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In the given figure
\[
\angle Q R N=40^{\circ}, \angle P Q R=46^{\circ} \text { and } M N
\]
is a tangent at \( R \). What is the value
\( (\text {in degrees}) \)of \( \mathbf{x}, \) y and z respectively?
\( M \)
\[
\frac{y_{z}}{R} 40^{46^{\circ}}
\]
| 2 |
Maths
|
The hybridization of \( X e \) in \( X e F_{2} \) is:
\( A \cdot s p^{3} \)
B \( \cdot s p^{2} \)
\( \mathrm{c} \cdot s p^{3} d \)
D. \( s p^{3} d^{2} \)
| 1 |
Chemistry
|
This is not a part of the ear.
A. humerus
B. cochlea
c. labyrinth
D. stapes
| 3 |
Physics
|
In the circuit shown, the effective
capacitance between points \( X \) and \( Y \) is
\( A \cdot 3.33 \mu F \)
В. \( 1 \mu F \)
\( c .0 .44 \mu F \)
D. none of these
| 3 |
Physics
|
The ratio of the secondary to the primary turns in a transformer is 3: 2
and the output power is \( P . \) Neglecting
all power losses, the input power must be
A \( \cdot \frac{2 P}{3} \)
в. \( \frac{3 P}{2} \)
c. \( \frac{P}{2} \)
D. \( P \)
| 3 |
Physics
|
Write balanced chemical equations to
show:
The oxidizing action of conc. Sulphuric acid on Carbon.
| 1 |
Chemistry
|
\( F e^{3+} \) oxidises \( N H_{2} O H \) to
A \( \cdot N O_{2} \)
в. \( N_{2} \),
c. \( N_{2} \)
D. \( N_{3} \)
| 1 |
Chemistry
|
In \( \triangle \mathrm{PQR}, \mathrm{M} \) and \( \mathrm{N} \) are points on sides PQ and PR respectively such that PM = \( 15 \mathrm{cm} \) and \( \mathrm{NR}=8 \mathrm{cm} . \) If \( \mathrm{PQ}=25 \mathrm{cm} \) and
\( P R=20 \mathrm{cm} \) state whether MN \( \| \mathrm{QR} \)
| 2 |
Maths
|
Find \( \frac{\boldsymbol{d} \boldsymbol{y}}{\boldsymbol{d} \boldsymbol{x}} \)
if \( \boldsymbol{y}=(\sin \boldsymbol{x})^{\boldsymbol{x}}+\sin ^{-1} \sqrt{\boldsymbol{x}} \)
| 2 |
Maths
|
The adjoining diagram shows the
energy levels for an electron in a certain,
which transition shown represents the
emission of a photon with the maximum energy
\( A \)
B. I
c. III
D. IV
| 3 |
Physics
|
Position \( x \) of a particle moving along a straight line with time \( t \) is given by \( x= \) \( \sqrt{t^{2}+2} . \) Acceleration of the particle is
given by.
A. \( \frac{1}{x^{3}} \)
в. \( \frac{2}{x^{3}} \)
c. \( \frac{1}{x}-\frac{t^{2}}{x^{2}} \)
D. \( \frac{1}{x}-\frac{t^{2}}{x} \)
| 3 |
Physics
|
Given, \( \vec{\omega}=2 \hat{k} \) and \( \vec{r}=2 \hat{i}+2 \hat{j} . \) Find the linear velocity.
A \( \cdot 4 \hat{i}+4 \hat{j} \)
B - \( 4 \hat{i}-4 \hat{k} \)
\( \mathbf{c} \cdot_{-4 \hat{i}+4 \hat{j}} \)
D. \( -4 \hat{i}-4 \hat{j} \)
| 3 |
Physics
|
If \( a^{2}=b^{2}+b c \) then \( b+c \) always equals
A \( \cdot \frac{a^{2}}{b} \)
в. \( \frac{1}{2} b c \)
\( c \cdot 1 \)
D. \( b c \)
| 2 |
Maths
|
The correct order of atomic size of Na,
Be and Mg is:
\( A \cdot B e>M g>N a \)
в. \( \mathrm{Na}>\mathrm{Mg}>\mathrm{Be} \)
c. \( \mathrm{Mg}>\mathrm{Na}>\mathrm{Be} \)
D. \( N a=M g>B e \)
| 1 |
Chemistry
|
Cotrell precipitator works on the
principle of:
A. distribution law
B. addition of electrolyte
C. neutralisation of charge on colloids
D. Le Chatelier's principle
| 1 |
Chemistry
|
Two satellites of identical masses orbit
the earth at different heights. The ratio of their distances from the centre of
earth is \( d: 1 \) and the ratio of the
acceleration due to gravity at those height is \( g: 1 . \) Then find the ratio of their orbital velocities.
A \( \cdot \sqrt{\frac{g}{d}} \)
B. \( \sqrt{g d} \)
\( \mathrm{c} \cdot \sqrt{g} \)
D. \( \sqrt{g} d \)
| 3 |
Physics
|
Find the focal length of a convex lens, if its power is \( +2.0 \mathrm{D} \)
A. \( 0.5 \mathrm{m} \)
B. -0.5 m
\( c \cdot 1 m \)
D. -1 m
| 3 |
Physics
|
IUPAC name of the compound is:
A. 2 -methylbenzoic acid
B. 3-methyl benzenecarboxilic acid
c. 2 -methylbenzeneoic acid
D. 3-methylbenzoic acid
| 1 |
Chemistry
|
Which of the following postulate can be used to prove \( \Delta K L M \) and \( \Delta R S T \) are similar?
This question has multiple correct options
A . AAS
B. sss
c. sas
D. AAA
| 2 |
Maths
|
The speed of sound in a gas is given by \( \boldsymbol{v}=\sqrt{\frac{\gamma \boldsymbol{R} \boldsymbol{T}}{\boldsymbol{M}}} \)
\( R= \) universal gas constant
\( \boldsymbol{T}= \) temperature
\( M= \) molar mass of gas The dimensional formula of \( \gamma \) is
\( \mathbf{A} \cdot\left[M^{0} L^{0} T^{0}\right. \)
B . \( \left[M^{0} L T^{-1}\right] \)
\( \mathbf{c} \cdot\left[M L T^{-2}\right] \)
D \cdot \( \left[M^{0} L^{0} T^{-1}\right] \)
| 3 |
Physics
|
Assertion: Paramagnetic substances get weakly attracted to a magnet. Reason : They have tendency to move from a region of strong magnetic field to weak magnetic field
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true and reason is not the correct explanation of assertion
c. If assertion is true but reason is false
D. If both assertion and reason are false
| 3 |
Physics
|
The derivative of the function \( f(x)= \) \( \sqrt{x^{2}-2 x+1} \) in the interval [0,2] is
A . -1
B.
\( c \cdot 0 \)
D. does not exist
| 2 |
Maths
|
Factorize \( \left(1+\frac{1}{x}+\frac{1}{x^{2}}+\frac{1}{x^{3}}\right) \)
| 2 |
Maths
|
Cluster of molecules in which the
hydrophobic tails are in the interior of the clusterand the ionic ends are on the
surface of the cluster, are called:
A . scum
B. micelles
c. colloids
D. emulsion
| 1 |
Chemistry
|
In a parallel RC circuit, there is \( 100 m A \)
through the resistive branch and
100 \( m A \) through the capacitive branch.
The total rms current is
A \( .200 m A \)
в. \( 100 \mathrm{mA} \)
\( c .282 m A \)
D. \( 141 m A \)
| 3 |
Physics
|
What happens to the fringe pattern, if in the path of one of the slits a glass plate which adsorbs \( 50 \% \) energy is interposed?
A. brightness of fringes will decrease but the dark fringe will become brighter
B. No fringes are observedd
c. The frings width decrease
D. None of the above
| 3 |
Physics
|
The laws of reflection are true for:
A. the plane mirror only
B. the concave mirror only
C. the convex mirror only
D. all reflecting surfaces
| 3 |
Physics
|
What is the other name of Galileo's law
of falling bodies?
A. Law of motion
B. Newton's first law
c. Newton's second law
D. Newton's third law
| 3 |
Physics
|
Density of vitreous humour is equal to the?
A. Air
B. water
c. Lens
D. None of these
| 0 |
Biology
|
Nitrites and nitrates are added to food
to keep meat red for a longer time but
there are harmful effects. What are
these harmful effects?
| 1 |
Chemistry
|
The D.E whose solution is \( y=a x^{3}+b x^{2} \)
is
A \( \cdot x^{2} y_{2}-4 x y_{1}+6 y=0 \)
B . \( x^{2} y_{2}-4 y_{1}+6 y=0 \)
c. \( x^{2} y_{2}+4 x y_{1}-6 y=0 \)
D. \( x^{2} y_{2}-2 x y_{1}+6 y=0 \)
| 2 |
Maths
|
Probability is 0.45 that a dealer will sell
at least 20 television sets during a day, and the probability is 0.74 that he will
sell less that 24 televisions. The
probability that he will sell 20,21,22 or
23 televisions during the day, is
A . 0.19
в. 0.32
c. 0.21
D. None of these
| 2 |
Maths
|
How many words can be formed from the word "BHARAT"
A . 360
B. 180
\( c \cdot 90 \)
D. 45
| 2 |
Maths
|
Integrate the function \( \tan ^{-1}(\sqrt{\frac{1-\sin x}{1+\sin x}}) \) w.r.t d \( x \)
| 2 |
Maths
|
Which of the following is the correct value of \( \boldsymbol{R} \) in \( \boldsymbol{S} \boldsymbol{I} \) units?
A. 0.083 bar \( d m^{3} K^{-1} m o l^{-1} \)
-
B. 1.98 calK\( ^{-1} \)mol\( ^{-1} \)
c. \( 8.314 \times 10^{7} \) ergK\( ^{-1} \) mol \( ^{-1} \)
D. \( 8.314 J K^{-1} m o l^{-1} \)
| 1 |
Chemistry
|
Which of the following units is correctly
matched?
A. SI units of conductivity is \( S m^{-1} \)
B. \( S I \) units of molar conductivity is \( S \mathrm{cm}^{2} \mathrm{mol}^{-1} \)
c. \( S I \) unit of conductance is \( S^{-1} \)
D. All of these
| 1 |
Chemistry
|
In the decomposition of oxalic acid following data were obtained.
\[
\begin{array}{lcc}
\text { Time (second) } & 0 & 300 \\
\text { Volume of } K M n O_{4} & 22.0 & 17.0
\end{array}
\]
used in \( \mathrm{mL} \)
If reaction obeys 1 st order kinetics then
determine the rate constant K and half-
life period:
A \( \cdot 8.43 \times 10^{-4} \) sec \( , 13.7 \) minute
B . \( 86 \times 10^{-4} \) sec \( , 134.3 \) minute
c. \( 8.6 \times 10^{-5} \) sec \( , 1.343 \) minute
D. None of these
| 1 |
Chemistry
|
The matter-wave picture of electromagnetic wave/radiation elegantly incorporated the:
A. Heinsenbergs uncertainty principle
B. correspondence principle
c. cosmic theory
D. Hertzs observations
| 3 |
Physics
|
There are 15 buses running between two
towns. In how many ways can a man go
to one town and return by a different bus?
| 2 |
Maths
|
All gasses deviate from gas laws at
A. high pressure and low temperature.
B. low pressure and high temperature.
C. high pressure and high temperature.
D. low pressure and low temperature.
| 3 |
Physics
|
The angle of intersection between the
curves \( \boldsymbol{x}^{2}=\mathbf{4}(\boldsymbol{y}+\mathbf{1}) \) and \( \boldsymbol{x}^{2}=-\mathbf{4}(\boldsymbol{y}+ \)
1) is.
A \( \cdot \frac{\pi}{6} \)
B. \( \frac{\pi}{4} \)
c. 0
D.
| 2 |
Maths
|
Which of the following reaction shows
reduction of water?
A \( \cdot 2 H_{2} O+2 N a \rightarrow 2 N a O H+H_{2} \)
B \( \cdot 6 C O_{2}+12 H_{2} O \rightarrow C_{6} H_{1} 2 O_{6}+6 H_{2} O+6 O_{2} \)
\( \mathbf{c} \cdot 2 F_{2}+2 H_{2} O \rightarrow 4 H^{+}+4 F^{-}+O_{2} \)
D. \( P_{4} O_{1} 0+6 H_{2} O \rightarrow 4 H_{3} P O_{4} \)
| 1 |
Chemistry
|
Assertion
For a particular reaction, heat of
combustion at constant pressure \( \left(\boldsymbol{q}_{\boldsymbol{P}}\right) \)
is always greater than that at constant
volume \( \left(\boldsymbol{q}_{V}\right) \)
Reason
Combustion reactions are invariably
accomplished by increase in number of
moles.
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
|
\begin{tabular}{l|l|l}
List & \multicolumn{1}{l} { List } \\
I & II \\
A. & A dusting of a carpet & Inertia of direction \\
B. & Provided with a mudguard & Inertia of motion \\
C. & Fan continues to rotate after switching off & Measure of inertia \\
\hline D. & Mass & Inertia of rest
\end{tabular}
\( \mathbf{A} \)
\( A-(4) ; B-(1) ; C-(3) ; D-(2) \)
\( \mathbf{B} \)
\( A-(4) ; B-(1) ; C-(2) ; D-(3) \)
C \( \cdot A-(4) ; B-(2) ; C-(1) ; D-(3) \)
D. \( A-(1) ; B-(4) ; C-(2) ; D-(3) \)
| 3 |
Physics
|
In the given figure, the work done in taking the charge q from M to N is
\( \mathbf{A} \cdot \frac{2 k q Q}{a} \)
B. \( \frac{2 \sqrt{2} k q Q}{a} \)
c. \( \frac{\sqrt{2} k q Q}{a} \)
D. zer
| 3 |
Physics
|
Solve:
\( \int \frac{2 x+1}{\left(x^{2}-1\right)} d x \)
| 2 |
Maths
|
One mole of an ideal gas in initial state
A undergoes a cyclic process \( A B C A, \) as
shown in the figure. Its pressure at \( A \) is
\( P_{0} . \) Choose the correct option(s) from
the following.
This question has multiple correct options
A. Internal energies at A and B are the same
B. Work done by the gas in process AB is \( P_{o} V_{o} \) In 4
c. pressure at \( c \) is \( \frac{P_{o}}{4} \)
D temperature at \( C \) is \( \frac{T_{o}}{4} \)
| 3 |
Physics
|
Convert \( 3 \frac{5}{6} \) into an improper fraction.
| 2 |
Maths
|
Give two differences between D.N.A. and
R.N.A.
| 1 |
Chemistry
|
The IUPAC name for the compound is:
A. 2-acetyl prop-1-ene
B. pent-1-en-4-one
c. Pent-4-en-2-one
D. formyl propene
| 1 |
Chemistry
|
Light : Ray : : Sound : ?
A. Hear
B. wave
c. Audio
D. Pitch
| 3 |
Physics
|
The diagram shows the changes in
state of water \( \left(H_{2} O\right) . \) What is the
process X called:
A. Melting
B. Freezing
c. Boiling
D. Evaporation
| 1 |
Chemistry
|
The acceleration of an electron in the
first orbit of the hydrogen atom \( (\boldsymbol{n}=\mathbf{1}) \)
is :
A \( \cdot \frac{h^{2}}{\pi^{2} m^{2} r^{3}} \)
B. \( \frac{h^{2}}{8 \pi^{2} m^{2} r^{3}} \)
c. \( \frac{h^{2}}{4 \pi m^{2} r^{3}} \)
D. \( \frac{2 \pi^{2} k m e^{2} Z}{\eta h} \)
| 3 |
Physics
|
Evaluate the following:
\( \left|\begin{array}{ccc}1 & a & b c \\ 1 & b & c a \\ 1 & c & a b\end{array}\right| \)
| 2 |
Maths
|
The fuel formed by the marine animal and plant remnants is :
A. Petroleum
B. Electricity
c. Biogas
D. coal
| 3 |
Physics
|
If \( 50 \mathrm{N} \) force is applied on a liquid and it
experiences \( 25 N / m^{2} \) pressure. Find
out the area on which the force is
applied?
| 3 |
Physics
|
Our body irritates if it comes in contact with jelly fish. Give reasons.
| 0 |
Biology
|
Number of lone pair of electrons present
on the central atom of \( N O_{2}^{-} \) ion is?
A. zero
B. 1
\( c \cdot 2 \)
D. 3
| 1 |
Chemistry
|
The contrapositive of \( \boldsymbol{p} \rightarrow(\sim \boldsymbol{q} \rightarrow \sim \boldsymbol{r}) \)
is equivalent to
\( \mathbf{A} \cdot(\sim q \wedge r) \rightarrow \sim p \)
В \( \cdot(q \wedge \sim r) \rightarrow \sim p \)
c. \( p \rightarrow(\sim r \vee q) \)
D. \( p \wedge(q \vee r) \)
| 2 |
Maths
|
Due to low atmospheric pressure, the rate of transpiration will
A. Decrease slowly
B. Decrease rapidly
c. Increase
D. Remain unaffected
| 0 |
Biology
|
\( \lim _{x \rightarrow 0} \frac{2 \sin x-\sin 2 x}{x^{3}} \) is equal to :
| 2 |
Maths
|
Displacement versus time curve for a
particle executing SHM is as shown in
figure.
At what points the velocity of the
particle is zero?
\( A \cdot A, C, E \)
B. В, D, F
\( c \cdot A, D, F \)
D. \( \mathrm{C}, \mathrm{E}, \mathrm{F} \)
| 3 |
Physics
|
Find the rate percent, if the S.I on Rs 275 in 2 years is Rs 22.
| 2 |
Maths
|
If \( \mathrm{KE} \) of a given particle is doubled, its momentum will be:
A. Doubled
B. Tripled
C. Increases by \( \sqrt{2} \) times
D. Remains unchangedd
| 3 |
Physics
|
Suppose a pure \( \boldsymbol{S} \boldsymbol{i} \) crystal has \( \boldsymbol{5} \times \)
\( 10^{28} \) atoms \( m^{-3} . \) It is doped by 1 ppm
concentration of pentavalent \( \boldsymbol{A} \boldsymbol{s} \)
Calculate the number of electrons and
holes. Given that \( n_{i}=1.5 \times 10^{16} m^{-3} \)
| 3 |
Physics
|
The equation of the diameter of circle \( x^{2}+y^{2}+2 x-4 y-11=0 \) which
bisects the chords intercepted on the line \( 2 x-y+3=0 \) is
A. \( x+y-7=0 \)
В. \( 2 x-y-5=0 \)
c. \( x+2 y-3=0 \)
D. None of these
| 2 |
Maths
|
The floating roots in water absorbs the
air from
A. Dissolved oxygen in water
B. Dissolved oxygen in soil
c. Stomata
D. None of the above
| 0 |
Biology
|
Discuss the causes and effects of
global warming. What measure need to be taken to control global warming?
| 0 |
Biology
|
Order of \( \frac{1}{8 \times 10^{9}} \) is:
\( \mathbf{A} \cdot 1.77 \times 10^{-10} \)
B \( .1 .25 \times 10^{-10} \)
C \( .1 .55 \times 10^{-10} \)
D. \( 1.95 \times 10^{-10} \)
| 3 |
Physics
|
If \( \frac{x+a}{2}=b \cot ^{-1}(b \ln y), b>0, \) then
value of \( \boldsymbol{y} \boldsymbol{y}^{\prime \prime}+\boldsymbol{y} \boldsymbol{y}^{\prime} \ln \boldsymbol{y} \) equals
A \( \cdot y^{\prime} \)
B . \( y^{\prime} \)
\( c \cdot 0 \)
D.
| 2 |
Maths
|
Which one of the following is not a common component of Photochemical Smog?
A. Ozone
B. Acrolein
c. Peroxyacetyl nitrate
D. chloroflurocarbons
| 1 |
Chemistry
|
A substance \( X \) on heating gives \( Y \) and \( Z \) What is \( X ? \) Is it an element or a
compound? State two differences between an element and a compound. \( (1+1=2 \text { marks }) \)
| 1 |
Chemistry
|
Examine the data showing the percent identity of the GAPDH gene and protein sequences between humans and the
three species shown below.
Species G
lo \( \begin{array}{ll}\text { Gene } & \text { Protein } \\ \text { ldentity } & \text { ldentity }\end{array} \)
99.6\% \( \quad 100 \% \) Chimpanzee
Fruit Fly 72.4\% 76.7\%
Roundworm \( 68.2 \% \) 74.3\%
Provide a possible reason for why the percent identity between gene sequences is lower than the percent identity of protein sequences.
A. Multiple codons code for the same amino acid
B. Introns are likely to have different sequences.
c. Differences in DNA sequences are edited when the mRNA is transcribed
D. Amino acids cannot be substituted without consequence
| 0 |
Biology
|
The probability that Chakri passes in mathematics is \( \frac{2}{3} \) and the probability that he passes in English is \( \frac{4}{9} . \) If the probability of passing both courses is \( \frac{1}{4}, \) then the probability that Chakri wil pass in at least one of these subjects is \( \mathbf{3 1} \)
立 \( \overline{\mathbf{3 6}} \)
A . True
B. False
c. Ambiguous
D. Data Insufficient
| 2 |
Maths
|
Find a unit vector in the direction of the
vector \( \overrightarrow{\boldsymbol{a}}=\hat{\boldsymbol{i}}+\mathbf{2} \hat{\boldsymbol{j}}+\mathbf{3} \hat{\boldsymbol{k}} \)
| 3 |
Physics
|
(Kinetics/lonic equilibrium) studies of reactions involve molecular
reactions.
| 1 |
Chemistry
|
In an isosceles \( \triangle A B C \) is the \( A B=A C \)
\( D \) and \( E \) are points on \( B C \) such that
\( B E=C O \) show that \( A D=A E \)
| 2 |
Maths
|
\( \ln \operatorname{an} \mathrm{L}-\mathrm{C} \) circuit \( \boldsymbol{L}=\mathbf{0 . 7 5} \boldsymbol{H} \) and \( \boldsymbol{C}= \)
\( 18 \mu F . \) At the instant when the current
in the inductor is changing at a rate of \( 3.40 A / s, \) what is the charge on the capacitor?
A \( .45 .9 \mu C \)
B. \( 15.9 \mu C C \)
\( c .55 .9 \mu C \)
D. \( 35.9 \mu C \)
| 3 |
Physics
|
Disease caused by eating fish found in water contaminated with industrial
waste having mercury is:
A. minamata disease
B. brights disease
c. hashimotos disease
D. osteosclerosis
| 1 |
Chemistry
|
Is there ever an instant when the
velocity is \( 0 ? \) If \( s o, \) give the time.
A . \( 1.5 s \)
B . \( 2 s \)
\( c .3 s \)
D. \( 6 s \)
| 3 |
Physics
|
What are artificial Sweetening agents?
Give one example
| 1 |
Chemistry
|
In chickens, the female is the homogametic sex.
A. True
B. False
| 0 |
Biology
|
Which ion produces a small crystal field splitting (a weak ligand field)?
\( \mathbf{A} \cdot I^{-} \)
в. \( C I^{-} \)
\( c \cdot F^{-} \)
D. All of the above
| 1 |
Chemistry
|
Which of the following is/are examples of pseudo unimolecular reactions?
This question has multiple correct options
\( \mathbf{A} \cdot C H_{3} C O_{2} C_{2} H_{5}+H_{2} O \stackrel{H}{\rightarrow} C H_{3} C O_{2} H+C_{2} H_{5} O H \)
\( ^{\mathbf{B}} \cdot C_{12} H_{22} O_{11}+H_{2} O \stackrel{H}{\rightarrow}^{\oplus} \quad \begin{array}{ll}C_{6} H_{12} O_{6} & =C_{6} H_{12} O_{6} \\ & (G l u \operatorname{cose})\end{array}=\quad(\text {Fructose}) \)
\( \mathbf{c} \cdot C H_{3} C O C l+H_{2} O \rightarrow C H_{3} C O_{2} H+H C l \)
\( \mathrm{D} \cdot \mathrm{CH}_{3} \mathrm{CO}_{2} \mathrm{C}_{2} \mathrm{H}_{5}+\mathrm{H}_{2} \mathrm{O} \stackrel{\mathrm{OH}}{\rightarrow} \mathrm{CH}_{3} \mathrm{CO}_{2} \mathrm{H}+\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH} \)
| 1 |
Chemistry
|
Draw a sectional view of the human
heart and label the aorta, right ventricle,
and veins.
| 0 |
Biology
|
State and Explain Law of Multiple Proportions with the help of an example.
| 1 |
Chemistry
|
The time period of a simple harmonic motion is \( 8 s . \) At \( t=0, \) it is at its
equilibrium position. The ratio of distances transversed by it in the first and second seconds is:
A \( \cdot \frac{1}{\sqrt{2}} \)
в. \( \frac{1}{\sqrt{2}-1} \)
c. \( \frac{1}{\sqrt{3}} \)
D. \( \frac{1}{2} \)
| 3 |
Physics
|
The number of carbon atoms in Buckminsterfullerene is:
A . 50
B. 350
\( c \cdot 60 \)
D. 70
| 1 |
Chemistry
|
Charles's law is represented
mathematically as (symbols have their usual meanings)
\( \mathbf{A} \cdot V_{t}=K V_{o} t \)
в. \( v_{A}=\frac{K V_{o}}{t} \)
c. \( v_{t}=V_{o}\left(1+\frac{273}{t}\right) \)
D. \( V_{t}=V_{o}\left(1+\frac{t}{273}\right) \)
| 1 |
Chemistry
|
A graph of volume of hydrogen released
vs time for the reaction between zinc
and dil. \( H C l \) is given in figure. On the
basis of this mark the correct option.
' Average rate upto 40 seconds is \( \frac{V_{3}-V_{2}}{40} \)
B. Average rate upto 40 seconds is \( \frac{V_{3}-V_{2}}{40-30} \)
c. average rate upto 40 seconds is \( \frac{V_{3}}{40} \)
'Average rate upto 40 seconds is \( \frac{V_{3}-V_{1}}{40-20} \)
| 1 |
Chemistry
|
The stress-strain graphs for materials and B are shown in Fig. The graphs are drawn to the same scale.
(a) Which of the materials has the
greater Young's modulus?
(b) Which of the two is the stronger material?
| 3 |
Physics
|
Sublimation is used to purify:
A. plasma
B. gases
c. solids
D. liquids
| 3 |
Physics
|
Water is flowing in streamline motion through a horizontal tube. The pressure at a point in the tube is \( \boldsymbol{P} \) where the velocity of flow is \( v . \) At another point,
where the pressure is \( P / 2 \), the velocity
of flow is:
[Density of water \( =\rho \)
A \( \cdot \sqrt{v^{2}+\frac{P}{\rho}} \)
B. \( \sqrt{v^{2}-\frac{P}{\rho}} \)
c. \( \sqrt{v^{2}+\frac{2 P}{\rho}} \)
D. \( \sqrt{v^{2}-\frac{2 P}{\rho}} \)
| 3 |
Physics
|
State true or false:
In the figure, given below, \( 2 A D=A B \)
\( P \) is mid-point of \( A B . Q \) is mid-point of
DR and \( \boldsymbol{P R} \| \boldsymbol{B S}, \) then \( \boldsymbol{A Q} \| \boldsymbol{B S} \)
A. True
B. False
| 2 |
Maths
|
Factorize:
\( 2 x^{3} b^{2}-4 x^{5} b^{4} \)
| 2 |
Maths
|
Why HF acid is stored in plastic bottles?
| 1 |
Chemistry
|
When a substance \( A \) reacts with water, it produces a combustible gas \( B \) and a solution of substance \( C \) in water. \( D \)
reacts with this solution of \( C \) and
produces the same gas \( B \) on warming.
\( D \) can also produce gas \( B \) on reaction
with dilute \( H_{2} S O_{4} . A \) imparts a deep golden yellow colour to a smokeless flame. \( A, B, C \) and \( D \) are respectively:
A. \( N a, H_{2}, N a O H, Z n \)
в. \( K, H_{2}, \) КОН \( , \) Аг
c. \( C a, H_{2}, C a(O H)_{2}, S n \)
D. \( C a C_{2}, C_{2} H_{2}, C a(O H)_{2}, F e \)
| 1 |
Chemistry
|
The concentration of \( K^{+} \) ion in \( 0.1 \mathrm{M} \)
\( K_{2} C r_{2} O_{7} \) solution is \( x \) M. The value of
\( 10 x \) is
| 1 |
Chemistry
|
How much water must be added to 0.50
litre of \( 6.0 \mathrm{M} \) H \( C l \) to make the solution
2.0M ? Answer in liters.
A . 0.33
B. 0.50
c. \( 1 . \)
D. 1.5
E . 2.0
| 1 |
Chemistry
|
Borax is the sodium salt of:
A. Ortho boric acid.
B. Meta boric acid.
C. Tetra boric acid.
D. Pyro boric acid.
| 1 |
Chemistry
|
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