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Consider the following two statements:
1) Kirchoff's junction law follows from
the conservation of charge
2) Kirchoff's loop law follows from the conservation of energy. Which of the following is correct?
A. both 1 and 2 are wrong
B. 1 is correct and 2 is wrong
C. 1 is wrong and 2 is correct
D. both 1 and 2 are correct | 3 | Physics |
Match the columns
i. amount of light entering into eye
a. rodes controlled by
ii. colour sensing cells
b. cones
iii.cells helping in vision in dim light
c. iris
d.
iv.junction of optic nerve and retina \( \quad \) blindspot
\( A \cdot i-a, i i-b, i i i-c, i v-d \)
B. \( i-d, i i-c, i i i-b-i v-a \)
\( \mathbf{C} \cdot \mathbf{i}-\mathrm{c}, \mathrm{i} \mathbf{i}-\mathrm{b}, \mathrm{i} \) ii-a, \( \mathrm{iv}-\mathrm{d} \)
D. i-b,ii-a,iii-c,iv-b | 3 | Physics |
As per Census 2011 , India has \( 2.4 \% \) of
world's land area and is home to
of the total world population.
\( A \). \( 23.1 \% \)
B . 10.5\%
c. \( 17.5 \% \)
D. 12.8\% | 0 | Biology |
The Fermi level in intrinsic semi-
conductors at \( 0 K \) temperature lies:
A. Near the conduction band
B. Near the valence band
C. In the middle of valence and conduction band
D. Inside the conduction band | 3 | Physics |
Find the surface area of the hemisphere
whose radius is \( 7 \mathrm{cm} \) | 2 | Maths |
Earthly particles in an ore are removed from heavier metal ore using
water in:
This question has multiple correct options
A. levigation
B. hydraulic washing
c. leaching
D. gravity separation | 1 | Chemistry |
In rectangle \( A B C D, \) diagonal \( B D=26 \mathrm{cm} \) and cotangent of angle \( A B D=1.5 . \) Flnd the area and the perimeter of the rectangle ABCD
A. Area = 436 sq. cm and perimeter = \( 11 \sqrt{13} \mathrm{cm} \)
B. Area = 842 sq. cm and perimeter = \( 15 \sqrt{13} \mathrm{cm} \)
c. Area \( =312 \) sq. \( \mathrm{cm} \) and perimeter \( =20 \sqrt{13} \mathrm{cm} \)
D. Area = 231 sq. cm and perimeter = \( 12 \sqrt{13} \mathrm{cm} \) | 2 | Maths |
How many times is the weight of the air filling a room in winter \( \left(7^{0} C\right) \) greater than
weight in summer \( \left(37^{0} C\right) \) ? Assume that
pressure is constant.
A . 1.1
B. 0.90
c. 11.1
D. 9.0 | 3 | Physics |
Points are to be recognised on X-Y plane
to draw graph of equation \( 2 x+3 y=12 \)
So fill the boxes given below and
identify points.
\begin{tabular}{|c|c|c|c|c|}
\hline\( x \) & \( -2 . \) & 3 & 6 & \( \square \) \\
\hline\( y \) & 4 & \( \square \) & \( \square \) & 6 \\
\hline\( (x, y) \) & \( \square \) & \( \square \) & \( \square \) & \\
\hline
\end{tabular} | 2 | Maths |
The equilibrium of the reaction
\( N_{2}(g)+3 H_{2}(g) \Leftrightarrow 2 N H_{3}(g) \) will shift
to the product side when
A. Concentration of \( N_{2} \) is increased
B. Concentration of \( N_{2} \) is decreased
c. concentration of \( N H_{3} \) is increased
D. concentration of \( H_{2} \) is decreased | 1 | Chemistry |
An artificial satellite is revolving round the earth. The radius of its circular orbit is half the orbital radius of moon. The
time taken by this satellite in completing one revolution will be
A. 2 lunar months
B \( \cdot 2^{-2 / 3} \) lunar months
\( \mathrm{c} \cdot 2^{-3 / 2} \) lunar months
D. \( 1 / 2 \) lunar months | 3 | Physics |
Nucleic acids are called acids
mainly because of the presence of
A. \( -C O O H \) group
B. - OH group of sugar unitt
c. \( -O H \) group of the heterocyclic base
D. - OH group of phosphate unitt | 1 | Chemistry |
Why plastic sulphur is elastic in
nature? | 1 | Chemistry |
Find the sum of bond order and number
of \( \pi \) bonds in \( B_{2} \) molecule. | 1 | Chemistry |
Metal oxide can be reduced by
A . \( F e \)
в. \( S n \)
\( c . c \)
D. All of these | 1 | Chemistry |
Open circulatory system occurs in
A. Octopus
B. Pheretima
c. Periplaneta
D. Rana | 0 | Biology |
What is the time required for the same
amount of water to flow out if the water
level in tank is maintained always at a height of \( 1 m \) from orifice? | 3 | Physics |
Number of moles of \( 1 m^{3} \) gas, at \( \mathrm{STP} \)
are:
A . 44.6
B. 40.6
c. 42.6
D. 48.6 | 1 | Chemistry |
Evaluate the following limits. \( \lim _{x \rightarrow 0}(\cos x+\sin x)^{1 / x} \) | 2 | Maths |
An emulsion is a colloidal solution of:
A . two solids
B. two liquids
c. two gases
D. one solid and liquid | 1 | Chemistry |
Find the slope of the line passing
through the points \( G(-4,5) \) and \( \boldsymbol{H}(-\mathbf{2}, \mathbf{1}) \) | 2 | Maths |
Which of the following devices is used to detect the presences of a charge on a body?
A. Multimeter
B. Electroscope
c. Angiogram
D. Microscope | 3 | Physics |
\( n s^{1} \) electronic configuration is not
present in:
\( A \cdot A g \)
в. мп
\( c \cdot c r \)
D. cu | 1 | Chemistry |
Find the values of \( x \) and \( y \) in the following figures
A \( . x=80^{0} ; y=120 \)
В . \( x=50^{0} ; y=30^{0} \)
C . \( x=50^{\circ} ; y=130^{\circ} \)
D . \( x=20^{0} ; y=10^{0} \) | 2 | Maths |
A toroid has a core (non -ferromagnetic) of inner radius \( 25 \mathrm{cm} \) and outer radius
\( 26 \mathrm{cm}, \) around which 3500 turns of a
wire are wound. If the current in the wire
is \( 11 A, \) what is the magnetic field (a) outside the toroid,
(b) inside the core of
the toroid, and
(c) in the empty space surrounded by the toroid. | 3 | Physics |
From the given figure calculate:
¡) \( \angle A D C \)
ii) \( \angle A B C \)
iii) \( \angle B A C \) | 2 | Maths |
The smallest number by which 3600 can be divided to make it a perfect cube is:
\( A \cdot 9 \)
B. 50
\( c .300 \)
D. 450 | 2 | Maths |
The term water-pollution can be defined in several ways. Which of the following
statements does not give the correct definition?
A. The addition of undersirable substances to water bodies
B. The removal of dersirable substances from water bodies
c. A change in pressure of the water bodies.
D. A change in temperature of the water bodies | 1 | Chemistry |
Aluminum hydroxide is used for:
A. fire extinguishers
B. antacid
C . water purification
D. all of the above | 1 | Chemistry |
Green house effect means
A. Increase in the temperature of earth due to high
concentration of \( \mathrm{NO}_{2} \)
B. Increase in the temperature of earth due to high concentration of \( \mathrm{SO}_{2} \)
C. Increase in the temperature of earth due to high concentration of CO
D. Increase in the temperature of earth due to high concentration of \( \mathrm{CO}_{2} \) | 0 | Biology |
The process of removing dissolved
impurities from a colloidal system by means of diffusion through suitable
membrane under the influence of an
electric field is called:
A . electro-osmosis
B. electrodialysis
c. electrophoresis
D. peptization | 1 | Chemistry |
The liquid or solid on the surface of which the molecule of the substance
are adsorbed is called adsorbate.
If this is true enter 1 , if false enter 0 . | 1 | Chemistry |
The electric current in a circular coil of
two turns produced a magnetic
induction of \( 0.2 \mathrm{T} \) at its centre. The coil
is unwound and then rewound into a
circular coil of four turns. If same
current flows in the coil, the magnetic induction at the centre of the coil now
is:
A. \( 0.2 T \)
в. \( 0.4 \mathrm{T} \)
\( c .0 .65 \)
D. 0.8 T | 3 | Physics |
Aspirin is known as:
A. Acetyl salicylic acid
B. Phenyl salicylate
C . Acetyl salicylate
D. Methyl salicylic acid | 1 | Chemistry |
Which one of the following compounds has the electron-pair geometry as di trigonal bipyramidal with three equatorial positions occupied by lone pairs of electrons?
\( \mathbf{A} \cdot\left[A l C l_{3}\right] \)
в. \( X e F_{2} \)
\( \mathbf{c} \cdot\left[P t\left(N H_{3}\right)_{2} C l_{2}\right] \)
D. \( C H_{3}-M g-B r \) | 1 | Chemistry |
Find the sum of the following APs:
\( 0.6,1.7,2.8, \dots \dots \) to 100 terms
A. 5475
B. 5505
\( c \cdot 6589 \)
D. 3844 | 2 | Maths |
A survey conducted on 20 household in a locality by a group of statement resulted in the following frequency table for the number of family Members in a house hold.
Family size \( \begin{array}{ccc}1- & 3- & 5 \\ 3 & 5 & 7\end{array} \)
Number of families
Find the mode of the data. | 2 | Maths |
Find the amount and the compound
interest on Rs.120000 at 8\% per annum
for 1 year, compounded half-yearly. | 2 | Maths |
Which of the following will give \( S_{N} \)
reaction?
A. \( R-B r \)
в. \( R-N_{3} \)
c \( \cdot R-O_{H_{2}}^{\oplus} \)
D. All | 1 | Chemistry |
The twinkling of stars is due to atmospheric
A. Refraction of light
B. Reflection of light
c. scattering of light
D. Dispersion of light | 3 | Physics |
1.0 g of magnesium is burnt with 0.56 g \( O_{2} \) in a closed vessel. Which reactant is
left in excess and how much ? (At.wt. \( \mathrm{Mg}=24 ; 0=16) \)
A. \( \mathrm{Mg}, 0.16 \mathrm{g} \)
в. \( O_{2}, 0.16 \mathrm{g} \)
c. \( \mathrm{Mg}, 0.44 \mathrm{g} \)
D. \( O_{2}, 0.28 \mathrm{g} \) | 1 | Chemistry |
Match column I with column II and
select the correct answer using the codes given below:
Column I \( \quad \) Column
(A) \( \frac{14}{6} C \) and \( _{6}^{13} C \)
(p) Different
number of neutrons
(B) 40
20 \( \mathrm{Ca} \) and \( _{18}^{40} \boldsymbol{A r} \)
(q) Different
number of protons and neutrons
(C) \( \boldsymbol{K}(\mathbf{1} \mathbf{9}) \)
(r) Non-metal
(D) Chlorine (17)
(s) Metal
\( A \cdot A-(p) ; B-(q) ; C-(r) ; D-(s) \)
B. \( A-(q) ; B-(p) ; C-(s) ; D-(r) \)
c. \( A-(p) ; B-(q) ; C-(s) ; D-(r) \)
\( D \cdot A-(p) ; B-(s) ; C-(q) ; D-(r) \) | 1 | Chemistry |
Silver is removed electrolytically from
\( 200 m L \) of a \( 0.1 N \) solution of \( A g N O_{3} \)
by a current of 0.1 A. How long will it take to remove half of the silver from the solution?
A . \( 0.1 s \)
B. \( 100 s \)
\( \mathbf{c} .965 s \)
D. \( 9650 s \) | 1 | Chemistry |
Which of the following is least volatile?
\( \mathbf{A} \cdot H F \)
в. \( H C l \)
\( \mathbf{c} \cdot H B r \)
D. \( H I \) | 1 | Chemistry |
A neuron transmits information
through
A. Electrical signals
B. Chemical signals
c. Both A and B
D. None of the above | 0 | Biology |
Concentrated \( H_{2} S O_{4} \) cannot be used to
prepare \( H B r \) from \( N a B r \) because it
A. reacts slowly with NaBr
B. oxidises HBr
c. reduces HBr
D. disproportionates HBr | 1 | Chemistry |
Which of the following is the most basic?
\( \mathbf{A} \cdot C e(O H)_{3} \)
в. \( L u(O H)_{3} \)
\( \mathbf{c} \cdot Y b(O H)_{3} \)
D. \( A l(O H)_{3} \) | 1 | Chemistry |
\( A \) and \( B \) are two events on a sample
space \( S \) such that \( P(A)=0.8, P(B)= \)
\( \mathbf{0 . 6} \) and \( \boldsymbol{P}(\boldsymbol{A} \cup \boldsymbol{B})=\mathbf{0 . 9} \) find \( (\boldsymbol{A} \cap \boldsymbol{B}) \)
A . 0.3
B. 0.4
\( c \cdot 0.5 \)
D. 0.6 | 2 | Maths |
The least vlue of the function \( f(x)= \) \( \boldsymbol{a x}+\frac{\boldsymbol{b}}{\boldsymbol{x}}(\boldsymbol{a}>\mathbf{0}, \boldsymbol{b}>\mathbf{0}, \boldsymbol{x}>\mathbf{0}) \) is | 2 | Maths |
The commonly used pain reliever, aspirin, has the molecular formula
\( C_{9} H_{8} O_{4} . \) If a sample of aspirin contains
\( 0.968 g \) of carbon, what is the mass of hydrogen in the sample?
A \( .0 .717 g \)
в. \( 0.0717 g \)
c. \( 8.000 g \)
D. \( 0.645 g \) | 1 | Chemistry |
An object moving with a speed of 6.25 \( \mathrm{m} / \mathrm{s}, \) is decelerated at a rate given by \( \frac{d v}{d t}=-2.5 \sqrt{v} \) where \( v \) is the instantaneous speed. The time taken by the object, to come to rest, would be then
\( \mathbf{A} \cdot 2 s \)
B . \( 4 s \)
c. \( 8 s \)
D. \( 1 s \) | 3 | Physics |
The moles of oxygen and carbondioxide involved in glycolysis are respectively:
A .4,6
в. 4,4
c. 6,6
D. 8,6 | 1 | Chemistry |
Write the differences between convex
and concave lens. | 3 | Physics |
Solve:
\( \tan \left(\cos ^{-1} \frac{1}{x}\right)=\sin \left(\cot ^{-1} \frac{1}{x}\right) \) | 2 | Maths |
Answer the following questions for Zn
atom:
How many electrons have \( l-m=1 ? \) | 1 | Chemistry |
A wheel has moment of inertia \( 5 x \)
\( 10^{-3} k g m^{2} \) and is making 20 rev/sec.
The torque needed to stop it in 10 sec is
\[
\mathbf{x} \mathbf{1 0}^{-\mathbf{2}} \mathbf{N}-\boldsymbol{m}:
\]
A . \( 2 \pi \)
в. \( 2.5 \pi \)
c. \( 4 \pi \)
D. \( 4.5 \pi \) | 3 | Physics |
Light of two different frequencies whose photos have energies leV and 2.5eV respectively illuminate a metallic surface whose work function is \( 0.5 e v \)
successively. Ratio of maximum speeds of emissions will be
\( A \cdot 1: 4 \)
B. 1:
\( c \cdot 1: \)
D. 1: | 3 | Physics |
Match the Following: | 1 | Chemistry |
If the frequency of a transverse wave is \( 10 H z . \) And the distance between the
two consecutive wave crests is \( 2 m \)
Calculate the wave speed. | 3 | Physics |
It is chemisorption if chemical forces exist between adsorbate and adsorbent.
A. True
B. False | 1 | Chemistry |
Which quantity of a two particles system depend only on the separation between the two particles?
A. Kinetic energy
B. Total mechanical energy
c. Potential energy
D. Both (A) and (B) | 3 | Physics |
A wheel is rotating at 1800 rpm about its own axis. When the power is switched oft it comes to rest in 2 min.
Then, the angular retardation in rad \( s^{-1} \)
is
\( \mathbf{A} \cdot 2 \pi \)
в. \( \pi \)
c. \( \pi / 2 \)
D . \( \pi / 4 \)
E . \( \pi / 6 \) | 3 | Physics |
The compounds whose structures are
shown below would have:
A. different melting points
B. the same melting point
C . equal but opposite optical rotations
D. none of these | 1 | Chemistry |
The non-protein component in enzymes, which is necessary for its biological activity, is called:
A . nucleic acid
B. lipid
c. phosphoric acid
D. coenzyme | 1 | Chemistry |
Name the following compounds.
(i)
(ii)
(iii) \( \mathrm{H}_{3} \mathrm{C}-\mathrm{C}=\mathrm{CH} \)
(iv)
(v) \( \mathrm{H}_{6} \mathrm{C}-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH} \) | 1 | Chemistry |
State whether the given statement is true or false:
Copper metal reduces \( F e^{2+} \) in an acid
medium. | 1 | Chemistry |
Consider the following statements and arrange in the order of true/false as
given in the codes.
\( S_{1}: \) Change in state function between
two states is a definite quantity and
does not depend on path.
\( S_{2}: \) Intensive properties cannot be
algebraically added or subtracted.
\( S_{3}: \) Ratio of two extensive properties
result in a parameter that depends on the amount of substance.
\( S_{4}: \) Molar heat capacity is a state
function.
The correct order to true/false of the
above statements is:
\( A \). FT FT
B. FF FT
c. TT FT
D. TTTF | 1 | Chemistry |
Compared to the first ionization potential, the value of second ionization potential of an element is:
A. Negligible
B. Smaller
c. Greater
D. Double | 1 | Chemistry |
A solution containing \( 25.6 g m \) of
sulphur dissolved in \( 1000 g \) of
naphthalene gave a freezing point lowering of 0.680 , then molecular formula of sulphur is:
\( A \cdot S_{2} \)
в. \( S_{4} \)
c. \( S_{6} \)
D. \( S_{8} \) | 1 | Chemistry |
A dip needle in a plane perpendicular to magnetic meridian will be :
A. Vertical
B. Horizontal
C. At an angle of \( 4^{\circ} \) to the horizontal
D. At an angle of dip to the horizontal | 3 | Physics |
\( \underbrace{\frac{2}{k}}{\frac{k}{k}} \) | 3 | Physics |
Which one of the following is not a
correct match?
A. Teflon- Tetrafluoroethylene
B. Plexi glass - Methyl methacrylate
c. orlon - Glycerol, phthalic anhydride
D. Buna-S- - Styrene, 1-3 butadiene | 1 | Chemistry |
In the following reaction, the correct
statements are:
\( M g+2 H^{+} \rightarrow M g^{2+}+H_{2} \)
1. \( M g \) is a reducing agent, \( H^{+} \) is an oxidising agent
2. \( M g \) is oxidising agent, \( H^{+} \) is a reducing agent.
A. only 1
B. only 2
c. both
D. none | 1 | Chemistry |
The tenth term of the series 9,8,7,6
\( \ldots . \) is | 2 | Maths |
Find the values of the following determinants where \( i=\sqrt{-1} \)
\( (i)\left|\begin{array}{cc}2 i & -3 i \\ i^{3} & -2 i^{5}\end{array}\right| \)
\( (i i)\left|\begin{array}{cc}\mathbf{1}+\mathbf{3} i & \boldsymbol{i}-\mathbf{2} \\ \boldsymbol{i}+\mathbf{2} & \mathbf{1}-\mathbf{3} i\end{array}\right| \) | 2 | Maths |
The high reactivity and low volatility of white phosphorus is due to :
A. Tetrahedrally arranged \( P_{4} \) units
B. bonds angle of \( 60^{\circ} \)
c. weak van der Waal's force of attraction
D. increased steric (strain) factor | 1 | Chemistry |
A mass \( m_{1} \) moves with a grate velocity.
It strikes another mass \( m_{2} \) at rest in
head-on collision. It comes back along
its path with low speed after collision. Then :
\( \mathbf{A} \cdot m_{1}>m_{2} \)
В. \( m_{1}<m_{2} \)
\( \mathbf{c} \cdot m_{1}=m_{2} \)
D. there is no relation between \( m_{1} \) and \( m_{2} \) | 3 | Physics |
A mass of \( 5 \mathrm{kg} \) is suspended on a spring of stiffness \( 4000 \mathrm{N} / \mathrm{m} \). The system is fitted with a damper with a damping ratio of 0.2. The mass is pulled down 50 \( \mathrm{mm} \) and released. Calculate the
displacement after 0.3 sec:
\( \mathbf{A} \cdot 4.07 \mathrm{mm} \)
в. \( 4.7 \mathrm{mm} \)
\( c .7 .4 \mathrm{mm} \)
D. 7.04 mm | 3 | Physics |
Match the List I with the List II. | 2 | Maths |
Which of the following is not an oligosaccharide?
A. Xylose
B. Maltose
c. Raffinose
D. stachyrose | 1 | Chemistry |
Give scientific name of Cabagge. Name the family to which it belongs. | 0 | Biology |
The statement form \( (\boldsymbol{p} \Leftrightarrow \boldsymbol{r}) \Rightarrow(\boldsymbol{q} \Leftrightarrow \boldsymbol{r}) \)
is equivalent to
\( \mathbf{A} \cdot[(\sim p \vee r) \wedge(p \vee \sim r)] \vee \sim[(\sim q \vee r) \wedge(q \vee \sim r)] \)
\( \mathbf{B} \cdot \sim[(\sim p \vee r) \wedge(p \vee \sim r)] \wedge[(\sim q \vee r) \vee(q \vee \sim r)] \)
\( \mathbf{c} \cdot[(\sim p \vee r) \wedge(\sim p \vee \sim r)] \wedge[(\sim q \vee r) \wedge(q \vee \sim r)] \)
\( \mathbf{D} \cdot \sim[(\sim p \vee r) \wedge(p \vee \sim r)] \wedge[(\sim q \vee r) \wedge(q \vee \sim r)] \) | 2 | Maths |
Borax is used as cleansing agent because on dissolving in water it gives
A. alkaline solution
B. acidic solution
c. bleaching solution
D. colloidal solution | 1 | Chemistry |
The following is the frequency
distribution of time (in minutes) a
worker takes to complete the work. Find mean time taken by a worker to
complete the work by using 'Assumed Mean Method'.
\begin{tabular}{ll}
Time (in minutes) & No. of Workers \\
\( 20-24 \) & 2 \\
\( 25-29 \) & 10 \\
\( 30-34 \) & 20 \\
\( 35-39 \) & 28 \\
\( 40-44 \) & 25 \\
\( 45-49 \) & 15 \\
\hline
\end{tabular} | 2 | Maths |
n the figure, \( \angle P Q S=\angle P R T \) and
\( \mathrm{QS}=\mathrm{TR} . \) then \( \Delta P Q S \cong \Delta P R T \mathrm{by} \)
congruence postulate
\( A \cdot \operatorname{sas} \)
B. sss
\( c . \) RHS
D. AAS | 2 | Maths |
Find the sum of the following infinite
G.P.:
\( \frac{1}{3}, \frac{-2}{9}, \frac{4}{27}, \frac{-8}{81}, \dots \)
A \( \cdot \frac{1}{2} \)
B.
\( c \cdot \frac{1}{3} \)
D. | 2 | Maths |
Why welders generally wear mask during welding? | 3 | Physics |
Atomic weight of weight of an element is 30 its equivalent wt. is 10 The valency of element will be-
\( A \)
B. 2
\( c \cdot 3 \)
D. 4 | 1 | Chemistry |
Let \( R \) be a reflexive relation on a finite
set \( A \) having \( n \) elements, and let there
be \( m \) ordered pairs in \( R, \) then:
A \( . m \geq n \)
в. \( m \leq n \)
c. \( m=n \)
D. \( m<n \) | 2 | Maths |
Which of the following does has no \( S- \)
\( \boldsymbol{S} \) bond?
A \( \cdot H_{2} S_{2} O_{4} \)
в. \( H_{2} S_{2} O_{5} \)
\( \mathbf{c} \cdot H_{2} S_{2} O_{6} \)
D. \( H_{2} S_{2} O_{7} \) | 1 | Chemistry |
Match the following | 2 | Maths |
Which statement is correct for alkaline
earth
metals?
A. They are diatomic and form ions of the type \( M^{2} \)
B. They are highly electronegative elements
c. They are monoatomic in vapour state and form
ions of the type \( M^{2+} \)
D. They are diatomic and form ions of the type \( M^{2+} \) | 1 | Chemistry |
Formation of periderm is the function of
A. vascular cambium
B. Cork cambium
c. Both vascular and cork cambium
D. None | 0 | Biology |
The rank of the word \( N U M B E R \)
obtained, if the letters of the word
\( N U M B E R \) are written in all possible
orders and these words are written out
as in a dictionary is
A .468
в. 469
c. 470
D. 471 | 2 | Maths |
In the reaction, \( A g_{2} O+H_{2} O_{2} \rightarrow \)
\( 2 A g+H_{2} O+O_{2}, \) the \( H_{2} O_{2} \) acts as:
A. oxidising agent
B. bleaching agent
c. acid
D. reducing agent | 1 | Chemistry |
In Aulosira, Tolypothrix and Nostoc, are the sites for nitrogen fixation
A. Vesicles
B. Arbuscles
c. Akinetes
D. Heterocysts | 0 | Biology |
Which of the following combinations of combining atoms of elements gives rise to the strongest ionic bond?
A. Sodium and iodine
B. Sodium and chlorine
c. Sodium and bromine
D. Sodium and fluorine | 1 | Chemistry |
In an electromagnetic wave, the direction of the magnetic induction \( \vec{B} \)
is
A. parallel to the electric field \( \vec{E} \)
B. perpendicular to the electric field \( \vec{E} \)
C . antiparallel to the pointing vector \( \vec{S} \vec{S} \)
D. random | 3 | Physics |
In an ideal parallel LC circuit, the capacitor is charged by connecting it to a D.C. source which is then
disconnected. The current in the circuit
A. Becomes zero instantaneously
B. Grows monotonically
c. Decays monotonically
D. oscillates instantaneously | 3 | Physics |
The solution of \( \int_{\sqrt{2}}^{x} \frac{d t}{\sqrt{t^{2}-1}}=\frac{\pi}{12} \) is
A .
B. 2
\( c \cdot 3 \)
D. 4
E . 5 | 2 | Maths |
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