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Phosphate pollution is caused by:
A. weathering of phosphate rocks only
B. agriculatural fertilizers only
C . phosphate rocks and sewage
D. sewage and agricultural fertilizers
| 1 |
Chemistry
|
A 0.1 molal solution of a monobasic
acid is \( 45 \% \) ionized. Calculate the
depression in freezing point:
(Molecular weight of the acid \( =300 \)
\( \left.\mathrm{g} / \mathrm{mol}, \boldsymbol{K}_{f}=\mathbf{1 . 8 6} \boldsymbol{K} \boldsymbol{m o l}^{-1} \boldsymbol{k g}\right) \)
A \( .--0.199^{\circ} \mathrm{C} \)
B . \( 2.00^{\circ} \mathrm{C} \)
\( \mathrm{c} \cdot 0^{\circ} \mathrm{C} \)
D. \( 0.269^{\circ} \mathrm{C} \)
| 1 |
Chemistry
|
An object is thrown from the height of \( 125 \mathrm{cm} \) take \( \mathrm{g}=10 \mathrm{m} / \mathrm{s} \). Find the ratio of distance covered by object in the 1 st and last 1 sec
A . 1: 9
B. 4:
\( c \cdot 4: 4 \)
D. 2:
| 3 |
Physics
|
Which meristem does produce growth in length?
| 0 |
Biology
|
What mass of solid ammonium
carbonate \( \boldsymbol{H}_{2} \boldsymbol{N} \boldsymbol{C O O N} \boldsymbol{H}_{4}, \) when
vaporized at \( 273^{\circ} C, \) will have a volume
of 8.961 at \( 760 m m \) of pressure.
Assume that the solid completely
decomposes as
\( \boldsymbol{H}_{2} \boldsymbol{N} \boldsymbol{C O O N} \boldsymbol{H}_{4}(\boldsymbol{s}) \rightarrow \boldsymbol{C} \boldsymbol{O}_{2}(\boldsymbol{g})+ \)
\( \mathbf{2} \boldsymbol{N} \boldsymbol{H}_{3}(\boldsymbol{g}) \)
A . \( 15.6 g \)
в. \( 5.2 g \)
c. \( 46.8 g \)
D. \( 7.8 g \)
| 1 |
Chemistry
|
A person cannot clearly see objects farther than \( 12 \mathrm{m} \) from the eye. Name the defect in vision he is suffering from
and the lens that should be used to
correct this defect.
| 3 |
Physics
|
Major product of this reaction:
(A)
\( A \)
B.
\( c \)
D.
| 1 |
Chemistry
|
The measured mass and volume of a
body are \( 53.63 g \) and \( 5.8 \mathrm{cm}^{3} \) respectively, with possible errors of \( 0.01 g \) and \( 0.1 \mathrm{cm}^{3} . \) The
maximum percentage error in density is about:
A . \( 0.2 \% \)
в. \( 1.74 \% \)
c. \( 5 \% \)
D. \( 10 \% \)
| 3 |
Physics
|
If the ratio of lengths, radii and Young's modulus of steel and brass wires shown
in the figure are \( a, b \) and \( c \) respectively, the ratio between the increase in
lengths of brass and steel wires would
be :
A \( \cdot \frac{b^{2}}{2 c} \)
в. \( \frac{b c}{2 a^{2}} \)
\( c \cdot \frac{b a^{2}}{2 c} \)
D. \( \frac{2 b^{2} c}{a} \)
| 3 |
Physics
|
Find the acceleration of a particle placed on the surface of the earth at the equator due to the earth's rotation. The
diameter of the earth is \( 12800 \mathrm{km} \) and
it takes 24 hours for the earth to
complete one revolution about its axis.
| 3 |
Physics
|
The particle of mass \( m \) and charge \( q \) will touch the infinitely large plate of uniform charge density \( \sigma \) if its velocity \( v \) is more than:(Given that \( \sigma q>0 \) )
A . 0
в. \( \sqrt{\frac{4 \sigma q d}{m \varepsilon_{0}}} \)
c. \( \sqrt{\frac{\sigma q d}{m \varepsilon_{o}}} \)
D. none of these
| 3 |
Physics
|
The intensity of an electric field at some point distant \( r \) from the axis of infinity long pipe having charged per unit length as q will be:
A. Proportional to \( r^{2} \)
B. Proportional to \( r^{3} \)
c. inversely proportional to \( r \)
D. inversely Proportional to \( r^{2} \)
| 3 |
Physics
|
Complete the following equations:
(i) \( P_{4}+H_{2} O \rightarrow \)
(ii) \( \boldsymbol{X} \boldsymbol{e} \boldsymbol{F}_{4}+\boldsymbol{O}_{2} \boldsymbol{F}_{2} \rightarrow \)
| 1 |
Chemistry
|
In the given figure, find the area of the shade region. [use \( \pi=22 / 7 \text { ] [use } \pi=227] \)
| 2 |
Maths
|
In III group precipitation, \( N H_{4} C l \) is
added before adding \( N H_{4} O H \) to
A . Decrease conc. of \( O H^{-} \)
B. Prevent interference of \( P O_{4}^{3-} \)
c. Increase conc. of \( C l^{-} \)
D. Increase conc. of \( O H^{-} \) ion
| 1 |
Chemistry
|
PQRS is a parallelogram and PA, SB, RC,
QD are angle bisectors. If \( P Q=Q D=6 \)
units, find \( \boldsymbol{m} \angle \boldsymbol{P Q R} \)
\( A \cdot 30^{\circ} \)
B. 60
\( c \cdot 120 \)
D. Indeterminate
| 2 |
Maths
|
Which one of the following sets of quantum numbers represents the highest energy level in an atom?
B. \( n=3, l=1, m=1, s=+1 / 2 \)
c. \( n=3, l=2, m=-2, s=+1 / 2 \)
D. \( n=3, l=0, m=0, s=+1 / 2 \)
| 1 |
Chemistry
|
The efficiency of the heat engine is
A . 75\%
B. 33\%
c. 50\%
D. 25\%
E . \( 100 \% \)
| 3 |
Physics
|
Assertion
The electrical resistance of any object decreases with increase in its length.
Reason
Electrical resistance of any object
increases with increase in its area of
cross-section.
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
| 1 |
Chemistry
|
\( \boldsymbol{f}: \boldsymbol{N} \rightarrow \boldsymbol{N}-\{1,2,3\} \) defined by
\( \boldsymbol{f}(\boldsymbol{x})=\boldsymbol{x}+\mathbf{3} \) is
A. one-one only
B. onto only
c. bijective
D. neither one-one nor onto
| 2 |
Maths
|
Assertion
\( \boldsymbol{H}_{2}+\boldsymbol{O}_{2} \) fuel cell gives a constant
voltage throughout its life.
Reason
In this fuel cell, \( H_{2} \) reacts with \( O H^{-} \) ions, yet the overall concentration of
\( O H^{-} \) ions does not change.
A. assertion is true, reason is true; reason is correct explanation for assertion.
B. assertion is true, reason is true; reason is NOT a correct explanation for assertion
c. assertion is true, reason is false
D. assertion is false, reason is true
| 1 |
Chemistry
|
The alkali metal which acts as a
nutrient for plants is:
A. \( N a \)
в. \( K \)
\( c \cdot L i \)
D. \( R b \)
| 1 |
Chemistry
|
Choose the correct answer from the
alternatives given Hypothyroidism in children results in:
A. dwarfism
B. acromegaly
c. high blood pressure
D. high body temperature
| 0 |
Biology
|
Why do we apply paint on iron articles?
| 1 |
Chemistry
|
A chemical process in which a
substance reacts with oxygen to give off heat is called?
A . lgnition
B. Combustion
c. conduction
D. None of the above
| 1 |
Chemistry
|
According to the formula, what will be t
he number of plants two years from now if \( K=4000 \) (Round your answer to the
nearest whole number.)
| 2 |
Maths
|
Isotope of which metal is used in cancer therapy?
A . \( R a \)
в. \( N i \)
c. \( P_{o} \)
D. \( C o \)
| 1 |
Chemistry
|
The angle between magnetic meridian
and geographical meridian is known as:
A. magnetic dip
B. magnetic latitude
C. magnetic declination
D. magnetic longitude
| 3 |
Physics
|
How many moles of sodium chloride are
present in a sample that has a mass of \( 1.17 g ? \)
A. 0.005 mol
B. \( 0.01 \mathrm{mol} \)
c. 0.02 mol
D. 0.03 mol
| 1 |
Chemistry
|
The metallic cuboid \( 100 \mathrm{cm} \times 80 \mathrm{cm} \times \)
\( 64 \mathrm{cm} \) is recast into a cube. The surface
area of the cube is
A \( \cdot 19200 \mathrm{cm}^{2} \)
B. \( 31600 \mathrm{cm}^{2} \)
c. \( 38400 \mathrm{cm}^{2} \)
D. \( 25600 \mathrm{cm}^{2} \)
| 2 |
Maths
|
Prove that \( : \sin ^{-1}\left(\frac{5}{13}\right)+ \)
\( \cos ^{-1}\left(\frac{4}{5}\right)=\frac{1}{2} \sin ^{-1}\left(\frac{3696}{4225}\right) \)
| 2 |
Maths
|
If \( \boldsymbol{\alpha}, \boldsymbol{\beta}, \boldsymbol{\gamma} \) are in A.P. show that \( \cot \boldsymbol{\beta}= \)
\( \frac{\sin \alpha-\sin \gamma}{\cos \gamma-\cos \alpha} \)
| 2 |
Maths
|
Find the square root of the following number by factorisation.
\( \mathbf{1 1 5 6} \)
| 2 |
Maths
|
2.5 litre of \( 1 \mathrm{M} \) NaOH solution mixed
with another 3 litre of \( 0.5 ~ M \) NaOH
solution. Then find out molarity of resultant solution.
в. \( 1.0 \mathrm{M} \)
c. 0.73 М
D. \( 0.50 M \)
| 1 |
Chemistry
|
Zeroth law of thermodynamic signifies:
A . Mass
B. Heat
c. Temperature
D. Inertia
| 3 |
Physics
|
Find :
\( \int \frac{2}{(1-x)\left(1+x^{2}\right)} d x \)
| 2 |
Maths
|
A compound of platinum, ammonia and chlorine produces which complex
compound?
| 1 |
Chemistry
|
Prokaryotic cells are characterised by
A. Absence of nuclear envelope
B. Presence of nuclear envelope
C. Presence of distinct chromosome
D. Absence of chromatin material
| 0 |
Biology
|
Find the frequency of 1 MeV photon. Given wavelength of a \( 1 \mathrm{keV} \) photon is \( 1.24 \times 10^{-9} m \)
Hint: \( \boldsymbol{E}=\boldsymbol{h} \boldsymbol{\nu} \)
| 3 |
Physics
|
Assertion
It is hotter over the top of a fire than at the same distance of the sides.
Reason
Air surrounding the fire conducts more heat upwards.
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
|
In the following sequence of reactions, identify the end product (D). \( N a_{2} C O_{3} \stackrel{S O_{2}}{\rightarrow}(A) \stackrel{N a_{2} C O_{3}}{\longrightarrow}(B) \)
Elemental \( S, \Delta \)
\( (\boldsymbol{C}) \stackrel{\boldsymbol{I}_{2}}{\rightarrow}(\boldsymbol{D}) \)
A \( \cdot N a_{2} S O_{4} \)
в. \( N a_{2} S_{4} O_{6} \)
c. \( N a_{2} S \)
D. \( N a_{2} S_{2} O_{3} \)
| 1 |
Chemistry
|
In the following triplet pythagorean? show working (18,79,82)
| 2 |
Maths
|
A \( 10 \% \) solution of \( N a C l \) means that in
\( 100 g \) of solution there is:
A. \( 5.85 g \) NaCl
в. \( 58.5 g \) NaCl
c. \( 10 g \) NaCl
D. \( 94 g \) NaCl
| 1 |
Chemistry
|
For a solution of density, \( d \) in \( g / m \) containing solute of molecular weight \( W, \) the molarity \( M \) and molality \( m \) are
related by:
A \( \cdot \frac{d}{M}=\frac{1}{m}+\frac{W}{1000} \)
в. \( \frac{d}{m}=\frac{1}{M}+\frac{W}{1000} \)
c. \( \frac{W}{M}=\frac{1}{m}+\frac{d}{1000} \)
D. \( \frac{d}{m}=\frac{W}{M}+\frac{1}{1000} \)
| 1 |
Chemistry
|
An ellipse with centre (0,0) cuts y axis \( \operatorname{at}(0,6) \) and \( (0,-6) . \) If its \( e=\frac{\sqrt{3}}{2} \) then the length of major axis is:
A . 18
B. 36
c. 20
D. 24
| 2 |
Maths
|
Let \( R \) be a reflexive on a finite \( \operatorname{set} A \)
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. None of these
| 2 |
Maths
|
What are inter halogen compounds? Give one preparation.
| 1 |
Chemistry
|
The hormone that promotes rapid elongation of intermodes or leaf base in deep water rice plant is
A. Abscisic acid
B. Ethylene
c. cytokinin
D. Gibberellin
| 0 |
Biology
|
Assume that the potential energy of a hydrogen atom in its ground state is
zero. Then its total energy in the first
excited state will be:
A . \( 13.6 e V \)
в. 27.2eV
c. \( 23.8 e V \)
D. \( 10.2 e V \)
| 1 |
Chemistry
|
State whether the following statements
are true or false.
Climax indicates a final and stable community in a successional series
A. True
B. False
| 0 |
Biology
|
Number of elements in Lanthanide
family is:
| 1 |
Chemistry
|
In the figure \( Q-26 \) the potential at \( A \) is
when the potential at B is zero.
| 3 |
Physics
|
Two long thin conductors \( 10 \mathrm{cm} \) apart
carry currents in the ratio 1: 2 in the
same direction. The magnetic field
midway between them is \( 2 \times 10^{-3} \)
Tesla. The force on 1 metre length of any conductor will be :
\( \mathbf{A} \cdot 2 \pi \times 10^{-3} \) Newton
B. \( 2 \times 10^{-3} \) Newton
c. \( \pi \) Newton
D. 1 Newton
| 3 |
Physics
|
kg of \( _{\text {一一一一一一一一 }} \) can light up 1 bulb
for \( 3 \times 10^{4} \) years.
A. Uranium
B. Halonium
c. Neutronium
D. Hydronium
| 3 |
Physics
|
Which of the following system exchanges only energy but not matter?
B. close system
c. Isolated system
D. None of the above
| 3 |
Physics
|
Write a note on Haemoglobin.
| 1 |
Chemistry
|
The product \( ^{\prime} X^{\prime} \) on oxidation with
HIO gives:
This question has multiple correct options
A. \( H C H O \)
в. \( C H_{3}-C H O \)
\( c \cdot c o_{2} \)
D. \( H C O O H \)
| 1 |
Chemistry
|
The ratio of the maximum velocity and maximum displacement of a particle executing SHM is equal to
\( A \cdot n \)
B. \( g \)
c.
\( D . \)
| 3 |
Physics
|
Units of average rate of reaction is:
\( A \cdot \sec ^{-1} \)
B. mole sec \( ^{-1} \)
c. mole \( \mathrm{dm}^{-3} \mathrm{sec}^{-1} \)
D. unitless
| 1 |
Chemistry
|
If \( 3 y=y+2, \) calculate the value of \( 2 y \)
A .
B . 2
\( c \cdot 3 \)
D. 4
| 2 |
Maths
|
Figure shows a piece of semiconductor pure one) \( \mathrm{S} \) in series with a variable
resistors \( \mathrm{R} \) and a source of constant
voltage \( V . S \) is heated and the current is
kept constant by adjustment of R. Which of the following factors will decrease during the precess?
1. The drift velocity of the conduction electrons in S.
2. The DC resistors of \( S \)
3. The number of conduction electrons
in S.
A. Only 1
B. 1 and 2
c. \( 1,2, \) and 3
D. only
| 3 |
Physics
|
Voice is high pitched in
A. Ages persons
B. Adult males
c. Boys
D. Females
| 0 |
Biology
|
When less amounts of oxygen is present, carbon combines with it to give
gas.
A. carbon dioxide
B. carbon monoxide
c. carbonate
D. none of these
| 1 |
Chemistry
|
In an A.P., if the first term is 22 , the
common difference is -4 and the sum
to \( n \) terms is \( 64, \) find \( n \)
| 2 |
Maths
|
Find limits of the error when \( \frac{\mathbf{9 1 6}}{\mathbf{1 9 1}} \) is taken for \( \sqrt{\mathbf{2 3}} \)
| 2 |
Maths
|
Which of the following can be made into crystal?
A. Bacterium
B. Amoeba
c. virus
D. None of these
| 0 |
Biology
|
State the cause of dispersion of white light by a glass prism. How did Newton, using two identical glass prisms, show that white light is made of seven colors? Draw a ray diagram to show the path of a narrow beam of white light, through a combination of two identical primes arranged together in inverted position with respect to each other, when it is allowed to fall obliquely on one of the
faces of the first prism of the combination.
| 3 |
Physics
|
Calculate the given expression in the Kelvin scale
\( \frac{\left(24^{3}-21^{3}-3 \times(24)^{2}(21)+3 \times 24 \times\right.}{27} \)
where all numbers are in Celsius scale.
A. 300 к
B. 274 к
c. 282 к
D. 273 к
| 1 |
Chemistry
|
Select the correct statements with
reference to pheretima (excretory system)
A) Nephridia help in excretion and osmoregulation
B) Septal nephridia collects the wastes from coelomic fluid with the help of
nephrostomes
C) Integumentary nephridia discharge waste materials to the outer body surface through the nephridiopores
D) Septal nephridia and pharyngeal nephridia discharge wastes into luman of gut.
A. \( A, B, C \)
в. \( B, C, D \)
c. \( A, C, D \)
D. \( A, B, C, D \)
| 0 |
Biology
|
To which of the following category does ice-cream belong?
A. Solution
B. Emulsion
c. Element
D. Suspension
| 1 |
Chemistry
|
A uniform thin circular ring of mass 'M' and radius 'R' is rotating about its fixed axis, passing through its centre and perpendicular to its plane of rotation, with a constant angular velocity \( \omega . \) Two objects each of mass \( \mathrm{m}, \) are attached
gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity of :
A \( \cdot \frac{\omega M}{(M+m)} \)
в. \( \frac{\omega M}{(M+2 m)} \)
c. \( \frac{\omega M}{M-2 m} \)
D. \( \frac{\omega(M+3 m)}{M} \)
| 3 |
Physics
|
The bodies of different masses \( m_{a} \) and
\( m_{b} \) are dropped from two different
heights i.e., a and b. The ratio of time taken by both bodies to drop through these distance is :
A \( \cdot \sqrt{a}: \sqrt{b} \)
В \( \cdot \frac{m_{a}}{m_{b}}: \frac{b}{a} \frac{b}{a} \)
\( c \cdot a: b \)
\( \mathbf{D} \cdot a^{2}: b^{2} \)
| 3 |
Physics
|
Cells are the basic structural units of
living organisms'. Explain.
| 0 |
Biology
|
Which of the following is correct?
A. The value of \( g \) is constant throughout
B. \( g \propto \frac{1}{r^{2}} \)
C \( . g \) is slightly less (by about \( 1 \% \) ) when distance \( <200 m \)
D. \( g \) is slightly greater when distance \( <200 m \)
| 3 |
Physics
|
Check whether 7,49,343 are in
continued proportion or not
| 2 |
Maths
|
An equilateral triangle has area \( A \mathrm{cm}^{2} \) A regular hexagon of maximum area is cut off from the triangle. If the area of
the hexagon is \( 320 \mathrm{cm}^{2} \), then the area \( A \)
is
A \( \cdot 640 \mathrm{cm}^{2} \)
в. \( 480 \mathrm{cm}^{2} \)
\( c \cdot 600 c m^{2} \)
D. \( 400 \mathrm{cm}^{2} \)
| 2 |
Maths
|
Which of the following set of reaction
\( R-C-O H \) as the can not prepare
final product?
A \( \cdot R-M g X+O=C=O \frac{d r y \cdot e t h e r}{\longrightarrow} A \frac{H_{3} O^{+}}{\longrightarrow} \)
в. \( R-C N \frac{S n\left(l_{2}+H C l\right.}{(i i) H_{2} O / H^{+}} \)
\( c \)
D. \( C H_{3}\left(C H_{2}\right)_{8} C H_{2} O H \frac{C r O_{3}}{H_{2} S O_{4}} \)
| 1 |
Chemistry
|
A car increases its speed from 20 km /
to \( 50 k m / h \) in 10 seconds. Its
acceleration is
A \( \cdot 30 m s^{-2} \)
B . \( 3 m s^{-2} \)
\( \mathrm{c} \cdot 18 \mathrm{ms}^{-2} \)
D. None of these
| 3 |
Physics
|
A machine gun is mounted on the top of
a tower 100 m high. At what angle
should the gun be inclined to cover a maximum range of firing on the ground below? The muzzle speed of bullet is \( 150 m s^{-1} . \) Take \( g=10 m s^{-2} \)
| 3 |
Physics
|
Foramen of Panizza is associated with
A. Brain of reptiles
B. Brain of rabbit
c. Lung of lizardd
D. Heart of crocodile
| 0 |
Biology
|
Abhay made a straight cut through a circular rubber band and then laid the
rubber band flat, as shown in the figure.
Which measure corresponds to the
length of the cut rubber band?
A. Chord
B. Circumference
c. Diameter
D. Radius
| 2 |
Maths
|
\( 4 L \) of \( 0.02 M \) aqueous solution of \( N a C l \)
was diluted by adding \( 1 L \) of water. The
molarity of the resultant solution is:
\( \mathbf{A} \cdot 0.004 \)
B. 0.008
c. 0.012
D. 0.016
| 1 |
Chemistry
|
If \( \lim _{x \rightarrow-2} \frac{x^{p}+2^{p}}{x+2}=80 \) (where \( p \) is an odd
number), then \( p \) can be
\( A \cdot 3 \)
B. 5
\( c \cdot 7 \)
D. 9
| 2 |
Maths
|
The given compound is:
A. E form
B. Z form
C. Both of these
D. None of these
| 1 |
Chemistry
|
Most widely accepted theory of carbohydrate translocation is
A. Mass flow theory
B. Root pressure theory
c. Imbibition theory
D. Transpiration theory
| 0 |
Biology
|
Large crystals of pure substances can be formed from their solutions during
A. crystallization
B. evaporation
c. expansion
D. contraction
| 1 |
Chemistry
|
Calculate the induced emf in the loop if
the current in both the wires is
changing at the rate \( \boldsymbol{d} \boldsymbol{i} / \boldsymbol{d} \boldsymbol{t} \)
| 3 |
Physics
|
\( p^{3}-(p+1)^{3}=? \)
\( \mathbf{A} \cdot-3 p^{2}-3 p+1 \)
B \( .-3 p^{2}-3 p-1 \)
\( \mathbf{c} \cdot-3 p^{2}+3 p+1 \)
D. \( -3 p^{2}+3 p-1 \)
| 2 |
Maths
|
Lauryl alcohol on treatment with
\( H_{2} S O_{4} \) followed by neutralisation forms a product which is:
A. cationic detergent
B. anionic detergent
c. neutral detergent
D. antidepressant
| 1 |
Chemistry
|
A letter is known to have come eithe
from London or Clifton; on the post only the consecutive letters ON are legible; what is the chance that it came from
London?
A \( \cdot \frac{12}{17} \)
в. \( \frac{5}{17} \)
c. \( \frac{5}{12} \)
D. \( \frac{7}{12} \)
| 2 |
Maths
|
The fruity smell is of a/an:
A. aldehyde
B. ketone
c. alcoho
D. ester
| 1 |
Chemistry
|
A bar magnet is \( 10 \mathrm{cm} \) long is kept with its north (N)-pole pointing north. A neutral point is formed at a distance of \( 15 \mathrm{cm} \) from each pole:Given the horizontal component of earth's field is 0.4 Gauss, the pole strength of the magnet is
\( A \cdot 9 A-m \)
B. 6.75 A-m
c. 27 A-m
D. 1.35 A-m
| 3 |
Physics
|
Biogas plant is more useful than burning of dung cakes because
A. It is non-pollutant
B. It yields manure as well as fuel gas.
c. It yields important biochemicals.
D. Both A and B
| 0 |
Biology
|
The steam roller is a cylinder \( 56 \mathrm{cm} \) in
diameter and \( 120 \mathrm{m} \) in length,what are
of the road will it cover in 100
revolutions?
| 2 |
Maths
|
An open tank with a square base and
vertical side is to be constructed a
metal sheet so as to hold a given quantity of water. Show that the cost of the material will be least when depth of
the tank is half of its width.
| 2 |
Maths
|
Sound travels faster in gases when compared to solids and liquids.
| 3 |
Physics
|
For the reaction \( 2 N H_{3} \rightarrow N_{2}+3 H_{2} \)
\( \mathbf{f}-\frac{\boldsymbol{d}\left[\boldsymbol{N} \boldsymbol{H}_{3}\right]}{\boldsymbol{d} t}=\boldsymbol{k}_{1}\left[\boldsymbol{N} \boldsymbol{H}_{3}\right], \frac{\boldsymbol{d}\left[\boldsymbol{N}_{2}\right]}{\boldsymbol{d} t}= \)
\( \boldsymbol{k}_{2}\left[\boldsymbol{N} \boldsymbol{H}_{3}\right], \frac{\boldsymbol{d}\left[\boldsymbol{H}_{2}\right]}{\boldsymbol{d} t}=\boldsymbol{k}_{3}\left[\boldsymbol{N} \boldsymbol{H}_{3}\right] \)
then the relation between \( k_{1}, k_{2} \) and \( k_{3} \)
is?
\( \mathbf{A} \cdot k_{1}=k_{2}=k_{3} \)
B. \( k_{1}=3 k_{2}=2 k_{3} \)
c. \( 1.5 k_{1}=3 k_{2}=k_{3} \)
D \( \cdot 2 k_{1}=k_{2}=3 k_{3} \)
| 1 |
Chemistry
|
Find the \( 20^{t h} \) term and \( n^{t h} \) term of the
following G.P.5, 25, 125,....
| 2 |
Maths
|
The sum of the series
\( \sum_{r=1}^{n}(-1)^{r-1} \cdot^{n} C_{r}(a-r) \) is
\( A \)
B.
c. \( n .2^{n-1}+a \)
D. None of these
| 2 |
Maths
|
\( 1^{s t} \) law of thermodynamics is not adequate in presenting the direction of
process.
A. True
B. False
| 1 |
Chemistry
|
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