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\( D \)
\( E \)
\( D \Delta \Delta \)
\( \square \) | 2 | Maths |
In a pure capacitive A.C circuit current and voltage differ in phase by
A \( \cdot 0^{\circ} \)
B . \( 45^{\circ} \)
\( \mathrm{c} \cdot 90^{\circ} \)
D. \( 180^{\circ} \) | 3 | Physics |
The sum of first 45 natural numbers is:
A. 1035
в. 1280
c. 2070
D. 2140 | 2 | Maths |
Cynohydrin of which of the following compound can give lactic acid
A. \( H C H O \)
в. \( C H_{3} C O C H_{3} \)
c. \( C H_{3} C H O \)
D. \( C H_{3} C H_{2} C H O \) | 1 | Chemistry |
\( p K_{a} \) of weak acid is \( 3.0 . \) Effective range
of a buffer of \( \boldsymbol{H} \boldsymbol{A} \) and \( \boldsymbol{A}^{-} \) is about \( \boldsymbol{p} \boldsymbol{H}: \)
\( A \cdot 3 \) to 4
B. 3 to 6
c. 2 to 3
D. 2 to 4 | 1 | Chemistry |
Which of the following system of classification is based on gross
morphology of plants?
A. Natural system
B. Artificial system
C. Practical system
D. All system | 0 | Biology |
If \( A \) is \( 4 \times 5 \) matrix, if \( A^{T} B \) and \( B A^{T} \)
are defined then \( B= \)
\( \mathbf{A} \cdot 5 \times 4 \)
B. \( 4 \times 4 \)
\( \mathbf{c} .5 \times 5 \)
D. \( 4 \times 5 \) | 2 | Maths |
The total number of basic groups in the following form of lysine is:
\( A \)
B.
\( c \cdot 2 \)
\( D \)
\( E \cdot 4 \)
\( F .5 \)
\( G \cdot 6 \)
H.
8 | 1 | Chemistry |
For a firt order reaction \( \boldsymbol{A} \rightarrow \boldsymbol{P}, \) the
temperature (T) dependent rate constant (k) was found to follow the equation \( \log k=-(2000) \frac{1}{T}+6.0 . \) The
pre-exponential factor A and the
activation energy \( E_{a}, \) respectively, are?
A . \( 1.0 \times 10^{6} s^{-1} \) and \( 9.2 k J \) mol \( ^{-1} \)
B. \( 6.0^{-1} \) and \( 16.6 k J \) mol \( ^{-1} \)
C . \( 1.0 \times 10^{6} s^{-1} \) and \( 16.6 k J \) mol \( ^{-1} \)
D. \( 1.0 \times 10^{6} s^{-1} \) and \( 38.3 k J \) mol\( ^{-1} \) | 1 | Chemistry |
Assertion
Statement-1: All inter halogens are
diamagnetic
Reason
Statement-2: AB type of interhalogen undergoes hydroglysis giving a halide
ion derived from the smaller halogen
and a hypohalite ion derived from the
larger halogen.
A. Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-
B. Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-
c. Statement-1 is True, Statement-2 is False
D. Statement-1 is False, Statement-2 is True | 1 | Chemistry |
A figure has a rotational symmetry of order more than 1 , the angle of rotation
can be
A \( \cdot 21^{\circ} \)
B . \( 22^{\circ} \)
\( c \cdot 23^{\circ} \)
D. \( 24^{\circ} \) | 2 | Maths |
The mechanism of ATP formation both
in chloroplast and mitochondria is explained by
A. Relay pump theory of Godlewski
B. Cholodny-Went's model
c. chemiosmotic theory
D. Munch's pressure/ mass flow model | 0 | Biology |
Which of the following are true for
Cassiopeia?
This question has multiple correct options
A. It appears in the northern sky.
B. It has 5 prominent stars
C. It is visible during winter at late night
D. It looks like a distorted letter \( \mathrm{W} \) or \( \mathrm{M} \) | 3 | Physics |
Consider an iron rod of length 1 metre
and cross-section \( 1 \mathrm{cm}^{2} \) with a Young's
modulus of \( 10^{12} \) dyne \( c m^{-2} . \) We wish to
calculate the force with which the two
ends must be pulled to produce an elongation of \( 1 \mathrm{mm} \). It is equal to: | 3 | Physics |
Urine is stored in
A. Kidney
B. Urinary bladder
c. Ureter
D. Urethra | 0 | Biology |
Assertion
Specific gravity is dimensionless
quantity.
Reason
Specific gravity is relative density of a substance, measured with respect to
density of water at \( 4^{\circ} \mathrm{C} \)
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 |
Interpret the following equations geometrically on the Argand plane. \( \mathbf{1}<|\boldsymbol{z}-\mathbf{2}-\mathbf{3} \boldsymbol{i}|<\mathbf{4} \)
A. Annular
B. Straight line
c. A point
D. Ringg | 2 | Maths |
Solve :
\( \int \frac{3 x+5}{\sqrt{7 x+9}} d x \) | 2 | Maths |
The difference in \( P E \) of an object of mass \( 10 k g \) when it is taken from a
height of \( 6400 k m \) to \( 12800 k m \) from the surface of the earth is
B . \( 1.565 \times 10^{8} \mathrm{J} \)
C . \( 2.65 \times 10^{8} \) 」
D. \( 4.5 \times 10^{8} \) 」 | 3 | Physics |
Find the slope of the line passing through the points (-1,1) and (2,2) | 2 | Maths |
Solute when dissolved in water:
A. increases the vapour pressure of water
B. decreases the boiling point of water
C . decreases the freezing point of water
D. all of the above | 1 | Chemistry |
In the given fig \( A D \) divides \( \angle B A C \) in
the ratio 1: 3 and \( A D=D B \)
Determine the value of \( x \) | 2 | Maths |
The points (2,5) and (5,1) are the two opposite vertices of a rectangle. If the other two vertices are points on the straight line \( y=2 x+k, \) then the value
of k is
\( A \cdot 4 \)
B. 3
\( c \cdot-4 \)
\( D \cdot-3 \)
\( E \) | 2 | Maths |
The oxidation number of 'N' in NOCIO:
\( A \cdot+3 \)
B. +1
\( c \cdot+2 \)
\( D \cdot+7 \) | 1 | Chemistry |
The standard entropies of \( N_{2}(g), H_{2}(g) \)
and \( N H_{3}(g) \) are \( 191.5,130.5,192.6 J K^{-1} \)
mol \( ^{-1} \).The value of \( \Delta S^{\circ} \) of formation of
ammonia is? | 1 | Chemistry |
What is the correct name for an organic compound with the molecular formula
\( \boldsymbol{C}_{3} \boldsymbol{H}_{8} ? \)
A. Methane
B. Ethane
c. Isobutane
D. Propane | 1 | Chemistry |
A plot of \( f \) vs \( (1 / T) \) gives
A. a straight line passing through the origin
B. a straight line parallel to frequency axis
C. a straight line perpendicular to frequency axis
D. a straight line having an intercept along frequency axis | 3 | Physics |
Buildings are more susceptible to a lightning strike because
A. they are higher than their surroundings.
B. roofs of buildings are wet in rainy season and hence become good conductors of electricity.
c. the top of the building is wet and acquires an opposite charge to a cloud passing over the top by induction
D. All of the above | 3 | Physics |
Arrange the following in order of decreasing acidic strength. nitrophenol
(1), p-cresol (II), m-cresol phenol (IV) :
A \( . I>I V>I I>I I I \)
\( I \)
B. \( I V>I I I>I I>I \)
c. \( I>I I>I I I>I V \)
\( . I I I>I I>I>I V \)
\( V \) | 1 | Chemistry |
Inductive reactance of a coil is
expressed in
A. Amphere
B. onm
c. volt
D. weber | 3 | Physics |
In a Std. \( X \) class, out of 40 students, 10
students use spectacles, 2 students
have positive power and 8 students
have negative power of lenses in their spectacles. Answer the following questions:
(i) What does the negative power
indicate?
(ii) What does the positive power indicate?
(iii) Generally which type of spectacles
do most of the students use?
(iv) What defect of eyesight do most of the students suffer from?
(v) Give two possible reasons for the above defect. | 3 | Physics |
Draw a Venn-diagram to show the
relationship between two overlapping sets \( A \) and \( B \). Now shade the region
representing \( \boldsymbol{A} \cap \boldsymbol{B} \) | 2 | Maths |
Q Type your question
\( \left(\frac{a x}{d t}\right) \) is plotted against \( \log [A], \) then the
graph is of the type:
\( A \)
B.
\( c \)
\( D \) | 1 | Chemistry |
The U shaped vessel used in Nelson cell
is lined inside with asbestos which:
A. helps in the separation of cathode and anode compartments
B. acts as an insulator.
C. helps \( H^{+} \) ions to reduced to \( H_{2} \) gas
D. allows the dissociation of steam. | 1 | Chemistry |
Q Type your question
now-famous oil-drop experiment. In that experiment, tiny oil drops were sprayed into a uniform electric field between a
horizontal pair of oppositely charged plates.The drops were observed with a magnifying eyepiece, and the electric field was adjusted so that the upward force on some negatively charged oil drops was just sufficient to balance the
downward force of gravity. That is, when suspended, upward force qE just equaled mg. Millikan accurately measured the charges on many oil drops and found the values to be whole number multiples of \( 1.6 \times 10^{-19} C \) the
charge of the electron. For this, he won the Nobel prize. If a drop of mass \( 1.08 \times \)
\( 10^{-14} k g \) remains stationary in an
electric field of \( 1.68 \times 10^{5} N C^{-1} \), then
the charge of this drop is :
A. \( 6.40 \times 10^{-19} \mathrm{C} \)
B . \( 3.2 \times 10^{-19} C \)
c. \( 1.6 \times 10^{-19} C \)
D. \( 4.8 \times 10^{-19} \mathrm{C} \) | 3 | Physics |
Four equal charges q each are placed at four corners of a square of side a each. Work done in carrying a charge q from its centre to infinity is:
A. zero
В. \( \frac{2 q^{2}}{\pi \varepsilon_{0} a} \)
c. \( \frac{\sqrt{2} q^{2}}{\pi \varepsilon_{0} a} \)
D. \( \frac{q^{2}}{2 \pi \varepsilon_{0} a} \) | 3 | Physics |
To balance the bridge in the circuit, the values of \( \mathrm{R} \) is
\( A \cdot 8 \Omega \)
B. \( 4 \Omega \)
\( c \cdot 20 \Omega \)
D. \( 12 \Omega \) | 3 | Physics |
Assertion
The morphology of mycoplasma is not
specific
Reason
They lack a rigid cell wall
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 | 0 | Biology |
There is continuous multiplication in
cell nuclei and all nuclei have same
genetic information. The cell is undergoing
A. Multiple rounds of karyokinesis, but no cytokinesis
B. Multiple rounds of the M phase, but no rounds of the phase
c. Multiple rounds of cytokinesis, but no rounds of karyokinesis
D. Multiple rounds of the cell cycle, but no rounds of mitosis
E. multiple rounds of the S phase, but no other phases of the cell cycle | 0 | Biology |
In the above problem, the angular acceleration
of the particle at \( t=2 \sec \) is
rads\( ^{-2} \)
A \( \cdot 14 \)
B. 16
\( c \cdot 18 \)
D. 24 | 3 | Physics |
The rate of certain hypothetical reaction \( A+B+C \rightarrow \) products is given by \( \boldsymbol{r}=-\frac{\mathbf{d}[\boldsymbol{A}]}{\mathbf{d} \boldsymbol{t}}=\boldsymbol{K}[\boldsymbol{A}]^{1 / 2} \boldsymbol{K}[\boldsymbol{B}]^{1 / 3} \boldsymbol{K}[\boldsymbol{C}]^{1 / 4} \)
The order of the reaction:
\( A \)
в. \( \frac{1}{2} \)
\( c \cdot 2 \)
D. \( \frac{13}{12} \) | 1 | Chemistry |
Find \( a, b \) in \( \int \frac{x+2}{\left(x^{2}+3 x+3\right) \sqrt{x+1}} d x= \)
\( \frac{\boldsymbol{a}}{\sqrt{\boldsymbol{b}}} \tan ^{-1}\left\{\frac{\boldsymbol{x}}{\sqrt{\mathbf{3}(\boldsymbol{x}+\mathbf{1})}}\right\}+\boldsymbol{C} \)
This question has multiple correct options
\( \mathbf{A} \cdot a=2 \)
B. \( b=3 \)
\( \mathbf{c} \cdot a=3 \)
\( \mathbf{D} \cdot b=2 \) | 2 | Maths |
In the reaction,
\( \mathbf{2} \boldsymbol{N} \boldsymbol{H}_{3}(\boldsymbol{g})+\mathbf{5} \boldsymbol{F}_{2} \rightarrow \boldsymbol{N}_{2} \boldsymbol{F}_{4}+\boldsymbol{6} \boldsymbol{H} \boldsymbol{F} \)
\( 3.56 g N_{2} F_{4} \) is obtained by mixing \( 2 g \)
\( N H_{3} \) and \( 8 \mathrm{g} F_{2} . \) The percentage yield of the production is:
A . 81.28\%
B . 71.2\%
c. \( 68 \% \)
D. 79\% | 1 | Chemistry |
Using the \( \in-\delta \) definition prove that
\( \lim _{x \rightarrow-2}(3 x+8)=2 \) | 2 | Maths |
The life span of a Daniel cell may
increased by:
A. large Cu electrode
B. lowering of CuSO \( _{4} \) concentration
C. lowering of ZnSO \( _{4} \) concentration
D. large zinc electrode | 1 | Chemistry |
On the basis of following reactions, identify the correct matchings. \( \boldsymbol{A}_{(a q)}+\boldsymbol{A l} \stackrel{\text {heat}}{\longrightarrow} \boldsymbol{B}_{(\boldsymbol{g a s})} \) (colorless
combustible gas which is lightest) \( \boldsymbol{A}_{(\boldsymbol{a q})}+\boldsymbol{C} \stackrel{\text {heat}}{\longrightarrow} \boldsymbol{P} \boldsymbol{H}_{3(\boldsymbol{g a s})} \)
\( \boldsymbol{A}_{(a q)}+\boldsymbol{N} \boldsymbol{H}_{4} \boldsymbol{C l} \stackrel{\text {heat}}{\longrightarrow} \boldsymbol{D}_{(\boldsymbol{g} a s)}( \) turns red
litmus blue)
A. \( A=N a O H \) and \( C=P_{4} \)
в. \( A=C H_{3} C O O H \) and \( B=C H_{4} \)
C. \( A=K O H, D=N H_{3} \) and \( C=H_{3} P O_{4} \)
D. \( A=H C l, B=H_{2} \) and \( C=H_{3} P O_{4} \) | 1 | Chemistry |
Find the region on Y-axis in which reflected rays are present. Object is at \( A \)
(2,0) and \( \mathrm{MN} \) is a plane mirror, as shown in Fig. | 3 | Physics |
Generally, good conductors have low specific heat capacity. True/False? Justify your answer. | 3 | Physics |
Mass of beaker=10g Mass of mixture+beaker=25g Mixture contains \( 30 \% \) sand. Find the
weight of sand.
\( A \cdot 58 \)
B. \( 4.5 \mathrm{g} \)
\( c \cdot 3 g \)
D. 3.5 g | 1 | Chemistry |
Construct a triangle \( A B C \) in which
\( A B+A C=5.6 c m, B C=4.5 c m \) and
\( \angle B=45^{\circ} \) | 2 | Maths |
The \( 9^{t h} \) term of an A.P. is 449 and \( 449^{t h} \)
term is 9 The term which is equal to
zero is
A \( \cdot 501^{t h} \)
B . \( 502^{\text {th }} \)
\( \mathbf{c} \cdot 508^{t h} \)
D. None of these | 2 | Maths |
The energy equivalent of 1 amu is
A. 931 eV th
В. \( 93.1 V \)
\( \mathbf{c} .931 \mathrm{MeV} \)
D. \( 9.31 \mathrm{MeV} \) | 3 | Physics |
The functional groups present in the following compound is:
\( \boldsymbol{C H}_{3} \boldsymbol{C H}_{2} \boldsymbol{C H}_{2} \boldsymbol{C O O H} \)
A. carboxylic acid
B. carbonate
c. alcohol
D. carboxylate | 1 | Chemistry |
Which of the following statement(s) is/are correct when a mixture of \( N a C l \)
and \( K_{2} C r_{2} O_{7} \) is gently warmed with
conc. \( \boldsymbol{H}_{2} \boldsymbol{S} \boldsymbol{O}_{4} ? \)
This question has multiple correct options
A. A deep red vapor is evolved.
B. The vapor when passed into NaOH solution gives yellow solution of \( N a_{2} C r O_{4} \)
c. chlorine gas is evolved.
D. chromyl chloride is formed. | 1 | Chemistry |
On adding \( N a O H \) to ammonium
sulphate, a colourless gas with pungent odour is evolved which forms a blue
coloured complex with \( C u^{2+} \) ion.
Identify the gas. | 1 | Chemistry |
(i) Why does a bottle of soft drink cool faster when surrounded by ice cubes
than by ice cold water, both at \( 0^{\circ} \mathrm{C} \) ?
(ii) A certain amount of heat \( Q \) will
warm \( 1 g \) of material \( X \) by \( 3^{\circ} C \) and \( 1 g \) of
material \( Y \) by \( 4^{o} C . \) Which material has a higher specific heat capacity? | 3 | Physics |
If \( \int \frac{1}{\left(x^{2}+4\right)\left(x^{2}+9\right)} d x=A \tan ^{-1} \frac{x}{2}+ \)
\( B \tan ^{-1}\left(\frac{x}{3}\right)+C \) then \( A-B= \)
A \( \cdot \frac{1}{6} \)
B. \( \frac{1}{30} \)
\( c \cdot-\frac{1}{3} \)
D. \( -\frac{1}{6} \) | 2 | Maths |
The electricity developed on objects, when they are rubbed with each other is
called:
A. Frictional potential
B. Frictional electricity
c. Static electricity
D. Static potential | 3 | Physics |
Series can be defined as:
A. a number of things or events that are arranged or happen one after the other.
B. a set of regularly presented television shows involving the same group of characters or the same subject.
C. set of books, articles, etc., that involve the same group of characters or the same subject
D. All of the above | 2 | Maths |
Describe oxygen-haemoglobin dissociation curve | 0 | Biology |
A canon after firing recoils due to newton's third law of motion.
A . True
B. False | 3 | Physics |
Chloragogen cells are present in
A. Body wall of Leucosolenia
B. Blood of earthworm
C. Coelomic fluid of earthworm
D. Blood of cockroach | 0 | Biology |
State whether true or false:
A concave lens is used as a magnifying glass
A. True
B. False | 3 | Physics |
Integrate: \( \int \tan ^{3} x d x \) | 2 | Maths |
In which types of frames Newtons laws can be applied? | 3 | Physics |
5 is a rational number. It can be written
as
A \( \cdot \frac{5}{1} \)
B. \( \frac{1}{5} \)
\( c \cdot \frac{5}{5} \)
D. \( \frac{5}{25} \) | 2 | Maths |
\( \int \frac{(x+3) e^{x}}{(x+4)^{2}} d x \) is equal to
A. \( \frac{1}{(x+4)^{2}}+C \)
в. \( \frac{e^{x}}{(x+3)}+C \)
c. \( \frac{e^{x}}{(x+4)^{2}}+C \)
D. \( \frac{e^{x}}{(x+4)} \) | 2 | Maths |
Find out the number of bivalents in
zygotene stage, if there are 60
chromosomes in \( G_{1} \) phase.
A . 60
B. 30
c. 15
D. 45 | 0 | Biology |
Find the vector equation of the plane passing through the points (2,5,-3),(-2,-3,5) and (5,3,-3) | 2 | Maths |
The ammonia evolved from the
treatment of \( 1.50 \mathrm{g} \) of an organic compound for the estimation
of nitrogen was passed in \( 100 \mathrm{ml} \) of 0.5 M sodium hydroxide solution for complete neutralization.
The organic compound is:
A. thiourea
B. benzamide
c. urea
D. acetamide | 1 | Chemistry |
If an electric current is passed through a nerve, the man
A. begins to laugh
B. begins to weep
\( \mathbf{c} . \) is excited
D. becomes insensitive to pain | 3 | Physics |
Two cars \( A \) and \( B \) are travelling in the
same direction with velocities \( \boldsymbol{v}_{A} \) and
\( \boldsymbol{v}_{B}\left(\boldsymbol{v}_{A}>\boldsymbol{v}_{B}\right) . \) When the car \( \boldsymbol{A} \) is at a
distance \( d \) behind the car \( B \) the driver
of the car \( A \) applies brakes producing a
uniform retardation \( a \). There will be no
collision when
A \( \cdot \quad d<\frac{\left(v_{A}-v_{B}\right)^{2}}{2 a} \)
B. \( d<\frac{v_{A}^{2}-v_{B}^{2}}{2 a} \)
c. \( _{d}>\frac{\left(v_{A}-v_{B}\right)^{2}}{2 a} \)
D. \( d>\frac{v_{A}^{2}-v_{B}^{2}}{2 a} \) | 3 | Physics |
Find the oxidation numbers to the
underlined species in the following compounds or ions.
A) \( N a \underline{B} H_{4} \)
B) \( \boldsymbol{H}_{2} \boldsymbol{P} \boldsymbol{t} \boldsymbol{C l}_{\boldsymbol{6}} \) | 1 | Chemistry |
Rhombic sulphur remains stable below
\( 95.6^{\circ} \mathrm{C} \)
A. True
B. False | 1 | Chemistry |
What is hybrid vehicle technology? Expalin is advantages with a suitable example? | 0 | Biology |
Which of the following is a weak electrolyte?
A. \( N a_{2} C O_{3} \)
в. \( K H C O_{3} \)
c. \( \left(C H_{3} C O O\right)_{2} P b \)
D. All of the above | 1 | Chemistry |
Find the area of \( \square A B C D \)
\( \mathbf{A} \cdot 4(24+25 \sqrt{3}) c m^{2} \)
B \( \cdot 4(25+24 \sqrt{3}) c m^{2} \)
\( \mathbf{c} \cdot 2(24+25 \sqrt{3}) c m^{2} \)
D. None of these | 2 | Maths |
Acid rain is caused by:
A. deforestation
B. \( C O_{2} \)
\( \mathrm{c} \cdot \mathrm{CO} \)
D. oxides of sulphur and nitrogen | 1 | Chemistry |
The exchange of gases in the alveoli of the lungs takes place by
A. Osmosis
B. Simple diffusion
c. Passive transport
D. Active transport | 0 | Biology |
A metal which does not react with cold
water but reacts with steam to liberate
\( H_{2} \) gas is :
A. \( N a \)
в. \( M g \)
c. \( A u \)
D. \( F e \) | 1 | Chemistry |
What is the action of acidified
potassium dichromate on the following:
1. \( \boldsymbol{H}_{2} \boldsymbol{S} \) | 1 | Chemistry |
Solve: \( \frac{\sin ^{3} \frac{x}{2}-\cos ^{3} \frac{x}{2}}{2+\sin x}=\frac{\cos x}{3} \)
A. \( x=(2 n+1) \frac{\pi}{2}, n \epsilon z \)
B \( \cdot x=(4 n+1) \frac{\pi}{2}, n \epsilon z \)
C \( \cdot x=(4 n+1) \frac{\pi}{4}, n \epsilon z \)
D \( \cdot x=(2 n+1) \frac{\pi}{4}, n \epsilon z \) | 2 | Maths |
An electron is projected in the same
direction of uniform magnetic field.
Then
A. the electron turns to right
B. the electron turns to left
C. the electron velocity remains constant
D. the electron velocity decreases in magnitude | 3 | Physics |
Subtract \( 4 p^{2} q-3 p q+5 p q^{2}-8 p- \)
\( 7 q-10 \) from \( 18-3 p+11 q+5 p q \)
\( 2 p q^{2}+5 p^{2} q \)
A \( \cdot p q^{2}-7 p^{2} q+8 p q+18 q+5 p+28 \)
B . \( p^{2} q-7 p q^{2}+8 p q+18 p+5 q+28 \)
C \( \cdot p q^{2}-7 p^{2} q+8 p q+18 p+5 q+28 \)
D. \( p^{2} q-7 p q^{2}+8 p q+18 q+5 p+28 \) | 2 | Maths |
In a salt solution, the flow of current is:
A. same as the direction of positive ions
B. opposite to the direction of negative ions
c. both a and b
D. opposite to the direction of positive ions | 1 | Chemistry |
The essential chemical components of
many coenzymes are
A. Proteins
B. Nucleic acids
c. carbohydrates
D. Vitamins | 0 | Biology |
The degree of dissociation of
\[
\boldsymbol{P C l}_{5}(\boldsymbol{g}) \rightleftharpoons \boldsymbol{P C l}_{3}(\boldsymbol{g})+\boldsymbol{C l}_{2}(\boldsymbol{g})
\]
with increase in
pressure at equilibrium.
A . increases
B. decreases
c. first increases and then decreases
D. first decreases and then increases | 1 | Chemistry |
Explain Curie's law for a paramagnetic
substance. | 3 | Physics |
\( \lim _{x \rightarrow 3} \frac{\sqrt{4-x}-\sqrt{x-2}}{15-5 x} \) | 2 | Maths |
A parallel beam of monochromatic unpolarised light is incident on a transparent dielectric plate of refractive index \( \frac{1}{\sqrt{3}} . \) The reflected beam is completely polarised. Then the angle of incidence is
\( A \cdot 30^{\circ} \)
B. \( 60^{\circ} \)
\( c \cdot 45^{\circ} \)
D. \( 75^{\circ} \) | 3 | Physics |
Heat of neutralization of \( \boldsymbol{H} \boldsymbol{C l} \) and
\( N a O H \) is \( x \) kJ and that of \( C H_{3} C O O H \)
and \( N a O H \) is \( y \) kJ. What is heat of
ionization of \( \boldsymbol{C H}_{3} \) COOH.
В. \( (y-x) \) к)
D. \( -(x+y) \) k) | 1 | Chemistry |
If the half life period for a first order
reaction is 69.3 seconds, what is the
value of its rate constant? | 1 | Chemistry |
If the mass defect of \( _{5} B^{11} \) is \( 0.081 u, \) its
average binding energy (in \( M e V \) ) is:
A . 8.60
B. 6.85
\( c .5 .60 \)
D. 5.86 | 3 | Physics |
Seeds of gymnosperms have three
generations, that is
A. Two sporophytic and one gametophytic generation
B. Two gametophytic and one sporophytic
C. All three sporophytic generations
D. All three gametophytic generations | 0 | Biology |
Assertion
During change of state, specific heat of a substance is zero.
Reason
Specific heat of a substance is directly proportional to change of heat and inversely proportional to change in temperature
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. Assertion is incorrect but Reason is correct | 3 | Physics |
Choose the correct answer:
Sound can travel through
A. Gases only
B. Solids only
c. Liquids only
D. solids, liquids and gases | 3 | Physics |
Which of the following has least polar
\( C-X \) bond?
A. \( H_{3} C-C H=C H_{2}-C l \)
в. \( H O-C H=C H_{2}-C l \)
c. \( O_{2} N-C H=C H_{2}-C l \)
D. \( H S-C H=C H_{2}-C l \) | 1 | Chemistry |
Among cellulose, polyvinyl chloride, nylon and natural rubber, in which of the polymer intermolecular force of attraction is weakest?
A. Nylon
B. Polyvinyl chloride
c. cellulose
D. Natural rubber | 1 | Chemistry |
\( \mathbf{A}= \) the domain of \( \mathbf{f} \) where \( \mathbf{f}(\mathbf{x})=\log \mathbf{x}^{2} \)
and \( \mathbf{B}= \) the domain of \( \mathbf{g} \) where \( \mathbf{g}(\mathbf{x})= \) \( 2 \log x, \) then \( \mathbf{A}-\mathbf{B}= \)
\( A \cdot \phi \)
В \( \cdot(-\infty, 0) \)
c. \( (0, \infty) \)
D. (0,1) | 2 | Maths |
\( f(x)=\left\{\begin{array}{l}x-5 ; x \leq 1 \\ 4 x^{2}-9 ; 1<x \leq 2 \\ 3 x^{2}+4 ; x>2\end{array}\right. \)
Then \( \boldsymbol{f}\left(\boldsymbol{2}^{+}\right)-\boldsymbol{f}\left(\boldsymbol{2}^{-}\right)= \)
\( A \)
B. 2
\( c \)
\( D \) | 2 | Maths |
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