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If \( \boldsymbol{A}=\left[\begin{array}{l}\mathbf{1} \\ \mathbf{2} \\ \mathbf{3}\end{array}\right], \) then find \( \boldsymbol{A} \boldsymbol{A}^{\boldsymbol{T}} \)
| 2 |
Maths
|
\( B F_{3} \) has less lewis acidic property than
\( B B r_{3} . \) Why?
A. 0
в.
c. no idea
D. wron question
| 1 |
Chemistry
|
Mixed ether will not be formed in the
reaction?
A \( \cdot C H_{3} O C H_{2} C l+C_{2} H_{5} M g B r \)
в. \( C H_{2} N_{2}+C_{2} H_{5} O H \)
c. \( C_{2} H_{5} O N a+C H_{3} \)
D. \( C_{2} H_{5} O H+H_{2} S O_{4}\left(140^{0} C\right) \)
| 1 |
Chemistry
|
ff \( P=\{a, b\} \) and \( Q=\{x, y, z\}, \) show
that \( \boldsymbol{P} \times \boldsymbol{Q} \neq \boldsymbol{Q} \times \boldsymbol{P} \)
| 2 |
Maths
|
Typical battery used is the mercury cell, which is used in?
A . Electric watches
B. Television sets
c. Radio transistors
D. Electric torches
| 1 |
Chemistry
|
DNA synthesis occurs in
A. G-phase
B. S-phase
c. \( G_{2} \) phase
D. M phase
| 0 |
Biology
|
\( \begin{array}{ll}\text { Types of roots } & \text { Plants } \\ \text { A) Prop root } & \text { 1) Radish } \\ \text { B) Epiphytic root } & \text { 2) Turnip } \\ \text { C) Stilt root } & \text { 3) Cassava } \\ \text { D) Tuberous root } & \text { 4) Baniyan } \\ \text { E) Fusiform } & \text { 5) Maize } \\ \text { F) Napiform } & \text { 6) Orchid }\end{array} \)
\( \mathbf{A} \)
\( A-1, B-2, C-3, D-4, E-5, F-7 \)
7
B. A-2, B-4, C-6, D-1, E-2, F- 5
C. \( A-4, B-6, C-5, D-3, E-1, F-2 \)
D. A- 4, B-1, C- 2, D-3, E- 5, F- 6
| 0 |
Biology
|
A light bulb burns in front of the center
of a \( 40 \mathrm{cm} \) wide plane mirror that is hung vertically on a wall. A man walks
in front of the mirror along a line that is parallel to the mirror and twice as far from it as the bulb. The greatest
distance he can walk and still see the
image of the bulb.
\( \mathbf{A} \cdot 20 \mathrm{cm} \)
B. \( 40 \mathrm{cm} \)
c. \( 60 \mathrm{cm} \)
D. \( 120 \mathrm{cm} \)
| 3 |
Physics
|
A hollow cylinder with a very thin wall and a block are placed at rest at the top
of a plane with inclination \( \boldsymbol{\theta}=\mathbf{4 5}^{\circ} \)
above the horizontal. The cylinder rolls down the plane without slipping and the block slides down the plane; it is found
that both objects reach the bottom of the plane simultaneously. If the coefficient of kinetic friction between
the block and the plane is \( \mu, \) the value of
\( 18 \mu \) is
| 3 |
Physics
|
In the Born-Haber cycle for the
formation of solid common salt (Nacl)
the largest contribution comes from
A. the low ionization potential of \( N a \)
B. the high electron affinity of \( C l \)
C. the low \( \Delta H_{v a p} \) of \( N a(s) \)
D. the lattice energy
| 1 |
Chemistry
|
Evaluate the given integral \( \int x \cdot \operatorname{cosec}^{2} x d x \)
| 2 |
Maths
|
Choose the correct option
A. A clinical thermometer should be washed using water before and after use
B. A clinical thermometer should be washed using antiseptic solution before and after use
C. A clinical thermometer can be used after it is heated by fire
D. None of the above
| 3 |
Physics
|
For the dichromate dianion, which of the
following is true?
1) \( 4 C r-O \) bonds are equivalent
2) \( 6 C r-O \) bonds are equivalent
| 1 |
Chemistry
|
From the experimental data, the compositions are found as barium = \( 58.81 \% \), sulfur \( =13.73 \% \), and oxygen \( = \)
\( 27.46 \% . \) Predict the empirical formula of the compound.
A. \( B a S O_{4} \)
в. \( B a S_{2} O \)
c. \( B a_{2} S O_{3} \)
D. \( B a S_{2} O_{4} \)
E \( . B a_{2} \mathrm{SO}_{4} \)
| 1 |
Chemistry
|
Spin only magnetic moment value of \( C r^{3+} \) ion is:
A . 2.87 вм
в. 3.87 вм
\( \mathrm{c} .3 .47 \) вм
D. 3.67 ВМ
| 1 |
Chemistry
|
Which of the following phenomena can be demonstrated by light. But not with sound waves in an air column?
A . Reflection
B. Diffraction
c. Refraction
D. Polarization
| 3 |
Physics
|
The value of the integral \( \int_{-a}^{a} \frac{x e^{x^{2}}}{1+x^{2}} d x \)
is
A \( \cdot e^{a^{2}}^{2} \)
B.
\( \mathbf{c} \cdot e^{-a^{2}}^{2} \)
D. \( a \)
| 2 |
Maths
|
A house is fitted with ten lamps of each
\( 60 W . \) Each lamp burns for 5 hrs a day
on an average. The cost of consumption in a month of 30 days at 2.80 rupees
per unit is:
A . Rs.152
B. Rs.252
c. \( R s .352 \)
D. Rs.452
| 3 |
Physics
|
(5,0) is a point that lies on
A. \( y \) -axis
B. \( x \) -axis
\( \mathbf{c} \cdot y=x \)
D. \( y=5 x \)
| 2 |
Maths
|
Cohesion-tension theory regading ascent of sap was given by
A. Dixon and Jolly
B. J.C. Bose
c. christian Wolf
D. Godlewski
| 0 |
Biology
|
Two triangles having the same base (or
equal bases) and equal areas lie
between the same parallels
| 2 |
Maths
|
How many times a normal man respires per minute?
A. \( 10-15 \) times
B. \( 14-18 \) times
c. \( 20-25 \) times
D. \( 25-30 \) times
| 0 |
Biology
|
Specific heat of water is \( 4.2 J / g^{o} C . \) I
light of frequency \( 3 \times 10^{9} H z \) is used to
heat \( 400 g m \) of water from \( 20^{\circ} \mathrm{C} \) to
\( 40^{\circ} \mathrm{C}, \) the number of photons needed
will be?
A . \( 1.69 \times 10^{29} \)
B. \( 1.69 \times 10^{28} \)
C \( \cdot 2.80 \times 10^{4} \)
D. \( 2.80 \times 10^{5} \)
| 3 |
Physics
|
If egg of an organism has \( 10 p g \) of DNA in its nucleus. How much DNA would a
diploid cell of same organism have in
\( G_{2} \) phase of meiosis?
A . \( 10 p g \)
B. \( 5 p g \)
\( \mathrm{c} \cdot 2 p g \)
D. \( 40 p g \)
| 0 |
Biology
|
A light ray is incident normally on the
surface \( A B \) of a prism of refracting angle
\( 60^{\circ} . \) If the light ray does not emerge from
\( A C, \) then find the refractive index of the
prism.
\( ^{A} \cdot_{\mu} \geqslant \frac{\sqrt{3}}{2} \)
B. \( _{\mu} \leqslant \frac{\sqrt{3}}{2} \)
\( c \cdot_{\mu} \geqslant \frac{2}{\sqrt{3}} \)
D. \( _{\mu} \leqslant \frac{2}{\sqrt{3}} \)
| 3 |
Physics
|
The area bounded by the curves \( x+ \)
\( \mathbf{2}|\boldsymbol{y}|=\mathbf{1} \) and \( \boldsymbol{x}=\mathbf{0} \) is?
A \( \cdot \frac{1}{4} \)
в. \( \frac{1}{2} \)
\( c .1 \)
D. 2
| 2 |
Maths
|
Number of plants described by
Linnaeus is
A . 15000
B. 13291
\( c .5900 \)
D. 2781
| 0 |
Biology
|
State whether the statement is true or
false.
Statement: Generally non-metals react
with acids.
A. True
B. False
| 1 |
Chemistry
|
Assertion
Nitric oxide, though an odd electron molecule in diamagnetic in liquid state
Reason
There occurs only partial dimerisation
of \( N O \) to \( N_{2} O_{2} \)
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
| 1 |
Chemistry
|
Explain the formation of following compound:
CaO
\( \boldsymbol{C a}:[\boldsymbol{A r}] \boldsymbol{4 s}^{2} \longrightarrow \boldsymbol{C a}^{2+}[\boldsymbol{A r}] \quad \boldsymbol{O}: \)
\( 1 s^{2} 2 s^{2} 2 p^{4} \longrightarrow \)
\( \boldsymbol{O}^{2-} \mathbf{1} \boldsymbol{s}^{2} \mathbf{2} \boldsymbol{s}^{2} \mathbf{2} \boldsymbol{p}^{\boldsymbol{6}} \quad \boldsymbol{C} \boldsymbol{a}^{\mathbf{2}+}[\boldsymbol{:} \ddot{\boldsymbol{O}}:]^{2-} \)
If true enter 1 , else enter 0 .
| 1 |
Chemistry
|
Select the correct statement.
\( \mathbf{A} \cdot \) The \( S-F \) bond length is longer in \( S F_{6} \) compared to
that in \( S F_{2} \)
B. In \( P C l_{5} \) axial bonds are smaller than of equatorial bonds.
C \( \cdot \ln I F_{7} \) axial bonds are longer than that of equatorial bonds
D. All are correct.
| 1 |
Chemistry
|
A bus travelling along a straight highway covers one-third of the total distance between two places with a velocity \( 20 k m h^{-1} . \) The remaining part
of the distance was covered with a
velocity of \( 30 k m h^{-1} \) for the first half of
the remaining time and with velocity
\( 50 k m h^{-1} \) for the next half of the time.
Find the average velocity of the bus for its whole journey.
| 3 |
Physics
|
The particle of charge \( q \) and mass \( m \) starts moving from origin under the
action of an electric field \( \boldsymbol{E}=\boldsymbol{E}_{0} \boldsymbol{i} \) and
magnetic field \( V=V_{0} i . \) Its velocity at \( (x, 3,0) \) is \( (4 i+3 \hat{i}) . \) The value of \( x \) is :
A. \( \frac{\sqrt{3} m v_{0}}{q E} \)
в. \( \frac{25 m}{2 q E_{o}} \)
c. \( \frac{10 m}{q E_{o}} \)
D. \( \frac{25 E_{0} B_{0}}{m} \)
| 3 |
Physics
|
Water expands when it freezes. Determine amount of work in joules,
done when a system consisting of \( 1.0 L \) of liquid water freezes under a constant
pressure of \( 1.0 a t m \) and forms \( 1.1 L \) of
¡ce.
| 1 |
Chemistry
|
What is the function of refrigerants in
heat pumps?
A. Refrigerants supply heat to the atmosphere
B. Refrigerants evaporate heat and cool the room
C. Refrigerant carries heat from the atmosphere to the room, which is to be heated
D. None of these
| 3 |
Physics
|
\( \lim _{x \rightarrow \infty} \sin x \) is equal to:
\( \mathbf{A} \cdot 0 \)
\( B . \infty \)
C. Exists is finite and non-zone
D. Does not exist
| 2 |
Maths
|
The output \( Y \) of the logic circuit given
above is:
\( \mathbf{A} \cdot \bar{A}+B \)
в. \( \bar{A} \)
c. \( \overline{(\bar{A}+B)} \cdot \bar{A} \)
D. \( \overline{(\bar{A}+B)} \cdot \). \( A \)
| 3 |
Physics
|
\( \sin 3 x+\sin x+2 \cos x=\sin 2 x+ \)
\( 2 \cos ^{2} x \)
| 2 |
Maths
|
The resistances of a platinum resistance thermometer at the ice
point, the steam point and the boiling point of sulphur are 2.50,3.50 and 6.50 \( \Omega \) respectively. Find the boiling point
\( ^{o} C \) ) of sulphur on the platinum scale. The ice point and the steam point
measure \( 0^{\circ} \mathrm{C} \) and \( 100^{\circ} \mathrm{C} \) respectively
| 3 |
Physics
|
If the third term in the expansion of \( \left[x+x^{\log _{10} x}\right]^{5} \) is \( 10^{6}, \) then \( x \) can be
This question has multiple correct options
A \( \cdot 10^{-1 / 3} \)
B. 10
c. \( 10^{-5 / 2} \)
D. \( 10^{2} \)
| 2 |
Maths
|
Examine the applicability of Mean Value Theorem for the following function. \( f(x)=x^{2}-1 \) for \( x \epsilon[1,2] \)
| 2 |
Maths
|
The total energy of electron in the ground state of hydrogen atom is 13.6
eV. The kinetic energy of an electron in the first excited state is :
A \( .1 .7 e V \)
B. \( 3.4 e V \)
c. \( 6.8 e V \)
D. \( 13.6 e V \)
| 1 |
Chemistry
|
What is the unit of ratio \( \frac{E}{H} ? \)
| 3 |
Physics
|
Calculate \( \left[\boldsymbol{H}^{+}\right] \) in a \( \mathbf{0 . 2 0} \boldsymbol{M} \) solution of
dichloroacetic acid \( \left[\boldsymbol{K}=\mathbf{5} \times \mathbf{1 0}^{-\mathbf{2}}\right] \)
that also contains \( 0.1 ~ M \) sodium
dichloroacetate. Neglect hydrolysis of sodium salt.
A. \( 0.078 M \)
В. 0.05 М
c. \( 0.06 M \)
D. \( 0.04 M \)
| 1 |
Chemistry
|
Three coins are tossed. Describe
three events \( A, B \) and \( C \) which are
mutually exclusive and exhaustive
| 2 |
Maths
|
The donations given to an orphanage home by the students of different classes of a secondary school are given below.
\( \begin{array}{ll}\text { Class } & \text { Donation by each } \\ & \text { students }(\text { in } R s)\end{array} \) No. of
students
donated
\( _{5} \) vı vıl 7 vııl 10 Ix 15 \( x \) 20
Find the mean, median and mode of the
data
A. Rs.11.26, Median = Rs.10; Mode = Rs.10
B. \( R s .1 .26, \) Median \( =R s .10 ; \) Mode \( =R s .10 \)
c. \( R s .11 .26, \) Median \( =R s .20 ; \) Mode \( =R s .10 \)
D. None of these
| 2 |
Maths
|
Assertion
STATEMENT-1: If \( f(x) \) is continuous on
\( [a, b], \) then there exists a point \( c \in(a, b) \)
such that \( \int_{a}^{b} f(x) d x=f(c)(b-a) \)
Reason
STATEMENT-2: For \( a<b \), if \( m \) and \( M \) are,
respectively, the smallest and greatest
values of \( \boldsymbol{f}(\boldsymbol{x}) \) on \( [\boldsymbol{a}, \boldsymbol{b}] \)
\( \operatorname{then} m(b-a) \leq \int_{a}^{b} f(x) d x \leq(b- \)
\( \boldsymbol{a}) \boldsymbol{M} \)
A. STATEMENT-1 is True, STATEMENT-2 is True STATEMENT-2 is a correct explanation for STATEMENT-
1
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
| 2 |
Maths
|
Which or tollowing Is an example of
Pinacol-Diazotization?
\( \mathbf{A} \)
\( B \)
\( c \)
D.
| 1 |
Chemistry
|
Van't Hoff's factor of aq. \( K_{2} S O_{4} \) at infinite dilution has value equal to:
\( \mathbf{A} \cdot \mathbf{1} \)
B. 2
\( c .3 \)
D. Between 2 and 3
| 1 |
Chemistry
|
Let \( A \) and \( B \) be two sets such that \( A \times \)
\( B \) Consists of 6 elements. If three
elements of \( A \times B \) are
(1,4),(2,6),(3,6) then \( B \times A . \) is \( = \)
\( \{(a, 1),(6,1),(4, d),(c, 2),(4,3)(b, 3)\} \)
Find \( \boldsymbol{a}+\boldsymbol{b}+\boldsymbol{c}+\boldsymbol{d} \)
| 2 |
Maths
|
The natural phenomenon which we are not yet able to predict accurately is:
A. earthquake
B. flood
c. volcanic erruption
D. thunderstorm
| 3 |
Physics
|
Fruits falling from a tree is an example of random motion?
A. True
B. False
| 3 |
Physics
|
Which of the following is the infrared wavelength?
A \( \cdot 10^{-4} \mathrm{cm} \)
B \( \cdot 10^{-5} \mathrm{cm} \)
\( \mathbf{c} \cdot 10^{-6} c m \)
D. \( 10^{-7} \mathrm{cm} \)
| 3 |
Physics
|
Find all the values of \( \theta \) which satisfy the equation: \( \cos \theta \cdot \cos 2 \theta \cdot \cos 3 \theta=1 / 4 \)
| 2 |
Maths
|
Let \( \boldsymbol{f}(\boldsymbol{x}) \) be defined in the interval [-2,2] such that \( f(x)= \)
\( \left\{\begin{array}{ll}-1, & -2 \leq x \leq 0 \\ x-1, & 0<x \leq 2\end{array} \text { and } g(x)=\right. \)
\( \boldsymbol{f}(|\boldsymbol{x}|)+|\boldsymbol{f}(\boldsymbol{x})| \) Test the differentiablity
of \( g(x) \) in (-2,2)
A. not derivable at \( x=0 \) and \( x=1 \)
B. derivable at all points
c. not derivable at \( x=0 \)
D. not derivable at \( x=1 \)
| 2 |
Maths
|
The value of \( \lim _{n \rightarrow \infty} \Sigma_{1}^{n} \sin \left(\frac{\pi}{4}+\frac{\pi i}{2 n}\right) \frac{\pi}{2 n}=? \)
\( ^{\mathbf{A}} \cdot \int_{\frac{\pi}{2}}^{\frac{\pi}{4}} \sin x d x \)
B. \( \int_{\frac{\pi}{2}}^{\frac{3 \pi}{4}} \sin x d x \)
\( ^{\mathrm{c}} \cdot \int_{\frac{\pi}{7}}^{\frac{3 \pi}{4}} \sin x d x \)
D. \( \int_{\pi}^{3 \pi} \sin x d x \)
| 2 |
Maths
|
Which are the different types of
ecosystems?
| 0 |
Biology
|
Define a relation \( R \) on the set \( N \) of
natural numbers by \( \boldsymbol{R}=\{(\boldsymbol{x}, \boldsymbol{y}): \boldsymbol{y}= \)
\( x+5, x \) is a natural number less than
\( \mathbf{4} ; \boldsymbol{x}, \boldsymbol{y} \in \boldsymbol{N}\} . \) Depict this relationship
using roster form. Write down the domain and the range.
| 2 |
Maths
|
In an hydrogen atom, the electron
revolves around the nucleus in an orbit
of radius \( 0.53 \times 10^{-10} m . \) Then the
electrical potential produced by the nucleus at the position of the electron is
| 3 |
Physics
|
One mole of steam is condensed at
\( 100^{\circ} \mathrm{C} \) the water is cooled to \( 0^{\circ} \mathrm{C} \) and
frozen to ice. Which of the following statements are correct, given heat of vapourization and fusion are \( 540 c a l / g m \) and \( 80 c a l / g m \) (average
heat capacity of liquid water \( =1 \) cal
\( \boldsymbol{g} \boldsymbol{m}^{-1} \boldsymbol{d} \boldsymbol{e} \boldsymbol{g} \boldsymbol{r} \boldsymbol{e} e^{-1} \boldsymbol{\} \)
This question has multiple correct options
A. Entropy change during the condensation of steam is \( -26.06 c a l /^{o} C \)
B. Entropy change during cooling of water from \( 100^{\circ} \mathrm{C} \) to \( 0^{o} C \) is \( -5.62 c a l /^{o} C \)
C. Entropy change during freezing of water at \( 0^{\circ} \mathrm{C} \) is \( -5.27 c a l /^{o} C \)
D. Total entropy change is -36.95 cal\( /^{\circ} \mathrm{C} \)
| 3 |
Physics
|
Find the difference of the arithmetic
progression an if \( a_{1}=7 \) and \( a_{3}=16 \)
A . 4.5
B. 5
\( c .5 .5 \)
D. 6
| 2 |
Maths
|
The centre of mass of a rigid body always lies inside the body. Is this statement true or false?
A. True
B. False
| 3 |
Physics
|
Who proposed the 'Binomial
Nomenclature System'?
A. Whittaker
B. Mendel
c. carl Linnaeus
D. Tippo
| 0 |
Biology
|
If the distance between the earth and
the Sun were half its present value, the number of days in a year would have
been
A . 64.5
в. 129
c. 182.5
D. 730
| 3 |
Physics
|
On an average, for every \( C O_{2} \) molecule
fixed by photosynthesis, how many molecules of oxygen are released?
A
B. 2
\( c \cdot 3 \)
D. 6
| 0 |
Biology
|
Why doesn't sea water freeze so easily?
| 1 |
Chemistry
|
Which one of waves tans our skin and
causes some substances to become
fluorescent?
A. infrared waves
B. ultraviolet waves
c. gamma rays
D. infrared and ultraviolet waves both
| 3 |
Physics
|
Draw a labelled diagram of an alternating current Generator. Determine the induced electromotive
force by the rotation of coil in it.
| 3 |
Physics
|
Which of the following is incorrectly matched?
Complex compound and number of
unpaired electrons
\( \mathbf{A} \cdot\left[F e F_{6}\right]^{3-}, 5 \)
B \( \cdot\left[C r(e n)_{3}\right]^{2}+, 2 \)
c. \( \left[\operatorname{Co}\left(N H_{3}\right)_{6}\right]^{3+}, 4 \)
D \( \cdot\left[M n\left(H_{2} O\right)_{6}\right]^{2+}, 5 \)
| 1 |
Chemistry
|
Addition of iron or zinc to copper sulfate causes precipitation of copper owing to
the
A . reduction of \( C u^{2} \)
B. oxidation of \( C u^{2} \)
c. hydrolysis of \( C u S O_{4} \)
D. ionisation of \( C u S O_{4} \)
| 1 |
Chemistry
|
Compound \( A \) when reacted with \( P C l_{5} \)
and then with ammonia gave \( \boldsymbol{B} . \boldsymbol{B} \)
when treated with bromine and caustic
potash produced \( C . C \) on treatment
with \( H C l \) and \( N a N O_{2} \) at \( 0^{\circ} C \) and then
on boiling produced ortho-cresol. Compound \( \boldsymbol{A} \) is :
A . \( o \) -Toluic acid
B. \( o \) -Chlorotoluene
c. \( o \) -Bromotoluene
D. m-Toluic acid
| 1 |
Chemistry
|
What is the name of the process of heat transfer using electromagnetic waves?
A. Conduction
B. Convection
c. Evaporation
D. Radiation
| 3 |
Physics
|
Where should the object be placed if we
use convex lens to obtain real, inverted and diminished image?
A. object should be placed at focal point
B. object should be placed at finite distance from Focal point
c. object should be placed at infinity
D. object should be placed between F and 2F
| 3 |
Physics
|
What is the difference between
distillation,distillation under reduced
pressure and steam distillation?
| 1 |
Chemistry
|
In the periodic table, vertical columns of elements are called \( \ldots . . \) and horizontal
rows of elements are called
A. Groups, periods
B. Periods, groups
c. Periods, periods
D. Groups, groups
| 1 |
Chemistry
|
Two mirrors are placed at right angles to each other as shown in the figure.
Total number of images of an object 0 placed between them, that are seen are:
A. Two
B. Three
c. Four
D. Six
| 3 |
Physics
|
If \( \lim _{x \rightarrow 1} \frac{x^{4}-1}{x-1}=\lim _{x \rightarrow k} \frac{x^{3}-k^{3}}{x^{2}-k^{2}}, \) then find
the value of \( k \)
\( A \cdot \frac{5}{3} \)
B. \( -\frac{8}{3} \)
\( c \cdot \frac{8}{3} \)
D. None of these
| 2 |
Maths
|
Which of the following has the highest acidic strength?
\( A \cdot \| \)
B. IV
\( c \)
\( D \)
| 1 |
Chemistry
|
Pb is a very important element of carbon family. It forms a number of compounds which are very useful in
industries. The process of removal of base metals \( (\mathrm{Cu}, \mathrm{Sn}, \mathrm{Bi}, \mathrm{As}) \) from lead is called:
A. softening process
B. liquation
c. parke's process
D. cupellalion
| 1 |
Chemistry
|
Chloroquine, camoquin and primaquine
are :
A. Anti malarial drug
B. Anti dengue drug
c. Anti tuberculosis drug
D. Both A and B
| 1 |
Chemistry
|
Divide the polynomial \( p(x) \) by the
polynomial \( p(g) \) and find the quotient
an in each of the following:
\( \boldsymbol{p}(\boldsymbol{x})=\boldsymbol{x}^{3}-\boldsymbol{3} \boldsymbol{x}^{2}+\boldsymbol{5} \boldsymbol{x}-\boldsymbol{3}, \boldsymbol{g}(\boldsymbol{x})= \)
\( x^{2}-2 \)
\( \boldsymbol{p}(\boldsymbol{x})=\boldsymbol{x}^{4}-\boldsymbol{3} \boldsymbol{x}^{2}+\boldsymbol{4} \boldsymbol{x}+\mathbf{5}, \boldsymbol{g}(\boldsymbol{x})= \)
\( \boldsymbol{x}^{2}+\mathbf{1}-\boldsymbol{x} \)
\( \boldsymbol{p}(\boldsymbol{x})=\boldsymbol{x}^{4}-\boldsymbol{5} \boldsymbol{x}+\boldsymbol{6}, \boldsymbol{g}(\boldsymbol{x})=\boldsymbol{2}-\boldsymbol{x}^{2} \)
| 2 |
Maths
|
Which of the following is a measurement of water pollution?
A . PSC
в. РСВ
\( c . \) во
D. coo
| 1 |
Chemistry
|
Assertion: The element carbon forms
the basic structural framework of more
compounds than any other element Reason: The carbon-carbon bond is
ionic.
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
E. Both Assertion and Reason are incorrect
| 1 |
Chemistry
|
An electric heater consists of a
nichrome coil and runs under \( 220 V \)
consuming \( 1 k W \) power. Part of its coil
burned out and it was reconnected after
cutting off the burnt portion, The power
it will consume now is:
A. More than \( 1 k W \)
B. Less that \( 1 k W \), but not zero
\( \mathrm{c} .1 \mathrm{kW} \)
D. \( 0 k W \)
| 3 |
Physics
|
Buna-S is a copolymer of:
A. styrene and 1,3 - butadiene
B. styrene and ethylene
3 - butadiene and ethylene
\( \mathbf{C} \cdot 1,3 \)
D. 1,3 - butadiene and acrylonitrile
| 1 |
Chemistry
|
If \( A \) is \( n \) squared matrix then \( A A^{\prime} \) and
\( A^{\prime} A \) are symmetric.
| 2 |
Maths
|
The relation among \( u, v \) and \( f \) for \( a \)
mirror is
\( \mathbf{A} \cdot f=u v /(u+v) \)
В \( . v=f u /(u+f) \)
\( \mathbf{c} . u=f v /(f+v) \)
D. All of these
| 3 |
Physics
|
toppr
Q Type your question
\( A \)
\( B \)
\( c \)
\( D \)
| 1 |
Chemistry
|
The first and second dissociation
constant of an acid \( \boldsymbol{H}_{2} \boldsymbol{A} \) are \( \mathbf{1 . 0} \times \)
\( \mathbf{1 0}^{-5} \) and \( \mathbf{5 . 0} \times \mathbf{1 0}^{-\mathbf{1 0}} \) respectively. The
over all dissociation constant of the
acid will be:
A. \( 5.0 \times 10^{-5} \)
В. \( 5.0 \times 10^{15} \)
c. \( 5.0 \times 10^{-15} \)
D. \( 0.2 \times 10^{5} \)
| 1 |
Chemistry
|
A cylindrical vessel of base radius \( \mathrm{R} \) and
height H has a narrow neck of height h and radius \( r \) at one end(see figure). The
vessel is filled with water(density \( \rho_{w} \) )
and its neck is filled with immiscible oil
(density \( \rho_{o} \) ). Then the pressure at:
A \( \cdot \) M is \( g\left(h \rho_{o}+H \rho_{w}\right) \)
B. \( \quad \) N is \( g\left(h \rho_{o}+H \rho_{w}\right) \frac{r^{2}}{R^{2}} \)
c. \( \mathrm{M} \) is \( g H \rho_{w} \)
D. \( \mathrm{N} \) is \( g \frac{\rho_{w} H R^{2}+\rho_{o} h r^{2}}{R^{2}+r^{2}} \)
| 3 |
Physics
|
The number \( \mathbf{P} \boldsymbol{\pi}-\mathbf{d} \boldsymbol{\pi} \) bondsin \( \mathbf{X} \mathbf{e} \mathbf{O}_{\mathbf{4}} \) is :
A. zero
B. Two
c. Three
D. Four
| 1 |
Chemistry
|
Lenz's law is a consequence of law of conservation of
A. momentum
в. energy
c. charge and mass
D. angular momentum
| 3 |
Physics
|
Define many-one function. Give an
example of function.
| 2 |
Maths
|
Which of the following is incorrect relation fot a perfect gas?
A. \( \quad\left(\frac{\delta U}{d V}\right)_{T}=0 \)
в. \( \quad\left(\frac{^{\frac{0}{0} H}{\delta P}}\right)_{T}=0 \)
\( \begin{array}{ll}\text { c. } & \left(\frac{\delta T}{\delta P}\right)_{H}=0\end{array} \)
D. \( \quad\left(\frac{\tilde{\sigma} U}{\delta T}\right)_{V}=0 \)
| 3 |
Physics
|
A rod of \( 10 \mathrm{cm} \) length is moving perpendicular to uniform magnetic field of intensity \( 5 \times 10^{-4} W b / m^{2} . \) If the
acceleration of the rod is \( 5 m / s^{2}, \) then the rate of increase of induced emf is
A \( .2 .5 \times 10^{-4} V s^{-1} \)
B . \( 25 \times 10^{-4} V s \)
c. \( 20 \times 10^{-4} V s \)
D. \( 20 \times 10^{-4} V s^{-1} \)
| 3 |
Physics
|
If \( \lim _{x \rightarrow \infty}\{(\sqrt{x^{4}+a x^{3}+3 x^{2}+b x+2}-\sqrt{a} \)
is finite, then the value of \( a \) is?
A . 3
B. 5
\( c \cdot 2 \)
D. Any real number
| 2 |
Maths
|
Match each coordination compound in List-I with an appropriate of characteristics from List-II. (en \( = \)
\( \boldsymbol{H}_{2} \boldsymbol{H} \boldsymbol{C} \boldsymbol{H}_{2} \boldsymbol{C} \boldsymbol{H}_{2} \boldsymbol{N} \boldsymbol{H}_{2} ; \) Atomic numbers:
\( \mathrm{Ti}=22, \mathrm{Cr}=24 ; \mathrm{Co}=27 ; \mathrm{Pt}=78) \)
List 1
Parama dexhil
\( A \)
4 \( \left[C r\left(N H_{3}\right)_{4} C l_{2}\right] C l \) and ionizatio
Diamag \( \operatorname{lex} \)
\( B \)
3 \( \left[T i\left(H_{2} O\right)_{3} C l\right]\left(N O_{3}\right)_{2} \)
2
and cis-trans
Parama \( \operatorname{exn} \)
\( c \)
\( \left[P t(e n)\left(N H_{3}\right) C l\right] N O_{3} \) 3 and cis-trans so ।
\( \left[C o\left(N H_{3}\right)_{4}\left(N O_{3}\right)_{2}\right] N O_{3} \) Diamagn
and exhib
ionizatior
isomerisr 4
| 1 |
Chemistry
|
The remainder when \( x^{3}-2 x^{2}+4 x \) is
divided by \( x^{2} \) is
A .
в. \( x-2+\frac{4}{x} \)
c. \( 4 x \)
D. \( 4 x-2 x^{2} \)
| 2 |
Maths
|
(a) Deduce an expression for the frequency of revolution of a charged particle in a magnetic field and show that it is independent of velocity or energy of the particle.
(b) Draw a schematic sketch of a
cylotron. Explain, giving the essential details of its construction, how it is used to accelerate the charged
particles.
| 3 |
Physics
|
What type of oxide would Ekaaluminium form?
A. \( E O_{3} \)
в. \( E_{3} O_{2} \)
\( \mathrm{c} \cdot E_{2} \mathrm{O}_{3} \)
D. \( E O \)
| 1 |
Chemistry
|
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