf{c} \cdot \mu F_{0} / M g \)
D. None of these
| 3 |
Physics
|
Solve:
\( \left[\begin{array}{ccc}1 & 5 & -2 \\ 3 x & 2 & 4 \\ 5 & -1 & 0\end{array}\right]=0 \)
| 2 |
Maths
|
If both the mass and radius of the earth
decrease by \( 1 \% \) the acceleration due to gravity on the surface of the earth will
A. decrease by \( 1 \% \)
B. increase by \( 1 \% \)
c. increase by \( 2 \% \)
D. remain unchanged
| 3 |
Physics
|
If \( \frac{b+c-a}{a}, \frac{c+a-b}{b}, \frac{a+b-c}{c} \) are in
\( A . P ., \) then which of the following is in
A.P.?
This question has multiple correct options
A. \( a, b, c \)
B \( \cdot a^{2}, b^{2}, c^{2} \)
c. \( \frac{1}{a}, \frac{1}{b}, \frac{1}{c} \)
D. \( b c, a c, a b \)
| 2 |
Maths
|
Which of the following species has a molecular shape similar to that of
ammonia, \( N H_{3} ? \)
\( A \cdot B H_{3} \)
в. \( H_{2} O \)
\( \mathrm{c} \cdot \mathrm{H}_{3} \mathrm{O}^{+} \)
D. \( C H_{4} \)
E \( . N H_{4}^{+} \)
| 1 |
Chemistry
|
State whether true or false.
A freely falling body means a body whose acceleration is equal to the
acceleration due to gravity but its initial velocity may or may not be zero.
A. True
B. False
| 3 |
Physics
|
\( f(x)=x+\sin x \) is decreasing when \( x \)
lies in the interval
A \( \cdot[-1,1] \)
B. [2,3]
c. [3,4]
D. No value of \( x \)
| 2 |
Maths
|
The correct relationship between \( T_{c}, T_{b} \)
and \( \boldsymbol{T}_{\boldsymbol{i}} \) is:
| 1 |
Chemistry
|
The term vitamin was introduced by
A. Dr. Funk
B. Dr Edwards
c. Dr.Strepto
D. Dr Indira Hinduja
| 1 |
Chemistry
|
\( \boldsymbol{C H}_{3} \boldsymbol{M} \boldsymbol{g} \boldsymbol{X}^{C \boldsymbol{H}_{3}} \stackrel{C O O C_{2} \boldsymbol{H}_{5}}{\boldsymbol{A}} \stackrel{N a}{\rightarrow} \boldsymbol{B}^{C_{2}} \frac{\boldsymbol{H}_{5} \boldsymbol{O H}}{\longrightarrow} \)
\( C \)
Here, \( C \) is :
A \( \cdot C_{2} H_{5} O C_{2} H_{5} \)
в. \( C H_{3} \) СООС\( _{2} \) Нь
c. \( C H_{3} C O O C H_{3} \)
D. \( \left(C H_{3}\right)_{3} C O C_{2} H_{5} \)
| 1 |
Chemistry
|
Nitrogen molecule is a non polar
covalent compound.
A. True
B. False
| 1 |
Chemistry
|
molecular formula \( C_{4} H_{8} O_{3} . \) It evolves
\( C O_{2} \) with \( N a H C O_{3} .^{\prime} X^{\prime} \) on reaction with
Li \( A l H_{4} \) give achiral compound 'X' is:
\( A \)
B
\( c \)
D.
| 1 |
Chemistry
|
As the succession proceeds number and types of \( _{\text {一一一一一一一一一 }} \) change.
A. Vegetation
B. Animals
c. Vegetation and animals
D. Vegetation, animals and decomposers
| 0 |
Biology
|
If \( \Delta E \) is the heat of reaction for
\( \boldsymbol{C}_{2} \boldsymbol{H}_{5} \boldsymbol{O} \boldsymbol{H}(\boldsymbol{l})+\boldsymbol{3} \boldsymbol{O}_{2}(\boldsymbol{g}) \longrightarrow \)
\( 2 C O_{2}(g)+3 H_{2} O(l) \)
at constant volume, the \( \Delta \boldsymbol{H} \) (heat of
reaction at constant pressure), at constant temperature is:
A. \( \Delta H=\Delta E+R T \)
B. \( \Delta H=\Delta E-R T \)
c. \( \Delta H=\Delta E-2 R T \)
D. \( \Delta H=\Delta E+2 R T \)
| 1 |
Chemistry
|
toppr
Q Type your question
\( r, \) as seen in the picture.
If each of the diagrams among the
possible answers shows flies with the same acceleration as the one pictured
directly below, which fly has a speed that is twice the speed of the fly pictured directly below?
\( A \)
B.
\( c \)
radius \( =r / 2 \)
D.
radius \( =r / 4 \)
E. None of the objects in this question are accelerating
since thev al speed
| 3 |
Physics
|
de-Broglie wavelength associated with
an electron revolving in the \( n^{t h} \) state of hydrogen atom is directly proportional
to
A \( . n \)
в. \( \frac{1}{n} \)
c. \( n^{2} \)
D. \( \frac{1}{n^{2}} \)
| 3 |
Physics
|
The surface density on the copper
sphere is \( \sigma . \) The electric field strength
on the surface of the sphere is:
\( A \)
B . \( \sigma / 2 \)
c. \( \sigma / 2 \varepsilon_{0} \)
D. \( \sigma / \varepsilon_{0} \)
| 3 |
Physics
|
The formula of trimethylaluminium is:
A \( . A l_{2}\left(C H_{3}\right)_{6} \)
B \( . A l\left(C H_{6}\right)_{3} \)
\( \mathbf{c} \cdot A l\left(C H_{2}\right)_{6} \)
D. None of the above
| 1 |
Chemistry
|
The first satellite to put into space by India is:
A . INSAT
B. Aryabhatta
c. Rohini
D. Bhaskara
| 3 |
Physics
|
In the group \( G=\{1,5,7,11\} \) under \( \otimes_{12} \)
the value of \( 7 \otimes_{12} 11^{-1} \) is equal to
\( \left(\otimes_{12}: \text { under multiplication modulo } 12\right) \)
A . 5
B. 7
c. 11
D.
| 2 |
Maths
|
State True or False.
On hills, water boils quickly.
A. True
B. False
| 1 |
Chemistry
|
Explain in brief criteria for animal classification.
| 0 |
Biology
|
If the sum of first \( p \) terms of an \( A . P . \) is
equal to the sum of the first \( q \) terms,
then find the sum of the first \( (\boldsymbol{p}+\boldsymbol{q}) \)
terms.
| 2 |
Maths
|
Number of coulombs required to
liberate 0.5 mol of \( \boldsymbol{O}_{2} \) is:
A . 19300
B. 193000
c. 96500
D. 9650
| 1 |
Chemistry
|
Cradle of human evolution is
A. Grassland of South Africa
B. Savannah of Central Africa
C. Subarctic Europe
D. Arabia
| 0 |
Biology
|
From the stress against strain graph, the behavior of the wire between elastic
limit and yield point is :
A. Perfectly elastic
B. Formation of neck
c. Perfectly plastic
D. Elastic but with permanent deformation
| 3 |
Physics
|
The following circular diagrams represents the yield of gram. If the yield
in field-A is 400 kg, then the yield in field-B will be
A. \( 600 \mathrm{kg} \)
в. \( 800 \mathrm{kg} \)
c. 900 kg
D. 1200kg
| 2 |
Maths
|
Find the length of a chord which is at a distance of \( 3 \mathrm{cm} \) from the centre of a
circle of radius \( 5 \mathrm{cm} \)
A . \( 2 \mathrm{cm} \)
B. \( 6 \mathrm{cm} \)
\( c \cdot 8 \mathrm{cm} \)
D. \( 10 \mathrm{cm} \)
| 2 |
Maths
|
The following tripeptide can be
represented as.
\( \mathbf{A} \cdot \operatorname{Tyr}-V a l-T h r \)
B. Phe \( -A l a- \)Ser
c. \( P h e- \)Leu\( - \)Cys
D. \( L y s-A l a-S e r \)
| 1 |
Chemistry
|
Which of the following oxides of nitrogen is used as an anaesthetic?
A . \( N O \)
в. \( N O_{2} \)
\( \mathrm{c} \cdot \mathrm{N}_{2} \mathrm{O} \)
D. \( N_{2} O_{5} \)
| 1 |
Chemistry
|
Two gases, carbon monoxide \( (C O) \) and
nitrogen \( \left(N_{2}\right) \) at the same temperature
have kinetic energies \( \boldsymbol{E}_{1} \) and \( \boldsymbol{E}_{2} \)
respectively. Then
A \( . E_{1}=E_{2} \)
в. \( E_{1}>E_{2} \)
\( \mathbf{c} \cdot E_{1}<E_{2} \)
D. \( E_{1} \) and \( E_{2} \) cannot be compared
| 3 |
Physics
|
The angle of inclination of a straight line parallel to \( x \) -axis is equal to
A \( \cdot 0^{\circ} \)
В. \( 60^{\circ} \)
\( c \cdot 45^{\circ} \)
D. \( 90^{\circ} \)
| 2 |
Maths
|
The inert gas present in the second long period is:
A. \( K r \)
в. \( X e \)
\( c . A r \)
D. Rn
| 1 |
Chemistry
|
The moon's radius is \( \frac{1}{4} \) that of the earth and its mass is \( \frac{1}{80} \) times that of the earth. If \( g \) represents the acceleration due to gravity on the surface of the earth, that on the surface of the moon
is
A. \( \frac{g}{4} \)
в. \( \frac{g}{5} \)
c. \( \frac{g}{6} \)
D. \( \frac{g}{8} \)
| 3 |
Physics
|
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