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Which of the following name is given to the hydrochloric acid by Lavoiser?
A. Mutaric acid
B. Glutaric acid
c. Tartaric acid
D. King of acids
| 1 |
Chemistry
|
A : The phase difference between any
two points on a wave front is zero
\( \mathrm{R}: \) From the source light, reaches every
point on the wave front in the same
time.
\( A . \) Both \( A \) and \( R \) are true, and \( R \) is correct explanation of \( A \)
B. Both A and R are true, and R is not correct explanation of \( A \)
C. A is true but R is false
D. A is false but R is true
| 3 |
Physics
|
The equation of line on which magnetic
field is zero due to system of two
perpendicular infinitely long current
carrying straight wires, is
A. \( x=y \)
B. \( x=2 y \)
c. \( x=3 y \)
D. \( 3 x=y \)
| 3 |
Physics
|
Identify the correct statement regarding
enzymes:
A. Enzymes are specific biological catalysts that can normally function at very high temperatures \( (T-1000 K) \)
B. Enzymes are normally heterogeneous catalysts that are very specific in their action.
C. Enzymes are specific biological catalysts that cannot be poisoned
D. Enzymes are specific biological catalysts that possess well defined active sites.
| 1 |
Chemistry
|
Calculate Moment of force \( F_{2} \) about \( O \)
A. \( 10 N m \) (clockwise)
B. \( 10 N \) m (anti clockwise)
c. \( 12 N m \) (clockwise).
D. \( 12 N m \) (anti clockwise)
| 3 |
Physics
|
Which was the first antibacterial
discovered by Paul Ehrlich?
A. Salvarsan
B. Syphilis
c. codeine
D. None of these
| 1 |
Chemistry
|
Molten iron from the blast furnace
contains impurities.
The process of turning the impure iron into steel involves blowing oxygen into
the molten iron and
adding calcium oxide. What are the reasons for blowing in oxygen and adding calcium oxide?
A. Carbon is removed by reaction with oxygen, reacts with acidic impurities making slag
B. Carbon is removed by reacting with oxygen, reacts with slag and so removes it
C. Iron reacts with the oxygen, reacts with acidic impurities making slag
D. Iron reacts with the oxygen, reacts with slag and so removes it
| 1 |
Chemistry
|
Triradiate vascular bundles can be
traced in
A. Monocot root
B. Dicot root
c. Monocot stem
D. Dicot stem
| 0 |
Biology
|
sliding along its length on a horizontal
table whose top is partly smooth and
rest roughly with friction coefficient \( \mu . \) If
the rod after moving through the
smooth part enters the rough with
velocity \( \boldsymbol{v}_{\mathbf{0}} \)
(i) What will be the magnitude of the
friction force when its \( x \) length \( (<L) \)
lies in the rough part during sliding.
(ii) Determine the minimum velocity \( \boldsymbol{v}_{\mathbf{0}} \)
with which it must enter so that it lies
completely in a rough region before
coming to rest.
(iii) If the velocity is double the minimum velocity as calculated in part
(a) then what distance does its front
end \( A \) would have travelled in a rough region before rod comes to rest.
| 3 |
Physics
|
Which of the following statement gives the correct explanation of the fact
that solubility of alkali metal fluorides increases down the group?
A. Hydration energy increases and lattice energy decreases down the group
B. Both energy decrease down the group but decrease in hydration energy is rapid.
c. Both energy decrease down the group but decrease in lattice energy is more
D. Both energy increase down the group but increase in hydration energy is rapid.
| 1 |
Chemistry
|
Assertion
Increase in pressure does not cause a shift in equilibrium for the formation of
\( \boldsymbol{H} \boldsymbol{I} \)
Reason
Formation of \( H I \) is an exothermic
reaction.
A. If both assertion and reason are correct and reason is the correct explaination of the assertion.
B. If both assertion and reason are correct, but reason is not the correct explanation of the assertion
c. If assertion is correct, but reason is incorrect
D. If assertion is incorrect, but reason is correct
| 1 |
Chemistry
|
State true or false:
In a trapezium \( A B C D \) in which \( A B \) is
parallel to \( D C \) and \( A D=B C \), then
\( \angle A D C=\angle B C D \)
A. True
B. False
| 2 |
Maths
|
According to Bohr's model of hydrogen atom, relation between principal quantum number n and radius of stable orbit is
\( \mathbf{A} \cdot r \propto \frac{1}{n} \)
B . \( r \propto n \)
\( c \cdot r \propto \frac{1}{n^{2}} \)
D \( \cdot r \propto n^{2} \)
| 3 |
Physics
|
A farmer divided his aquare - shaped
land into three parts, as shown.he gave
two parts to mukesh and the third part to naresh. how much land did each get?
| 2 |
Maths
|
Mass of Jupiter is ............ times that of
Earth
A . 318
B. 195
\( c \cdot 95 \)
D. 0.8
| 3 |
Physics
|
Aman sold an article to Ramesh at a
loss of \( 6 \% \). Ramesh sold it to Manish at
a gain of \( 4 \% \). If Aman's original price
was \( 252.50, \) what was Manish's CP?
| 2 |
Maths
|
Which of the following represents the electronic configuration of d-block
elements?
A \( \cdot(n-1) s^{2} n d^{1-10} \)
B . \( (n-1) d^{1-10} n s^{1-2} \)
C \( \cdot(n-1) s^{2} p^{6} n s^{1} \)
D. \( n s^{2} p^{2} d^{1} \)
| 1 |
Chemistry
|
\( \boldsymbol{S} \boldsymbol{c}^{\boldsymbol{3}+} \) is colorless.
If the given statement is true enter 1
else enter 0
| 1 |
Chemistry
|
Charge can neither be \( \ldots \) nor
A. Created, Destroyed
B. Positive, Negative
c. Negative, Positive
D. None of the above
| 3 |
Physics
|
Find the smallest number by which 135
must be divided, so that the quotient is
a perfect cube
A . 3
B. 5
\( c .9 \)
D. 15
| 2 |
Maths
|
\( \left|\begin{array}{ccc}\mathbf{1} & \boldsymbol{a} & \boldsymbol{a}^{2}-\boldsymbol{b} \boldsymbol{c} \\ \mathbf{1} & \boldsymbol{b} & \boldsymbol{b}^{2}-\boldsymbol{c} \boldsymbol{a} \\ \mathbf{1} & \boldsymbol{c} & \boldsymbol{c}^{2}-\boldsymbol{a} \boldsymbol{b}\end{array}\right|=? \)
\( \mathbf{A} \cdot \mathbf{5} \)
B. abc
\( c \cdot 1 \)
\( D \)
| 2 |
Maths
|
Solve:
\( \left(\sqrt{3}+\tan 1^{0}\right) \)
| 2 |
Maths
|
Evaluate the definite integral \( \int_{0}^{\frac{\pi}{2}} \cos 2 x d x \)
| 2 |
Maths
|
If \( \boldsymbol{f}(\boldsymbol{x})=\left[\mathbf{9}^{x}-\mathbf{3}^{x}+\mathbf{1}\right], \boldsymbol{x} \in(-\infty, \mathbf{1}) \)
then number of integers in the range of
\( f(x) \) is (where [.] denotes greatest integer function)
| 2 |
Maths
|
On reaction with chlorine in sunlight, sulphur dioxide gives:
A. addition reaction
B. displacement reaction
c. substitution reaction
D. all of these
| 1 |
Chemistry
|
What is diazotisation?
| 1 |
Chemistry
|
\( \mathbf{A} \)
is a region around a magnet where magnetic lines of force
act.
| 3 |
Physics
|
\( \boldsymbol{C H}_{3}-\boldsymbol{C H}_{2}-\boldsymbol{C l} \stackrel{\text {alc.KOH}}{\longrightarrow} \)
\( \frac{B r_{2} / C C l_{4}}{Z n / a l c o h o l i c} C \)
\( C \) is:
A. acetylene
B. ethylene
c. ethane
D. methane
| 1 |
Chemistry
|
The area of regular hexagon if its side is
\( 4 c m \)
A \( .24 \sqrt{3} \)
B. \( 4 \sqrt{3} \)
\( c \cdot 5 \sqrt{3} \)
D. \( 2 \sqrt{3} \)
| 2 |
Maths
|
A radioactive substance \( X \) decays into
another radioactive substance \( Y \)
Initially only \( X \) was present, \( \lambda x \) and \( \lambda y \)
are the disintegration constants of \( \boldsymbol{X} \)
and \( Y . N_{x} \) and \( N_{y} \) are the number of
nuclei of \( X \) and \( Y \) at any time \( t \)
Number of nuclei \( N_{y} \) will be maximum
when
A \( \cdot \frac{N_{y}}{N_{x}-N_{y}}=\frac{\lambda_{y}}{\lambda_{x}-\lambda_{y}} \)
В. \( \frac{N_{x}}{N_{x}-N_{y}}=\frac{\lambda_{x}}{\lambda_{x}-\lambda_{y}} \)
\( c \cdot \frac{\lambda_{y}}{N_{y}}=\frac{\lambda_{x}}{N_{x}} \)
\( \mathbf{D} \cdot \lambda_{y} N_{y}=\lambda_{x} N_{x} \)
| 3 |
Physics
|
If \( \boldsymbol{D}_{\boldsymbol{r}}=\left|\begin{array}{ccc}\boldsymbol{r} & \boldsymbol{x} & \frac{\boldsymbol{n}(\boldsymbol{n}+\mathbf{1})}{\mathbf{2}} \mid \\ \boldsymbol{2 r}-\boldsymbol{1} & \boldsymbol{y} & \boldsymbol{n}^{2} \\ \boldsymbol{3 r}-\boldsymbol{2} & \boldsymbol{z} & \frac{\boldsymbol{n}(\boldsymbol{3} \boldsymbol{n}-\mathbf{1})}{\mathbf{2}}\end{array}\right|, \) then
\( \sum_{r=1}^{n} D_{r} \) is equal to
A \( \cdot \frac{1}{6} n(n+1)(2 n+1) \)
B. \( \frac{1}{4} n^{2}(n+1)^{2} \)
\( c \cdot 0 \)
D. none of these
| 2 |
Maths
|
A semicircular wire of radius \( \boldsymbol{R} \) is
rotated with constant angular velocity about an axis passing through one end and perpendicular to the plane of the wire. There is a uniform magnetic field
of strength \( B \). The induced emf between
the ends is
\( \mathbf{A} \cdot B \omega R^{2} / 2 \)
в. \( 2 B \omega R^{2} \)
C. is variable
D. none of these
| 3 |
Physics
|
An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be
A . a primary amine
B. a secondary amine
c. a tertiary amine
D. All of the above
| 1 |
Chemistry
|
Equal volumes of two immiscible
liquids of densities \( \rho \) and \( 2 \rho \) are filled in
a vessel as shown in figure. Two small holes are punched at depth h/2 and 3h/2 from the surface of lighter liquid. If
\( V_{1} \) and \( V_{2} \) are the velocities of a flux at
these two holes, then \( V_{1} / V_{2} \) is :
\( A \)
B. \( \frac{1}{2} \)
\( c \cdot 1 \)
\( \overline{4} \)
D. \( \frac{1}{\sqrt{2}} \)
| 3 |
Physics
|
What is the average translational kinetic energy of a molecule of an ideal
gas at temperature of \( 27^{\circ} \mathrm{C} \)
| 3 |
Physics
|
An electron and a proton have the same De Broglie wavelength. Then the kinetic energy of the electron is:
A. zero
B. Infinity
c. Equal kinetic energy of proton
D. Greater than the kinetic energy of proton
| 3 |
Physics
|
If \( \bar{a}=4 \bar{i}+6 \bar{j} \) and \( \bar{b}=3 \bar{j}+4 \bar{k}, \) then the
vector form of the component of \( \bar{a} \) along \( \bar{b} \) is
A \( \cdot \frac{18(3 \bar{j}+4 \bar{k})}{10 \sqrt{3}} \)
B. \( \frac{18(3 \bar{j}+4 \bar{k})}{25} \)
c. \( \frac{18(3 \bar{j}+4 \bar{k})}{\sqrt{13}} \)
D. \( \frac{(3 \bar{j}+4 \bar{k})}{25} \)
| 2 |
Maths
|
Consider the following statements about electroplating:
I. Electroplating is the coating of metal objects with a thin layer of a different
metal.
II. Electroplating makes objects look more attractive and protects them from corrosion and rusting.
III. Electroplating forms and envelops around the object to protect them from magnetism. Which of the above statements is true?
A. Only statement I
c. Statements land II
D. Statements II and III
E. All of the above statements
| 3 |
Physics
|
Two coils \( A \) and \( B \) have mutual
inductance \( 2 \times 10^{-2} \) henry. If the
current in the primary is \( i= \)
\( 5 \sin (10 \pi t) \) then the maximum value of
e.m.f. induced in coil \( B \) is
\( \mathbf{A} \cdot \pi \) volt
в. \( \frac{\pi}{2} \) volt
c. \( \frac{\pi}{3} \) volt
D. \( \frac{\pi}{4} \) volt
| 3 |
Physics
|
The chemical properties of the elements of matter have been found to repeat is regular patterns. This pattern can be
seen in the arrangement of atoms in the:
A. nutrition table
B. calculus table
c. periodic table
D. chemical table
| 1 |
Chemistry
|
\( \mathrm{Zn}(30): 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10} 4 s^{2} \)
How to find valency of zinc by electronic configuration?
| 1 |
Chemistry
|
There are six plates of equal are \( A \) and
separation between the plates is
\( d(d<<A) \) are arranged as shown in
figure. The equivalent capacitance between points 2 and \( 5, \) is \( \alpha \frac{\varepsilon_{0} A}{d} . \) Then
find the value of \( \boldsymbol{\alpha} \)
| 3 |
Physics
|
In absence of friction
A. our shoes will remain intact
B. we will not be able to walk
C. we will be able to slide smoothly
D. all the above will happen
| 3 |
Physics
|
Soft soaps are:
A. sodium salts of fatty acids
B. potassium salts of fatty acids, containing excess of free alkali
C. potassium salts of fatty acids, containing no free alkali
D. calcium salts of fatty acids
| 1 |
Chemistry
|
The AP whose first term is 10 and
common difference is 3 is
B. \( 5,7,9,11, \ldots \)
c. \( 8,12,16,20, \dots \)
D. All the above
| 2 |
Maths
|
The first step in the hydrometallurgical
process is
A. Filteration
B. Electrolysis
c. Reduction
D. Leaching
| 1 |
Chemistry
|
Which of the following forms a white precipitate when added to a solution of
NaCl?
A \( \cdot N_{2} \)
в. \( K I \)
c. \( C C l_{4} \)
D. \( A g N O_{3} \)
ह. \( C a C O_{3} \)
| 1 |
Chemistry
|
\( 6.24 g \) of ethanol are vaporized by
supplying \( 5.89 k j \) of heat energy. What is enthalpy of vaporisation of ethanol?
| 1 |
Chemistry
|
A black and a red die are rolled together. Find the conditional probability of
obtaining the sum 8 , given that the red die resulted in a number less than 4
| 2 |
Maths
|
Assertion
Every vibrating body is a source of
Sound
Reason
All sounds are audible
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
| 3 |
Physics
|
Polymer used in bullet proof glass is:
A. Iexan
в. РММА
c. nomex
D. kevlar
| 1 |
Chemistry
|
Rainbow is formed due to which of the
following?
A. By dispersion of sunlight through water droplets present in the atmosphere
B. By scattering of sunlight through water droplets present in the atmosphere
C. By reflection of sunlight through water droplets present in the atmosphere
D. None of the above
| 3 |
Physics
|
Which of the given element will form a
covalent compound with \( \boldsymbol{O}: \boldsymbol{K} \boldsymbol{o} \boldsymbol{r} \boldsymbol{N} \)
A . \( N \)
в. \( K \)
c. Both
D. No one
| 1 |
Chemistry
|
The initial velocity of a particle is \( u(\mathrm{at} \)
\( t=0 \) ) and the acceleration a is given by
\( \alpha t^{3 / 2} . \) Which of the following relations is valid?
A \( \cdot v=u+\alpha t^{3 / 2} \)
B. \( v=u+\frac{3 \alpha t^{3}}{2} \)
c. \( v=u+\frac{2}{5} \alpha t^{5 / 2} \)
D. \( v=u+\alpha t^{5 / 2} \)
| 3 |
Physics
|
If a manjumps out from a boat, the boat moves backward. Explain.
| 3 |
Physics
|
If \( \frac{\mathbf{3} \boldsymbol{x}+\boldsymbol{a}}{\boldsymbol{x}^{2}+\mathbf{3} \boldsymbol{x}+\mathbf{2}}=\frac{\boldsymbol{A}}{\boldsymbol{x}-\mathbf{2}}-\frac{\mathbf{1 0}}{\boldsymbol{x}-\mathbf{1}}, \) then
\( \boldsymbol{a}=\ldots \) and \( \boldsymbol{A}=\ldots \)
A \( \cdot a=7, A=13 \)
3
В. \( a=11, A=13 \)
c. \( a=13, A=7 \)
| 2 |
Maths
|
The structure given below is known as:
where \( \mathbf{R}=\langle\square\rangle-\mathrm{CH}_{2}-\mathrm{I}-\mathrm{NH}- \)
A. penicillin F
B. penicillin G
c. penicillin
D. ampicillin
| 1 |
Chemistry
|
Which among the following genus of the bryophyte have ecological value?
A. Funaria
B. Riccia
c. sphagnum
D. Anthoceros
| 0 |
Biology
|
If \( k \) is a scalar and \( A \) is an \( n \times n \) square
matrix, then \( |\boldsymbol{k} \boldsymbol{A}|= \)
A \( \cdot k|A|^{n} \)
в. \( k|A| \)
c \( \cdot k^{n}\left|A^{n}\right| \)
D \( \cdot k^{n}|A| \)
| 2 |
Maths
|
Count total number of significant figures in 3500
\( \mathbf{A} \cdot \mathbf{1} \)
B. 2
\( c \cdot 3 \)
\( D \)
| 3 |
Physics
|
Exactly one right?
\( A \cdot \frac{2}{5} \)
B. \( \frac{2}{3} \)
\( c \cdot \frac{3}{5} \)
D.
| 2 |
Maths
|
In case of theory of light nature of light
match the following:
List - I List - II
a) Light is a collection of
e) Newton's theory photons
b) Light is a form of
f) Huygen's theory electromagnetic wave
g) Maxwell's
c) Light is a wave
d) Light is a stream of
h) Max planck's corpuscles theory
\( \mathbf{A} \cdot \mathrm{a}-\mathrm{h} ; \mathrm{b}-\mathrm{g} ; \mathrm{c}-\mathrm{f} ; \mathrm{d}-\mathrm{e} \)
B. \( a-e ; b-f ; c-g ; d-h \)
C. \( a-g ; b-h ; c-g ; d-f \)
D. \( a-h ; b-g ; c-e ; d-f \)
| 3 |
Physics
|
Identify the action that can cause motion of a book placed on a table.
A. Pulling
B. Pushing
c. Lifting
D. All of the above
| 3 |
Physics
|
Using vector method, find the incentre
of the triangle whose vertices are \( P(0,4,0), Q(0,0,3) \) and \( R(0,4,3) \)
| 2 |
Maths
|
If the pressure in a closed vessel is
reduced by drawing out some gas, the mean-free path of molecules:
A. is decreased
B. is increased
c. remains unchanged
D. increases or decreases according to the nature of the gas
| 3 |
Physics
|
Solve:
\( 16 a^{3}-\frac{128}{b^{3}} \)
| 2 |
Maths
|
What is the molecular formula of
Magnesium Pyrophosphate formed during Carius method for estimation of
phosphorous in organic compound?
A. \( M g_{2} P_{2} O_{7} \)
в. \( M g_{2} P_{2} O_{5} \)
\( \mathrm{c} \cdot M g_{2} P O_{4} \)
D. \( M g P_{2} O_{5} \)
| 1 |
Chemistry
|
Find the first four terms of an \( A P \) whose
first term is \( 3 x+y \) and common
Difference is \( \boldsymbol{x}-\boldsymbol{y} \)
| 2 |
Maths
|
Describe the construction and working
of Van de graff generator making the labelled diagram.
| 3 |
Physics
|
A following mechanism has been proposed for a reaction:
\( \mathbf{2} \boldsymbol{A}+\boldsymbol{B} \rightarrow \boldsymbol{D}+\boldsymbol{E} \)
\( \boldsymbol{A}+\boldsymbol{B} \rightarrow \boldsymbol{C}+\boldsymbol{D} \quad(\text { slow }) \)
\( \boldsymbol{A}+\boldsymbol{C} \rightarrow \boldsymbol{E} \quad(\text { fast }) \)
The rate law expression for the reaction
is:
\( \mathbf{A} \cdot \mathbf{r}=k[A]^{2}[B] \)
B. \( r=k[ \) A][B]
\( \mathbf{C} \cdot r=k[A]^{2} \)
D. \( r=k[A][C] \)
| 1 |
Chemistry
|
What is the correct order of thermal
stability of carbonates of alkaline earth metals?
A \( \cdot B e C O_{3}>M g C O_{3}>C a C O_{3}>S r C O_{3}>B a C O_{3} \)
в. \( B e C O_{3}<M g C O_{3}<C a C O_{3}<S r C O_{3}<B a C O_{3} \)
c. \( B e C O_{3}<M g C O_{3}>C a C O_{3}>S r C O_{3}<B a C O_{3} \)
D. \( B e C O_{3}>M g C O_{3}<C a C O_{3}<S r C O_{3}<B a C O_{3} \)
| 1 |
Chemistry
|
Which of the following is not a balanced
equation?
A \( \cdot C a(O H)_{2}+C O_{2} \rightarrow C a C O_{3}+H_{2} O \)
в. \( F e+C u S O_{4} \rightarrow F e S O_{4}+C u \)
c. \( K C l O_{4} \stackrel{\Delta}{\longrightarrow} K C l+2 O_{2} \)
D. \( C u+2 H N O_{3} \rightarrow C u\left(N O_{3}\right)_{2}+2 N O_{2}+H_{2} O \)
| 1 |
Chemistry
|
What are the products obtained upon the ozonolysis of 2 -pentene? This question has multiple correct options
A. \( C H_{3} C H_{2} C H O \)
в. \( C H_{3} C H O \)
c. \( C H_{3} \) COCH\( _{3} \)
D. \( C H_{3} C O C H_{2} C H_{3} \)
| 1 |
Chemistry
|
A table fan, rotating at a speed of 2400
rpm is switched off and the resulting
variation of the rpm with time is shown
in the figure. The total number of revolutions of the fan before it comes to
rest is:
A. 420
B. 280
\( c \cdot 480 \)
D. 380
| 3 |
Physics
|
If \( \boldsymbol{x}=\boldsymbol{y}(\log \boldsymbol{x} \boldsymbol{y}) \) then find \( \frac{\boldsymbol{d} \boldsymbol{y}}{\boldsymbol{d} \boldsymbol{x}} \)
| 2 |
Maths
|
In a series \( L C R \) circuit, the voltage across the resistance, capacitance and
inductance is \( 10 V \) each. If the
capacitance is short circuited, the voltage across the inductance will be :
A. \( 10 V \)
B. \( \frac{10}{\sqrt{2}} V \)
c. \( \frac{10}{3} V \)
D. 20 \( V \)
| 3 |
Physics
|
A straight conductor of uniform cross-
section carries a current, \( I \). If \( ^{\prime} s^{\prime} \) is the
specific charge of an electron, the momentum of all the free electrons per unit length of the conductor, due to their drift velocity only, is
A . Is
в. \( \sqrt{\frac{I}{s}} \)
c. \( \frac{1}{s} \)
\( \left(\frac{I}{s}\right)^{2} \)
| 3 |
Physics
|
A metal ball \( B_{1} \) (density \( 3.2 \mathrm{g} \mathrm{cm}^{-3} \) ) is dropped in water while another metal
ball \( B_{2} \) (density \( 6.0 \mathrm{g} \mathrm{cm}^{-3} \) ) is dropped
in a liquid of density \( 1.6 \mathrm{g} \mathrm{cm}^{-3} \). If both the balls have the same diameter and
attain the same terminal velocity, the ratio of viscosity of water to that of the liquid is:
A . 2.
B. 0.5
\( c \cdot 4.0 \)
D. indeterminate due to insufficient data
| 3 |
Physics
|
Total number of products in the given reaction: (excluding steroisomers) \( \boldsymbol{C}_{6} \boldsymbol{H}_{5} \boldsymbol{C H} \boldsymbol{O}+\boldsymbol{C H}_{3}-\boldsymbol{C H O} \frac{\boldsymbol{\Delta}}{_{\boldsymbol{O} \boldsymbol{H}}} \)
product will be:
A. one
B. two
c. three
D. four
| 1 |
Chemistry
|
0.1 mole of \( N_{2} O_{4}(g) \) was sealed in a
tube under one atmosphere conditions
at \( 25^{\circ} \mathrm{C} \). Calculate the number of moles
of \( N O_{2}(g) \) present, if the equilibrium
\( N_{2} O_{4}(g) \rightleftharpoons 2 N O_{2}(g)\left(K_{p}=0.14\right) \) is
reached after some time :-
A \( .1 .8 \times 10^{2} \)
B . \( 2.8 \times 10^{2} \)
c. 0.037
D. \( 2.8 \times 10^{-2} \)
| 1 |
Chemistry
|
The equilibrium constant for the
reaction, \( \boldsymbol{S n}(\boldsymbol{s})+\boldsymbol{2} \boldsymbol{H}^{+} \rightarrow \boldsymbol{S} \boldsymbol{n}^{2+}+ \)
\( \boldsymbol{H}_{2}(\boldsymbol{g}) \boldsymbol{a} \boldsymbol{t} \boldsymbol{2} \boldsymbol{5}^{\circ} \boldsymbol{C} \) is:
\( \boldsymbol{E}^{\circ}\left(\boldsymbol{S} \boldsymbol{n}^{2+} \mid \boldsymbol{S} \boldsymbol{n}\right)=\mathbf{0 . 1 4} \)
A \( .5 .5 \times 10^{4} \)
B. \( 2.3 \times 10^{2} \)
c. \( 1.1 \times 10^{2} \)
D. 1.009
| 1 |
Chemistry
|
(1) 1,2 -dihydroxybenzene \( (\|) 1,3- \) dihydroxybenzene (III) \( 1,4^{-} \) dihydroxybenzene (IV) Hydroxybenzene The increasing order of boiling points of above-mentioned alcohols is:
A. \( I<I I<I I I<I V \)
в. \( I<I I<I V<I I I \)
c. \( I V<I<I I<I I I \)
D. \( I V<I I<I<I I I \)
| 1 |
Chemistry
|
Which of the following is false?
This question has multiple correct options
\( \mathbf{A} \cdot C r^{2+}(g) \) ion has greater magnetic moment compared to \( C o^{3+}(g) \)
B. The magnitude of ionization potential of iron an-ion (monoanion) would be equal to electron gain enthalpy of iron.
C. Lanthanoids contraction is cause of lower I.P of \( P b \)
than \( S n \)
D. If successive ionization energy are \( 332,738,849,4080,4958 \text { (in } k J / m o l) \). Then this element can be of 15 th group.
| 1 |
Chemistry
|
Let \( n_{p} \) and \( n_{e} \) be the number of holes
and conduction electrons in an
extrinsic semiconductor. Then
A \( \cdot n_{p}>n_{e} \)
в. \( n_{p}=n_{e} \)
c. \( n_{p}<n_{e} \)
D \( \cdot n_{p} \neq n_{e} \)
| 3 |
Physics
|
In a metre bridge experiment null point is obtained at \( 40 \mathrm{cm} \) form one end of the
wire when resistance \( X \) is balanced
against another resistance Y. If \( \mathrm{X}<\mathrm{Y} \) then the new position of the null point from the same end, if one decides to
balance a resistance of \( 3 \mathrm{X} \) against \( \mathrm{Y} \) will be close to
\( \mathbf{A} \cdot 80 \mathrm{cm} \)
B. \( 75 \mathrm{cm} \)
\( c \cdot 67 \mathrm{cm} \)
D. \( 50 \mathrm{cm} \)
| 3 |
Physics
|
Suffix for sub species is
A. Phytina
B. Oideae
c. Ineae
D. None of the above
| 0 |
Biology
|
If \( x^{y}=y^{x} \) and \( x=2 y, \) then find the
value of \( x+y . \) (Assume that \( y \neq 0 \) )
| 2 |
Maths
|
When light rays enter the eye, most of the refraction occurs at the:
A. crystalline lens.
B. outer surface of the cornea
c. iris
D. pupil.
| 3 |
Physics
|
Find the principal value of:
\( \operatorname{cosec}^{-1}\left(2 \cos \frac{2 \pi}{3}\right) \)
| 2 |
Maths
|
In Coulomb's law, the constant of
proportionality K has the units
\( N m^{2} / C^{2} \) then the magnitude of \( \mathrm{K} \) in air
is :
A \( 9 \times 10^{5} \)
\( ^{5} \)
B. \( 9 \times 10^{9} \)
\( \mathrm{c} \cdot 9 \times 10^{3} \)
D. none of these
| 3 |
Physics
|
Which of the following are in inverse
proportion?
(i) The number of workers on a job and
the time to complete the job.
(ii) The time taken for a journey and the distance travelled in a uniform speed.
(iii) Area of cultivated land and the crop
harvested.
(iv) The time taken for a fixed journey and the speed of the vehicle.
(v) The population of a country and the area of land per person.
| 2 |
Maths
|
What is the electron configuration for
manganese?
A \( \cdot 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5} \)
B . \( [A r] 4 s^{1} \)
C \( \cdot 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5} \)
D. \( 1 s^{2} 2 s^{2} 2 p^{1} \)
| 1 |
Chemistry
|
The heaviest subatomic particle is :
A. neutron
B. positron
C . electron
D. proton
| 1 |
Chemistry
|
The wavelengths for the light of red and blue colours are roughly \( 7.8 \times 10^{-7} m \)
and \( 4.8 \times 10^{-7} m \) respectively. Which
colour has the greater speed in glass?
A. Red light
B. Violet light
c. Yellow light
D. All colors have same speed
| 3 |
Physics
|
Which of the following complex is useful in the dehydrogenation of alkanes?
\( \mathbf{A} \cdot\left[\left(P h_{3} P\right) R h C l\right. \)
B. \( \left[\left(P h_{3} P\right)_{3} R h_{2} C l\right. \)
\( \mathbf{c} \cdot\left[\left(P h_{3} P\right)_{3} R h C l\right] \)
D. \( \left[\left(P h_{3} P\right)_{3} R h C l_{2}\right] \)
| 1 |
Chemistry
|
The type of sex determination in honey
bee is
A. Diploidy
B. Haplo-diploidy
c. zz - zw
D. Haploidy
| 0 |
Biology
|
Zwitter ion can be formed by:
A . acetanilide
B. benzanilide
c. sulphanilic acid
D. benzene sulphonamide
| 1 |
Chemistry
|
The correct IUPAC name of the following compound is
\( \left[\boldsymbol{C r}\left(\boldsymbol{N} \boldsymbol{H}_{3}\right)_{5}(\boldsymbol{N} \boldsymbol{C S})\right]\left[\boldsymbol{Z n C l}_{4}\right] \)
A. pentaammine isothiocyanato chromium(III) tetrachlorozincate(II)
B. pentammine isothiocyanate zinc chloridechromate(III)
c. pentaammine isothiocyanato chromate(II)
D. isothiocyanato pentaammine chromium(II) zinc chloride(IV).
| 1 |
Chemistry
|
The equation of the transverse wave travelling in a rope is given by \( \mathbf{y}= \) \( 5 \sin (4 t-0.02 x) \) where \( y \) and \( x \) are in
meters and \( t \) is in seconds. Calculate
the intensity of the wave if the density
of rope material is \( 1250 \mathrm{kg} / \mathrm{m}^{3} \)
A. \( 2000 \mathrm{kJm}^{-2} \mathrm{s}^{-1} \)
B. \( 10 \mathrm{kJm}^{-2} \mathrm{s}^{-1} \)
c. \( 40 \mathrm{kJm}^{-2} \mathrm{s}^{-1} \)
D. 3 \( k J m^{-2} s^{-1} \)
| 3 |
Physics
|
Which of the following expressions for \( \% \) ionization of a monoacidic base
\( (B O H) \) in aqueous solution is not correct at appreciable concentration?
A \( \cdot_{100} \times \sqrt{\frac{K_{b}}{c}} \)
В. \( \frac{1}{1+10\left(p K_{b}-p O H\right)} \)
с. \( \frac{K_{w}\left[H^{+}\right]}{K_{b}+K_{w}} \)
D. \( \frac{K_{b}}{K_{b}+\left[O H^{-}\right]} \)
| 1 |
Chemistry
|
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