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When an electron falls from a higher
energy a lower energy level, the difference in the energies appears in the from of electromagnetic radiation Why cannot it be emitted as other forms
of energy? | 3 | Physics |
The solubility of \( C a F_{2}(K=3.4 \times \)
\( \mathbf{1 0}^{-11} \) ) in \( 0.1 M \) solution of \( N a F \) would
be:
A \( \cdot 3.4 \times 10^{-12} M \)
В. \( 3.4 \times 10^{-10} M \)
c. \( 3.4 \times 10^{-9} M \)
D. \( 3.4 \times 10^{-13} M \) | 1 | Chemistry |
Longest plant cells are
A. vessels
B. Trachieds
c. cotton fiber
D. Fibres of Ramie | 0 | Biology |
In a potentiometer wire experiment, the
emf of a battery in the primary circuit is \( 20 V \) and its internal resistance is \( 5 \Omega \)
There is a resistance box in series with
the battery and the potentiometer wire, whose resistance can be varied from
\( 120 \Omega \) to \( 170 \Omega \). Resistance of the
potentiometer wire is \( 75 \Omega \). The following potential differences can be measured using this potentiometer This question has multiple correct options
\( \mathbf{A} \cdot 5 V \)
B. \( 6 V \)
c. \( 7 V \)
D. \( 8 V \) | 3 | Physics |
What are the forces imparted by
atmosphere on the walls of a room of
dimension \( 6 m \times 5 m \times 4 m ?(1 \mathrm{Atm} .= \)
\( \mathbf{1 0}^{\mathbf{5}} \boldsymbol{N} / \boldsymbol{m}^{\mathbf{2}} \mathbf{)} \)
\( \mathbf{A} \cdot 7 \times 10^{6} N \)
B \( \cdot 2 \times 10^{7} N \)
C \( .2 \times 10^{8} N \)
D. \( 2 \times 10^{6} N \) | 3 | Physics |
A battery of emf \( 15 \mathrm{V} \) and internal resistance of \( 4 \Omega \) is connected to a
resistor. If the current in the circuit is 2
A and the circuit is closed. Resistance
of the resistor and terminal voltage of the battery will be.
A \( .2 .5 \Omega, 6 \vee \)
B. \( 3.5 \Omega, 6 v \)
c. \( 2.5 \Omega, 7 v \)
D. \( 3.5 \Omega, 7 \vee \) | 3 | Physics |
Of the following, the most recent ancestors of vascular plants were probably
A. Mosses
B. Red algae
c. Horsetails
D. Green algae | 0 | Biology |
Thermal conductivity of standard SWNT along its length is Watt/m.K.
A . 3500
B. 35,000
c. 350
D. 3600 | 3 | Physics |
To make an n-type semiconductor, an
intrinsic semiconductor is doped with
A. gallium
B. indium
c. boron
D. arsenic | 3 | Physics |
The four wires from a larger circuit
intersect at junction A a shown. What is
the magnitude and direction of the
current between points \( A \) and \( B ? \)
A. 2 A from \( A \) to \( B \)
B. 2 A from \( B \) to \( A \)
C. 3 A from A to B
D. 3 A from B to A | 3 | Physics |
In an experiment, the refractive index of glass was observed to be
\( \mathbf{1 . 4 5}, \mathbf{1 . 5 6}, \mathbf{1 . 5 4}, \mathbf{1 . 4 4}, \mathbf{1 . 5 4}, \mathbf{1 . 4 4}, \mathbf{1 . 5 4} \)
and \( 1.53 . \) Calculate mean value of refractive index | 3 | Physics |
Which of the following belongs to the actinide series of elements?
A .
B. Ta
c.
D. Lu | 1 | Chemistry |
Which one moves with greatest speed:
A . \( \alpha \) -rays
B. \( \beta \) -rays
c. \( \gamma \) -rays
D. cathode rays | 3 | Physics |
Q Type your question
1vace, ivabr and 1 vat
(A) The concentration of \( A g^{+} \) required to initiate precipitation of each of \( A g I, A g B r \) and \( A g C l \) are \( 1.5 \times 10^{-13} \)
\( 3.3 \times 10^{-10} \) and \( 1.6 \times 10^{-7} \)
respectively.
(B) The percentage of \( I^{-} \) precipitated before \( A g B r \) precipitates is \( 99.95 \% \)
(C) The percentage of \( I^{-} \) precipitated
before \( C l^{-} \) precipitates is \( 99.999917 \% \)
Given that;
\( \left(\boldsymbol{K}_{s p}(\boldsymbol{A} \boldsymbol{g} \boldsymbol{I})=\mathbf{1 . 5} \times \mathbf{1 0}^{-\mathbf{1 6}}\right. \)
\( \boldsymbol{K}_{s p}(\boldsymbol{A} \boldsymbol{g} \boldsymbol{B r})=\boldsymbol{3} \boldsymbol{3} \times \mathbf{1 0}^{-13} \)
\( \left.\boldsymbol{K}_{s p}(\boldsymbol{A} \boldsymbol{g} \boldsymbol{C l})=\mathbf{1 . 8} \times \mathbf{1 0}^{-\mathbf{1 0}}\right) \)
Which of the above-given option(s) is/are correct?
A. Only A
B. A and B
c. B and c
D. A, B and C | 1 | Chemistry |
Among \( \mathrm{K}, \mathrm{Ca}, \mathrm{Fe} \) and \( \mathrm{Zn}, \) the elements which can form more than one binary compound with chlorine is:
\( A \cdot F e \)
B. zn
\( c \cdot k \)
D. ca | 1 | Chemistry |
Assertion
On satellites we feel weightlessness. Moon is also a satellite of earth. But we
do not feel weightlessness on moon.
Reason
Mass of moon is considerable.
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 |
\( \int \frac{e^{x}-1}{e^{x}+1} d x \)
A \( \cdot \log \left(e^{x}+1\right)-\log e^{x} \)
B \( \cdot 2 \log \left(e^{x}-1\right)-\log e^{x} \)
C \( \cdot 2 \log \left(e^{x}+1\right)-\log e^{x} \)
D \( \cdot 2 \log \left(e^{x}+1\right)+\log e^{x} \) | 2 | Maths |
A particle \( A \) having a charge of \( 2.0 \times \)
\( 10^{-6} C \) is held fixed on a horizontal
table. A second charged particle of mass \( 80 g \) stays in equilibrium on the table at a distance of \( 10 \mathrm{cm} \) from the
first charge. The coefficient of friction
between the table and this second
particle is \( \mu=0.2 . \) Find the range
within which the charge of this second
particle may lie. | 3 | Physics |
If \( p \) and \( q \) are the perpendicular distances from origin to the straight
\( \operatorname{lines} x \sec \theta-y \operatorname{cosec} \theta=a \) and
\( \boldsymbol{x} \cos \boldsymbol{\theta}+\boldsymbol{y} \sin \boldsymbol{\theta}=\boldsymbol{a} \cos 2 \boldsymbol{\theta} \)
then which of the following is correct?
\( \mathbf{A} \cdot 4 p^{2}+q^{2}=a^{2} \)
B \( \cdot p^{2}+q^{2}=a^{2} \)
C \( \cdot p^{2}+2 q^{2}=a^{2} \)
D. \( 4 p^{2}+q^{2}=2 a^{2} \) | 2 | Maths |
Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?
A. is soluble in water
B. is used as a food-preservative.
c. forms 'acid-rain'.
D. is a reducing agent | 1 | Chemistry |
A ball is dropped from a height. If it
takes 0.200 ss to cross the last \( 6.00 m \)
before hitting the ground, find the height from which it is dropped. Take \( \boldsymbol{g}=\mathbf{1 0} \boldsymbol{m} / \boldsymbol{s}^{2} \) | 3 | Physics |
Natural rubber or raw rubber consists of
basic material latex which is a
dispersion of isoprene. During the treatment, this isoprene forms a high molecular weight polymer of isoprene. Natural rubber can be obtained from
five hundred different species of plants.
Which rubber is not a polydiene?
A. Polyisoprene
B. Polychloroprene
c. Thiokal rubber
D. Nitrile rubber | 1 | Chemistry |
Solve the different equation:-
\( \left(\tan ^{-1} y-x\right) d y=\left(1+y^{2}\right) d x \) | 2 | Maths |
Which of the following compound will have highest boiling point?
A. water
B. Ethanol
c. Methanol
D. Dimethylethene | 1 | Chemistry |
The half life of a radioactive nucleus is
50 days.The time interval \( \left(t_{2}-t_{1}\right) \)
between the time \( t_{2} \) when \( \frac{2}{3} \) of it has
decayed and the time \( t_{1} \) when \( \frac{1}{3} \) of it
had delayed is-
A. 50 days
B. 60 days
c. 15 days
D. 30 days | 3 | Physics |
Multiply (-3) and (+5) | 2 | Maths |
The negation of \( \boldsymbol{q} \vee \sim(\boldsymbol{p} \wedge \boldsymbol{r}) \) is? | 2 | Maths |
Maximum -l effect is exerted by the
group:
A . \( -C_{6} H_{5} \)
в. \( -O C H_{3} \)
c. \( -C l \)
D. \( -N O_{2} \) | 1 | Chemistry |
The intensity at the maximum in a
Young's double slit experiment is \( \boldsymbol{I}_{0} \)
Distance between two slits is \( \boldsymbol{d}=\mathbf{5} \boldsymbol{\lambda} \)
where \( \lambda \) is the wavelength of light used
in the experiment. What will be the intensity in front of one of the slits on
the screen placed at a distance \( D= \)
\( 10 d ? \)
\( \mathbf{A} \cdot I_{0} \)
в. \( \frac{I_{0}}{4} \)
c. \( \frac{3}{4} I_{0} \)
D. \( \frac{I_{0}}{2} \) | 3 | Physics |
\( \boldsymbol{C H}_{3}-\boldsymbol{C H}\left(\boldsymbol{C H}_{3}\right)-\boldsymbol{C H}\left(\boldsymbol{C}_{6} \boldsymbol{H}_{5}\right)- \)
\( N H_{2} \)
The IUPAC name of the compound is :
A. \( 1- \) Amino -1 - phenyl - 2 - methyl propane
B. 2- Methyl-1- phenyl propan-1 - amine
c. 2- Methyl-1- amino -1 - phenyl propane
D. 1- -Isopropyl -1 - phenyl methyl amine | 1 | Chemistry |
A die is thrown. \( A \) is the event that
prime number comes up, \( B \) is the event
that the number divisible by three comes up, \( C \) is the event that the
perfect square number comes up. Then, \( A, B \) and \( C \) are :
A. Mutually exclusive
B. Mutually exhaustuve
c. Same
D. None of these | 2 | Maths |
Which of the following compounds has
\( s p^{2} \) -hybridization?
A \( \cdot C O_{2} \)
в. \( S O_{2} \)
\( c \cdot N_{2} O \)
D. \( C O \) | 1 | Chemistry |
Air contains \( 21 \% \) of oxygen by volume.
Calculate the volume of such air
required for the complete combustion
of \( 700 \mathrm{cm}^{3} \) of ethylene \( \left(C_{2} H_{4}\right) \) at \( 15^{\circ} \mathrm{C} \)
and 756 mm pressure. | 1 | Chemistry |
Balance the following equation by ion electron method.
\( M n O_{4}^{2-}+H_{2} O \rightarrow M n O_{4}^{-}+O H^{-}+ \)
\( M n O_{2} \) | 1 | Chemistry |
A coffee cup calorimeter initially contains 125 g of water at a
temperature of \( 24.2^{\circ} \) C. After adding of
\( 10.5 \mathrm{g} \) of \( K B r, \) the temperature
becomes \( 21.1^{\circ} \mathrm{C} \). The heat of solution
is:
A . \( 40 \mathrm{J} / \mathrm{g} \)
в. 117 J / \( g \)
c. \( 167.7 \mathrm{J} / \mathrm{g} \)
D. \( 420.05 \mathrm{J} / \mathrm{g} \) | 1 | Chemistry |
\( \boldsymbol{A}=? \)
\( \boldsymbol{B}=\mathbf{?} \)
A \( . A=2 m, B=7 m \)
В \( . A=7 m, B=5 m \)
\( \mathbf{c} . A=3 m, B=6 m \)
D. \( A=2 m, B=5 m \) | 3 | Physics |
In the given figure, \( P \) is the center of the
circle. The area and perimeter
respectively, of the figure are
A \( \cdot 3256 c m^{2}, 234.2 c m \)
B. \( 2492 \mathrm{cm}^{2}, 229.2 \mathrm{cm} \)
\( \mathbf{c} \cdot 2942 c m^{2}, 234.2 \mathrm{cm} \)
D. \( 3256 c m^{2}, 229.2 c m \) | 2 | Maths |
Areca catechu and supari belongs to the family of
A. Poaceae
B. Palmae
c. Asteraceae
D. Scitamineae | 0 | Biology |
A thin ring has mass \( 0.25 \mathrm{kg} \) and radius
\( 0.5 m . \) Its M.I. about an axis passing
through its centre and perpendicular to its plane is \( \ldots \)
\( \mathbf{A} \cdot 0.0265 g-c m^{2} \)
В. \( 0.0625 \mathrm{kg}-\mathrm{m}^{2} \)
c. \( 0.625 k g-m^{2} \)
D. \( 6.25 \mathrm{kg}-\mathrm{m}^{2} \) | 3 | Physics |
The wire is found to vibrate in the third
harmonic. The maximum emf induced
is
\( A \)
B.
\[
\frac{3(A B) \omega}{k}
\]
\( c \)
\[
\frac{2(A B) \omega}{k}
\]
\( D \)
\[
\frac{(A B) \omega}{k}
\]
E. answer required | 3 | Physics |
Stereoisomers have different:
A. molecular formula
B. structural formula
c. configuration
D. conformation | 1 | Chemistry |
Solve \( \int\left(3 x^{2}-4\right) x d x, x \in R \) | 2 | Maths |
When radiation emitted by a
radioactive substance is subjected to a magnetic field, alpha-particles describe a circle in the clockwise direction
A. beta and gamma particles will also be deflected in the same direction
B. gamma rays will be deflected to describe a circle in the counter clockwise direction but beta particles will not be deflected
C . gamma rays will not be deflected and beta rays will move in a circular path in the counter clockwise sense
D. beta and gamma rays will describe a circle in the counter clockwise sense | 3 | Physics |
Thrombin occurs in vertebrates in
A. The blood and gives it red colour
B. The blood and is important for clotting
C. The liver and is important for bile secretion
D. The stomach and digests proteins | 0 | Biology |
\( \int \cos \left\{2 \tan ^{-1} \sqrt{\frac{1-x}{1+x}}\right\} d x \) is equal to
A \( \cdot \frac{1}{8}\left(x^{2}-1\right)+k \)
B. \( \frac{1}{2} x^{2}+k \)
c. \( \frac{1}{2} x+k \)
D. none of these | 2 | Maths |
Find the order of rotational symmetry of equilateral triangle.
A .2
B. 3
\( c \cdot 4 \)
D. | 2 | Maths |
Ram gains 70 paise on Rs. \( 70 . \) Ram's gain percent is
A \( .0 .1 \% \)
B. 1\%
\( c .7 \% \)
D. \( 10 \% \) | 2 | Maths |
\( \mathbf{f} \boldsymbol{x}, \boldsymbol{y}, \boldsymbol{z} \in \boldsymbol{R} \& \boldsymbol{\Delta}= \)
\( \left|\begin{array}{ccc}\boldsymbol{x} & \boldsymbol{x}+\boldsymbol{y} & \boldsymbol{x}+\boldsymbol{y}+\boldsymbol{z} \\ \mathbf{2} \boldsymbol{x} & \mathbf{5} \boldsymbol{x}+\mathbf{2} \boldsymbol{y} & \mathbf{7} \boldsymbol{x}+\mathbf{5} \boldsymbol{y}+\mathbf{2} z \\ \mathbf{3} \boldsymbol{x} & \mathbf{7} \boldsymbol{x}+\mathbf{3} \boldsymbol{y} & \mathbf{9} \boldsymbol{x}+\mathbf{7} \boldsymbol{y}+\mathbf{3} \boldsymbol{z}\end{array}\right|=-\mathbf{1} \mathbf{6} \)
then value of \( x \) is
A . -2
B. -3
\( c \cdot 2 \)
\( D \) | 2 | Maths |
What are the postulates of JJ Thomson? What are his drawbacks? | 1 | Chemistry |
A body of weight \( 20 \mathrm{N} \) is on a horizontal surface, minimum force applied to pull it when applied force makes an angle
\( 60^{0} \) with horizontal (angle of friction a \( = \)
\( \mathbf{3 0}^{0} \) ) is:
A. 20 N
B. \( 20 \sqrt{3} \) N
c. \( \frac{20}{\sqrt{3}} \mathrm{N} \)
D. zero | 3 | Physics |
Acidic solution of \( F e^{2+} \) ion gives a
brown ring when it comes in contact
with \( N O_{3}^{-} \) ion. Complete the following reactions of this process.
\( \left[\boldsymbol{F} e\left(\boldsymbol{H}_{2} \boldsymbol{O}\right)_{6}\right]^{2+}+_{-}-_{-}-\ldots \rightarrow \)
\( +\boldsymbol{H}_{2} \boldsymbol{O} \) | 1 | Chemistry |
You have \( R s, 2,400 \) in your account and
the interest rate is \( 5 \% \). After how many years would you earn \( R s 240 \) as
interest. | 2 | Maths |
If \( \alpha \& \beta \) are the zeroes of quad polynomial \( \boldsymbol{x}^{2}-(\boldsymbol{k}+\boldsymbol{6}) \boldsymbol{x}+\boldsymbol{2}(\boldsymbol{2} \boldsymbol{k}-\boldsymbol{1}) \)
Find the value of \( k \) so that \( \alpha+\beta=\frac{1}{2} \alpha \beta \) | 2 | Maths |
Which one of the following sets of ions represent the collection of isoelectronic
species?
A \( \cdot K^{+}, C a^{2+}, S c^{3+}, C l^{-} \)
B. \( N a^{+}, M g^{2+}, A l^{3+}, C l^{-} \)
C \( \cdot K^{+}, C l^{-}, M g^{2+}, S c^{3+} \)
D. \( N a^{+}, C a^{2+}, S c^{3+}, F^{-} \) | 1 | Chemistry |
Which of the following is a functions of
the kidney?
A. Filtration of blood to remove wastes
B. Blood pressure regulation
c. pH regulation
D. Both A and C
E. All of the above | 0 | Biology |
\( f(x)=x^{2}-3 x-4 \) find \( f(2) \) | 2 | Maths |
Two events \( A \) and \( B \) are such that
\( \boldsymbol{P}(\boldsymbol{A})=\mathbf{0 . 2}, \boldsymbol{P}(\boldsymbol{B})=\mathbf{0 . 3} \) and \( \boldsymbol{P}(\boldsymbol{A} \)
\( \boldsymbol{B})=\mathbf{0 . 5 . F i n d} \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B}) \)
\( \mathbf{A} \cdot \mathbf{0} \)
B. 0.2
\( c .0 .3 \)
D. 0.5 | 2 | Maths |
Velocity of light in centimeter per nano second is | 3 | Physics |
Among the following, is unstable in free space.
A. Electron
B. Proton
c. Neutron
D. \( \alpha \) -particle | 3 | Physics |
mole of an ideal gas STP is subjected to a reversible adiabatic expansion to double its volume. The change in internal energy \( (\gamma=1.4) \)
A . 1169 J
B. 769 J
c. 1373 J
D. 969 J | 1 | Chemistry |
Working of a pump is based on the
A. force of friction
B. atmospheric pressure
c. gravitational force
D. volume of fluid extracted | 3 | Physics |
Stream line flow of a liquid at a given point.
A. Has the same magnitude
B. Has the same direction
c. Both a and \( b \)
D. None of these | 3 | Physics |
An electron revolves along a circular
path of radius \( 20 \mathrm{cm} \) with constant
angular velocity 120 rads \( ^{-1} \) about an axis passing through the centre and perpendicular to the plane of the circle. If the external magnetic field is absent,
then the potential difference between the centre of the circle and a point on
the circumference of the circle is (Mass
of the electron \( \left.=9.1 \times 10^{-31} k g\right) \)
\( \mathbf{A} \cdot 3.691 \times 10^{-9} V \)
B . \( 1.638 \times 10^{-9} V \)
C \( .4 .278 \times 10^{-9} V \)
D . \( 2.347 \times 10^{-9} V \) | 3 | Physics |
In the given reaction the underlined substance is:
\( \mathbf{6} \boldsymbol{N} \boldsymbol{H}_{4} \boldsymbol{O} \boldsymbol{H}+\boldsymbol{A} \boldsymbol{l}_{2}(\boldsymbol{O} \boldsymbol{H})_{3} \rightarrow \boldsymbol{2} \boldsymbol{A} \boldsymbol{l}(\boldsymbol{O} \boldsymbol{H})_{3} \)
A. aluminium sulphate
B. aluminium hydroxide
c. ammonium sulphate
D. ammonia | 1 | Chemistry |
Explain the steps involved in the formation of root nodule. | 0 | Biology |
Construct a triangle \( P Q R \) in which
\( Q R=4.8 c m, \angle Q=45^{\circ} \) and \( \angle R=55^{\circ} \) | 2 | Maths |
Covalency of nitrogen in ammonium ion is:
A .2
B. 3
\( c \cdot 4 \)
\( D \) | 1 | Chemistry |
Fill in the blanks:
(a) The planet which is farthest from the Sun is
(b) The planet which appears reddish in colour is
(c) A group of stars that appear to form a pattern in the sky is known as
(d) A celestial body that revolves around a planet is known as
(e) Shooting stars are actually not
(f) Asteroids are found between the
orbits of \( \quad \) and | 3 | Physics |
If \( \angle D \cong \angle B \) and \( \angle B \cong \angle Q, \) then \( \angle D \cong \)
\( \angle Q \) is a \( ------ \) property of
congruence.
A. reflexive
B. transitive
c. symmetric
D. addition postulate | 2 | Maths |
Arrange the following in decreasing order of acidic strength.
I. Benzoic acid
II. 4 -nitrobenzoic acid
III. 3,4 -dinitrobenzoic acid
IV. 4-methoxy benzoic acid
\( A \cdot|||>||>|>\mid V \)
B. |||>|| > IV > |
c. \( \|>\| \backslash>\mid v>1 \)
D. |> || > || > IV | 1 | Chemistry |
Consider the plane \( S \) formed by the dipole axis and the axis of earth. If \( P \) be the point of intersection of the geographical and magnetic equators then the declination and dip angle at point \( P \) are
A. \( 0^{\circ}, 11.3^{\circ} \)
В. \( 11.3^{\circ}, 0^{\circ} \)
c. \( 11.3^{\circ}, 11.3^{\circ} \)
D. \( 0^{\circ}, 0^{\circ} \) | 3 | Physics |
lodine cannot be deformed into a wire
because:
\( A \). it is a non-metal
B. it is brittle
c. both A and B
D. none of above | 1 | Chemistry |
\( 1- \)phenyl\( -2- \)chloropropane on
treating with alc. \( K O H \) gives mainly:
A. 1-phenylpropene
B. 2-phenylpropene
c. 1 -phenylpropane-2-ol
D. 1-phenylpropan-1-ol | 1 | Chemistry |
Cilliary muscles in the eye:
A. hold the eye lens in place
B. increase or decrease focal length of eye lens.
C. both (a) and (b)
D. none of these | 3 | Physics |
A major constituent of vinegar is:
A. methanoic acid
B. benzoic acid
c. ethanoic acid
D. picric acid | 1 | Chemistry |
f \( ^{n} C_{4},^{n} C_{5} \) and \( ^{n} C_{6} \) are in AP, then \( n \) is
A . 7 or 14
B. 7
c. 14
D. 14 or 21 | 2 | Maths |
The main constituent of biogas is:
A. Methane
B. Carbon dioxide
c. Hydrogen
D. Hydrogen sulphide | 3 | Physics |
The wrong statement about \( N_{2} O \) is that:
A . it is nitrous oxide
B. it is least reactive oxide of nitrogen
c. it is not a linear molecule
D. it is known as laughing gas | 1 | Chemistry |
Which of the following contributed to the success of Mendel?
A. His knowledge of biology
B. Qualitative analysis of data
c. observation of distinct inherited traits
D. consideration of one character at a time | 0 | Biology |
Polyacrylamide gel is prepared by mixing acrylamide and at fixed
proportions.
A . glycol
B. bisacrylamide
c. hydrazine
D. none of the above | 1 | Chemistry |
Find the sum to 90 terms of the series
\( \mathbf{5}+\mathbf{5 5}+\mathbf{5 5 5}+\cdots \cdots \)
A \( \frac{50}{81}\left[10^{90}-82\right] \)
в. \( \frac{50}{81}\left[10^{90}-83\right] \)
c. \( \frac{50}{81}\left[10^{90}-80\right] \)
D. \( \frac{50}{81}\left[10^{90}-90\right] \) | 2 | Maths |
Diethyl ether reacts with \( P C l_{5} \) to form:
This question has multiple correct options
A. ethyl chloride
B. phosphorous oxy trichloride
c. 1,2 -dichloroethane
D. ethene | 1 | Chemistry |
Phosphoric acid melts at \( 44^{\circ} \mathrm{C} \)
A. True
B. False | 1 | Chemistry |
Assertion: The volume of 1 mole of an
ideal gas at 1 bar pressure at \( 25^{0} C \) is \( 24.78 \mathrm{L} \)
Reason: 1 bar \( =0.987 \) atm
A. Both Assertion and reason are correct and reason is correct explanation of Assertion
B. Both assertion and reason are correct but reason is not correct explanation of assertion
c. Assertion is correct but reason is incorrect
D. Assertion is incorrect but reason is correct | 1 | Chemistry |
Two ball \( A \) and \( B \) of same mass \( (M) \)
and charges \( Q,-Q \) are suspended by
two strings of same length from two
different suspension points \( S_{1} \) and \( S_{2} \) if
\( S_{1} S_{2}=3 x \) and \( A B=x \) then show that
tension in the string is \( T=\frac{Q^{2} L}{4 \pi \in_{0} x^{3}} \) \( \tan \theta=\frac{Q^{2}}{4 \pi \in_{0} x^{2} M g} \) | 3 | Physics |
The movement of colloidal particles, under applied electric current is know
as:
A. electrodialysis
B. dialysiss
c. electrophoresis
D. none of the above | 1 | Chemistry |
Simplify : \( \frac{\boldsymbol{a}^{3}-\mathbf{2 7}}{\mathbf{5 a}^{2}-\mathbf{1 6 a}+\mathbf{3}} \div \)
\( \frac{\boldsymbol{a}^{2}+\mathbf{3} \boldsymbol{a}+\mathbf{9}}{\mathbf{2 5 a}^{2}-\mathbf{1}} \) | 2 | Maths |
Offspring formed as a result of sexual reproduction exhibit more variations
because
A. Sexual reproduction is a lengthy process
B. Genetic material comes from two parents of the same species
c. Genetic material comes from two parents of different species
D. Genetic material comes from many parents | 0 | Biology |
Find the distance between the following pairs of points:
(i) (2,3,5) and (4,3,1)
\( (i i)(-3,7,2) \) and ((2,4,-1)
(iii) (-1,3,-4) and (1,-3,4)
(iv) (2,-1,3) and (-2,1,3) | 2 | Maths |
Following reaction is used to produce
\( B r_{2} \)
\( \mathbf{5} \boldsymbol{B r}^{-}+\boldsymbol{B r O}_{3}^{-}+\boldsymbol{6 H}^{+} \longrightarrow \boldsymbol{3} \boldsymbol{B r}_{2}+ \)
\( 3 H_{2} O \)
In this reaction:
\( \mathbf{A} \cdot B r^{-} \) disproportionates to \( B r_{2} \)
B. \( B r O_{3}^{-} \) disproportionates to \( B r_{2} \)
\( \mathrm{C} \cdot B r^{-} \) has been oxidised and \( B r O_{3}^{-} \) has been reduced
D. \( B r^{-} \) has been reduced and \( B r O_{3}^{-} \) has been oxidised | 1 | Chemistry |
Identical constant forces push two
identical cars \( A \) and \( B \) continuously from a starting line to a finish line. The
cars move on a frictionless horizontal
surface. If car A is initially at rest and car-B is initially moving right with speed \( V \) o. Choose the correct
statement
c. Both cars has the same change in momentum
D. No enough information is given to decide | 3 | Physics |
Which of the following is not
correctly matched?
A
B. Nylon-6,6 \( -\left[-N H\left(C H_{2}\right)_{6}-N H-C O-\left(C H_{2}\right)_{4}-\stackrel{\circ}{N}-\right]_{n}- \)
\( c \)
Terylene \( \left[\mathrm{ocH}_{2}-\mathrm{cH}_{2}-\left\|^{\mathrm{O}}\right\|_{\mathrm{n}}^{\mathrm{O}}\right]_{\mathrm{n}} \)
Datural Rubber \( \left.\left[-C H_{2}-C^{C H_{3}}\right]{ }=C H-C H_{2}-\right]_{n} \) | 1 | Chemistry |
Write the differences between
physisorption and chemisorption with
respect to the following:
(i) specificity
(ii) temperature dependence
(iii) reversibility
(iv) enthalpy change | 1 | Chemistry |
If the translatory kinetic energy of a rolling solid sphere is \( 35 J \), then its total kinetic energy is:
A . \( 42 J \)
B. \( 49 J \)
c. 56.5
D. \( 63 J \) | 3 | Physics |
Graph shows the acceleration of \( 3 g \)
particle as an applied force moves it
from rest along \( \boldsymbol{x} \) - axis. The total work
done by the force on the particle by the
time the particle reaches \( \boldsymbol{x}=\mathbf{6 m}, \) is
equal to | 3 | Physics |
n the triangle \( A B C, \angle A C E=130^{\circ} \)
\( \operatorname{segment} A D=A D=D C, \) then find
the measure of an \( \angle A B C \) | 2 | Maths |
toppr 5
\( Q \) туре уоиг question
and \( B_{2} \) (dashed line). If \( B_{2} \) is larger thar
\( B_{1}, \) which of the following graphs shows
the correct variation of \( \mathrm{R} \) and \( \mathrm{T} \) in these
fields? | 3 | Physics |
When do we consider a person to be
myopic?
A. He has poor near vision or blurred vision at all distances
B. He can not identify colors
C. He has poor night vision
D. He can see fine upto close distance, but distant objects are a blur | 3 | Physics |
We consider the radiation emitted by the human body. Which of the following statements is true:
A. The radiation emitted is in the infrared region
B. The radiation is emitted only during the day
c. The radiation is emitted during the summers and absorbed during the winters
D. The radiation emitted lies in the ultraviolet region and hence is not visible | 3 | Physics |
Excretory organs of urochordates are
A. Neural gland
B. Pyloric glandd
c. Nephrocytes
D. None of the above | 0 | Biology |
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