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Which of the following species have undistorted octahedral structures?
1. \( \boldsymbol{S F}_{\mathbf{6}} \)
2. \( \boldsymbol{P F}_{\mathbf{6}}^{-} \)
3. \( \boldsymbol{S} \boldsymbol{i} \boldsymbol{F}_{\boldsymbol{6}}^{2-} \)
4. \( \boldsymbol{X} \boldsymbol{e} \boldsymbol{F}_{\boldsymbol{6}} \)
A. 2,3 and 4
B. 1,3 and 4
\( c .2 \) and 3
D. 1,2 and 3 | 1 | Chemistry |
How does respiration occur in the stem of the plant? | 0 | Biology |
Say true or false.
The volume of a sphere is equal to twothird of the volume of a cylinder whose height and diameter are equal to the
diameter of the sphere.
A. True
B. False | 2 | Maths |
Give the target gland for
gonadotrophins (LH and FSH). | 0 | Biology |
\( \cos x+\cos y=\frac{4}{5}, \cos x-\cos y=\frac{2}{7} \)
The value of \( 14 \tan \left(\frac{x-y}{2}\right)+ \)
\( \mathbf{5} \cot \left(\frac{\boldsymbol{x}+\boldsymbol{y}}{\mathbf{2}}\right) \) is
\( \mathbf{A} \cdot \mathbf{0} \)
B.
\( c \cdot \frac{5}{4} \)
D. | 2 | Maths |
\( A B \| D E \). Find the measure of \( \angle A O D \) | 2 | Maths |
A projectile aimed at a mark which is in
the horizontal plane through the point of projection falls a cm short of it when the
elevation is \( \alpha \) and goes \( b c m \) too far
when the elevation is \( \beta . \) Show that if the
velocity of projection is same in all the case, the proper elevation is \( \frac{1}{2} \sin ^{-1}\left[\frac{b \sin 2 \alpha+a \sin 2 \beta}{a+b}\right] \) | 3 | Physics |
If \( \boldsymbol{P}(\boldsymbol{A})=\mathbf{0 . 7}, \boldsymbol{P}(\boldsymbol{B})=\mathbf{0 . 5 5}, \boldsymbol{P}(\boldsymbol{C})= \)
\( \mathbf{0 . 5}, \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B})=\boldsymbol{x}, \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{C})= \)
\( \mathbf{0 . 4 5}, \boldsymbol{P}(\boldsymbol{B} \cap \boldsymbol{C})=\mathbf{0 . 3} \) and \( \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B} \cap \)
\( C)=0.2, \) then
A. \( 0.2 \leq x \leq 0.45 \)
в. \( 0.2 \leq x \leq 0.5 \)
c. \( 0.2 \leq x \leq 0.65 \)
D. \( 0.2 \leq x \leq 1 \) | 2 | Maths |
An infinitely long time charge having a uniform charge per unit length \( \lambda \) lies at a distance d from a point 0 as shown in Fig. Determine the total electric flux
through the surface of sphere of radius
R centered at 0 resulting from this line charge. Consider both cases where Rd.
\( A \)
B. \( \frac{7 \lambda \sqrt{R^{2}-d^{3}}}{\varepsilon_{0}} \)
c. \( \frac{7 \lambda \sqrt{R^{2}-d^{2}}}{2 \varepsilon_{0}} \)
\( D \) | 3 | Physics |
What is the function of
sclerenchymatous tissue?
A. Flexibilty
B. Tenderness
c. strength
D. All of the above | 0 | Biology |
The bond order of a molecule is given by:
A. the difference between the number of electrons in
bonding and antibonding orbitals
B. total number of electrons in bonding and antibonding orbitals
C. twice the difference between the number of electrons in bonding and antibonding orbitals
D. half the difference number of electrons in bonding and antibonding orbitals | 1 | Chemistry |
If angle of repose is \( 30^{\circ}, \) then coefficient of friction will be
\( \mathbf{A} \cdot \mathbf{1} \)
B . 15
c. \( \frac{1}{\sqrt{3}} \)
D. \( \frac{\sqrt{3}}{2} \) | 3 | Physics |
Bundle of His is a network of
A. Nerve fibres found throughout the heart
B. Muscle fibres distributed throughout the heart walls
C. Muscle fibres found only in the ventricle wall
D. Nerve fibres distributed in ventricles | 0 | Biology |
A battery of emf \( E_{0}=12 \mathrm{V} \) is connected across a \( 4 \mathrm{m} \) long uniform wire having
resistance \( \frac{4 \Omega}{m} . \) The cells of small emfs \( \varepsilon_{1} \)
\( =2 V \) and \( \varepsilon_{2}=4 V \) having internal
resistance \( 2 \Omega \) and \( 6 \Omega \) respectively, are connected as shown in the figure. If
galvanometer shows no deflection at the point \( \mathrm{N} \), find the distance of point \( \mathrm{N} \)
from the point \( \mathbf{A} \) | 3 | Physics |
The oxidation number of carboxylic
carbon atom in \( C H_{3} C O O H \) is | 1 | Chemistry |
Correct wrong statements if found any from those given below:
(a) When difference in electronegativity increases, the possibility of covalent bonding increases.
(b) Electronegativity increases while moving from left to right along a period.
(c) lonic bond is present in \( \boldsymbol{H} \boldsymbol{C l} \) molecule.
(d) Partial ionic bond is also there in
polar molecule | 1 | Chemistry |
Shrutii secured \( 60 \% \) marks in
Mathematics \( 55 \% \) in english and \( 60 \% \) in Hindi. If the maximum marks in the
subject were 75,60 and 65 respectively, find her aggregate percentage of mark. | 2 | Maths |
Which of the following is general electron configuration of \( 4 d \) series?
\( \mathbf{A} \cdot 4 s^{1+o 2} 3 d^{1+t 01} \)
B. \( 4 s^{1 t o 2} 4 d^{1+t 01} \)
\( \mathbf{c} \cdot 5 s^{1 t o 2} 5 d^{1 t o 10} \)
D. \( 5 s^{1 \operatorname{to} 2} 4 d^{1 \text { lto } 10} \) | 1 | Chemistry |
Match the following:
Biodegradable \( \mathbf{F} \)
(i) \( \quad(p) \quad \) Hydroxybuta B
p polymer poing
(ii) Phenol
2-chlorobuta-1
(ii) Bakelite
(ig) Phenol
Neoprene
(iv) Glyptal
(r) 2-chlore
diene
(iii) 2-chlo
diene
\( \mathbf{A} \cdot i-p, i i-q, i i i-r, i v-s \)
B \( . i-q, i i-p, i i i-r, i v-s \)
\( \mathbf{c} \cdot i-p, i i-q, i i i-s, i v-r \)
D. \( i-s, i i-r, \) ii \( i-p, i v-q \) | 1 | Chemistry |
A solution prepared by dissolving a \( 2.50 g \) sample of an unknown compound dissolved in \( 34.0 g \) of benzene,
\( C_{6} H_{6} \) boils at \( 1.38^{\circ} C \) higher than pure benzene. Which expression gives the molar mass of the unknown compound
\( ? \)
Compound \( K_{b} \)
\( \boldsymbol{C}_{6} \boldsymbol{H}_{6} \quad \boldsymbol{2 . 5 3}^{\circ} \boldsymbol{C} \cdot \boldsymbol{m}^{-1} \)
A \( \cdot 2.53 \times \frac{2.50}{1.38} \)
в. \( _{1.38} \times \frac{34.0}{2.53} \times 2.50 \)
c. \( 2.50 \times 10^{3} \times \frac{2.53}{34.0} \times \frac{1}{1.38} \)
D. \( 2.50 \times 10^{3} \times \frac{1.38}{34.0} \times 2.53 \) | 1 | Chemistry |
Find the total cost of wooden fencing around a circular garden of diameter \( 28 m . \) If \( 1 m \) of fencing costs 2300 | 2 | Maths |
A sinusoidal voltage \( V=200 \sin 314 t \)
is applied to a \( 10 \Omega \) resistor. Find rms
voltage.
A . \( 141.4 V \)
B. \( 314.2 V \)
c. \( 519.6 V \)
D. 278.9V | 3 | Physics |
Divide as directed.
\( \mathbf{5} 2 p q r(p+q)(q+r)(r+p) \div \)
\( \mathbf{1 0 4 p q}(\boldsymbol{q}+\boldsymbol{r})(\boldsymbol{r}+\boldsymbol{p}) \) | 2 | Maths |
The straight lines \( \mathbf{x}+\mathbf{2 y}-\mathbf{9}=\mathbf{0}, \mathbf{3 x}+ \)
\( 5 y-5=0 \) and \( a x+b y-1=0 \) are
concurrent if the straight line \( 22 x- \)
\( 35 y-1=0 \) passes through the point
\( A \cdot(a, b) \)
в. \( (b, a) \)
c. \( (-a, b) \)
D. (-a,-b) | 2 | Maths |
What is the correct way of writing a
scientific name ? Illustrate with
example. | 0 | Biology |
Wavelength of a laser beam can be used as a standard of:
A. time
B. temperature
c. angle
D. length | 3 | Physics |
Vitamin A is essential for good
eyesight.
A. True
B. False | 3 | Physics |
The air which is taken in or given out during a single breath is known as
A. Residual air
B. Vital air
c. Tidal air
D. All of the above | 0 | Biology |
A natural growth regulator is
A. \( 2,4- \) D
B. Benzaldehyde
c. NAA
D. Ethylene | 0 | Biology |
Which one of the following statements
can best explain the term critical
concentration of an essential element?
A. Essential element concentration below which plant growth is retarded
B. Essential element concentration below which plant growth becomes enhanced
C. Essential element concentration below which plant remains in the vegetative phase
D. None of the above | 0 | Biology |
The function \( \mathbf{f}(\mathbf{x})=\mathbf{2} \log (\mathbf{x}-\mathbf{3})- \)
\( x^{2}+6 x+3 \) increases in the interval
A . (3,4)
в. \( (-\infty, 2) \)
\( c \cdot(3, \infty) \)
D. None ot these | 2 | Maths |
The IUPAC name of
\( \left[\boldsymbol{C o}\left(\boldsymbol{N} \boldsymbol{H}_{\mathbf{3}}\right)_{\boldsymbol{6}}\right]\left[\boldsymbol{C r}\left(\boldsymbol{C}_{\boldsymbol{2}} \boldsymbol{O}_{\boldsymbol{4}}\right)_{\boldsymbol{3}}\right] \)
is
A. Hexaamminecobalt (III) tris (Oxalato) chromate (III)
B. Hexaamminecobalt (III) tris (Oxalato) chromium (III)
C. Hexaamminecobalt (II) tris (Oxalato) chromium (III)
D. Hexaamminecobalt (III) trisoxalatochromate (III) | 1 | Chemistry |
Find differential equation of all circles in the first quadrant which touch the co-ordinate axis. | 2 | Maths |
is a degradation phenomenon in which the electrons in a plastic are so strongly attracted to
oxygen atoms.
A. Oxidation
B. Reduction
c. Hydrolysis
D. Polymerization | 1 | Chemistry |
Name the top view of the diagram.
A. pentagon
B. square
C . rectangle
D. triangle | 2 | Maths |
A charge \( Q \) is distributed over two
concentric hollow spheres of radii \( a \) and \( b(a>b), \) so that the surface charge
densities are equal. The potential at the common centre is \( \frac{1}{4 \pi \epsilon_{0}} \) times
A \( \cdot k Q\left(\frac{a+b}{a^{2}+b^{2}}\right) \)
в. \( 2 Q\left(\frac{a+b}{a^{2}+b^{2}}\right) \)
\( c \cdot Q \)
D. \( \frac{Q}{2}\left(\frac{a+b}{a^{2}+b^{2}}\right) \)
E \( \cdot \frac{Q}{4}\left(\frac{a+b}{a^{2}+b^{2}}\right) \) | 3 | Physics |
If the major axis of an ellipse is three times the minor axis, then its
eccentricity is equal to
A \( \cdot \frac{1}{3} \)
B. \( \frac{1}{\sqrt{3}} \)
c. \( \frac{1}{\sqrt{2}} \)
D. \( \frac{2 \sqrt{2}}{3} \)
E \( \frac{2}{3 \sqrt{2}} \) | 2 | Maths |
If \( f(z)=\frac{1-z^{3}}{1-z}, \) where \( z=x+i y \) with \( z \neq 1, \) then \( R e \overline{\{f(z)\}}=0 \) reduces to
A \( \cdot x^{2}+y^{2}+x+1=0 \)
B . \( x^{2}-y^{2}+x-1=0 \)
c. \( x^{2}-y^{2}-x+1=0 \)
D. \( x^{2}-y^{2}+x+1=0 \)
E \( \cdot x^{2}-y^{2}+x+2=0 \) | 2 | Maths |
Give a brief account of the counter
current mechanism. | 0 | Biology |
A copper rod of length \( l \) is rotated about one end, perpendicular to the uniform
magnetic field \( B \) with constant angular velocity \( \omega . \) The induced emf between
two ends of the rod is:
A \( \cdot \frac{1}{2} B \omega l^{2} \)
в. \( B \omega l^{2} \)
c. \( \frac{3}{2} B \omega l^{2} \)
D . \( 2 B \omega l^{2} \) | 3 | Physics |
Describe a method to determine the
specific heat capacity of a solid, like a piece of copper.
\( A \) | 3 | Physics |
With the help of the given clues, unscramble the letters to make a
meaningful word. RAYXLN (produces sound in humans) | 3 | Physics |
The angles of dip at the poles and the equator respectively are.
A . \( 30^{\circ}, 60^{\circ} \)
B . \( 0^{\circ}, 90^{\circ} \)
c. \( 45^{\circ}, 90^{\circ} \)
D. \( 90^{\circ}, 0^{\circ} \) | 3 | Physics |
Sulphate of an alkaline earth metal which crystalizes without water of hydration is?
\( A \cdot B e^{2} \)
в. \( M g^{2+} \)
c. \( C a^{2+} \)
\( D \cdot S r^{2} \) | 1 | Chemistry |
The energy required to raise a given volume of water from a well can be
A. Mega watts
B. Mega newton
c. Mega joules
D. Kilo watts | 3 | Physics |
Which of these can be one of the uses of
colloids?
A. Colloids act as transport vector
B. Colloids are used in intravenous therapy
C. Movement of enzyme molecules in water is because of colloid action
D. All of the above | 1 | Chemistry |
A buffer solution made up of \( B O H \) and
\( B C l \) of total molarity \( 0.29 \mathrm{M} \) has \( p H= \) 9.6 and \( K_{b}=1.8 \times 10^{-5} \)
Concentration of salt and base
respectively is:
A. \( 0.09 \mathrm{M} \) and \( 0.2 \mathrm{M} \)
B. 0.2 M and 0.09 M
c. \( 0.1 \mathrm{M} \) and \( 0.19 \mathrm{M} \)
D. 0.19 M and 0.1 M | 1 | Chemistry |
Keeping the number of moles, volume and pressure the same, which of the following are the same for all ideal gas?
A. rms speed of a molecule
B. density
c. temperature
D. average of magnitude of momentum | 3 | Physics |
How many 3 -digit even numbers can be formed from the digits 1,2,3,4,5,6 if the digits can be repeated?
A \( \cdot 108 \)
B. 98
c. 72
D. 112 | 2 | Maths |
is a grade between lignite and anthracite.
A. Steam coal
B. Bituminous coal
c. Graphite
D. None of the above | 0 | Biology |
If the position vector of a point (-4,-3)
be \( \vec{a}, \) find \( |\vec{a}| \) | 2 | Maths |
Define RQ. What is its value for fats? | 0 | Biology |
Orbital speed of an artificial satellite very close to earth's surface is V. Its orbital speed at a height equal to three
times the radius of the earth from the
earth's surface is:
\( A \cdot v \)
B. v/2
\( c \cdot 2 v \)
\( D \cdot v / 4 \) | 3 | Physics |
In which of the following era man was originated?
A. Paleocene
B. Pliocene
c. Miocene
D. Devonian | 0 | Biology |
If a simple harmonic motion is represent by \( \frac{d^{2} x}{d t^{2}}+a x=0, \) its time period is
A \( \cdot \frac{2 \pi}{\alpha} \)
в. \( \frac{2 \pi}{\sqrt{\alpha}} \)
\( c \cdot 2 \pi \alpha \)
D. \( 2 \pi \sqrt{\alpha} \) | 3 | Physics |
The process used for purification of
\( A l_{2} O_{3} \cdot 2 H_{2} O \) is:
A . Magnetic separation
B. Froth flotation
c. Leaching
D. Liquation | 1 | Chemistry |
In Ostwald process of manufacturing of \( H N O_{3} \) catalyst used is:
A. Mo
B. Fe
c. мn
D. Pt | 1 | Chemistry |
If 10 million electrons are removed from a
neutral body, then the charge on the body
is :
A \( \cdot 1.2 \times 10^{-12} C \)
B. \( +1.6 \times 10^{-12} C \)
c. \( -1.6 \times 10^{-13} C \)
D. \( 10^{-12} C \) | 3 | Physics |
Which of the following is used to adsorb
water?
A. Silica gel
B. Anhydrous \( C a C l_{2} \)
c. coal
D. coke | 1 | Chemistry |
Calculate, \( \sqrt[4]{-1 \frac{1}{2}-i \frac{\sqrt{3}}{2}} \) | 2 | Maths |
A mass of diatomic gas \( (\gamma=1.4) \) at a
pressure of 2 atm is compressed adiabatically so that its temperature
rise from \( 27^{\circ} \mathrm{C} \) to \( 927^{\circ} \mathrm{C} \). The pressure
of the gas is final state is
A .28 atm
B. 68.7 atm
c. 256 atm
D. 8 atm | 3 | Physics |
An isosceles glass prism with angles
\( 40^{\circ} \) is clamped over a tray of water in a position such that the base is just dipped in water. A ray of light incident normally on the inclined face suffers
total internal reflection at the base. If
the refractive index of water is 1.33 then
the condition imposed on the refractive
index \( \mu \) of the glass is :
A \( . \quad \mu<2.07 \)
в. \( \mu>2.07 \)
c. \( \mu<1.74 \)
D. \( \mu>1.74 \) | 3 | Physics |
The soft-iron core of an electromagnet loses its magnetism once the current passing through the electromagnetic coil stops because
A. Domains lose their alignment when the current is stopped
B. Iron cannot hold alignment for longer time even when the current is passing through the coil
c. Magnetic properties of iron are weak
D. Domains inside the iron get aligned in north to south direction | 3 | Physics |
A circular coil of radius \( 10 \mathrm{cm}, 500 \)
turns and resistance \( 2 \Omega \) is placed with
its plane perpendicular to the horizontal component of the earth's magnetic field
If is rotated about its vertical diameter
through \( 180^{\circ} m \) in \( 0.25 s . \) The current induced in the coil is
(Horizontal component of the earth's magnetic field at that place is \( 3.0 \times \) \( \left.10^{-5} T\right) \)
A \( \cdot 1.9 \times 10^{-3} A \)
A \( .1 .9 \times 10^{-3} \)
B . \( 2.9 \times 10^{-3} A \)
\( \mathbf{c} \cdot 3.9 \times 10^{-3} A \)
D. \( 4.9 \times 10^{-3} A \) | 3 | Physics |
a parallel glass slab at a point \( A, \) as
shown in the given figure. It undergoes partial reflection and
refraction. At each reflection \( 25 \% \) of
incident energy is reflected. The rays
\( A B \) and \( A^{\prime} B^{\prime} \) undergo interference. The
1 max ratio \( \frac{\text { nunce is }}{\text { : }} \) is \( \boldsymbol{I}_{m i} \)
\( A \cdot 4: 1 \)
B. 8: 1
c. 7:
29 | 3 | Physics |
\( 92 U^{238} \rightarrow 82 p b^{206}+8_{2}^{4} H e . \) The number
of \( \beta \) particles released in this reaction
is :
\( \mathbf{A} \cdot \mathbf{6} \)
B. 3
c. 1
D. 10 | 3 | Physics |
State whether true or false.
The line drawn perpendicular to the mirror at the point of incidence is called the reflected ray.
A. True
B. False | 3 | Physics |
For the three events \( A, B \) and \( C, P \)
(exactly one of the events \( \boldsymbol{A} \) or \( \boldsymbol{B} \) occurs \( )=P(\text { exactly one of the events } B \) or \( C \text { occurs })=P( \) exactly one of the events \( C \text { or } A \text { occurs })=p \) and \( P( \) all the
three events occur simultaneously) \( = \)
\( p^{2}, \) where \( 0<p<1 / 2 . \) Then the
probability of at least one of the three events \( A, B \) and \( C \) occurring is
\( ^{\mathrm{A}} \cdot \frac{3 p+2 p^{2}}{2} \)
\( ^{\text {В } \cdot \frac{p+3 p^{2}}{4}} \)
c. \( \frac{p+3 p^{2}}{2} \)
\( \frac{3 p+2 p^{2}}{4} \) | 2 | Maths |
Rhombus PQRB is inscribed in \( \triangle \boldsymbol{A B C} \)
such that \( \angle B \) is one of the its angle, \( P, Q \)
and \( \mathrm{R} \) lie on \( \mathrm{AB}, \mathrm{AC} \) and \( \mathrm{BC} \) respectively. If \( A B=12 \mathrm{cm} \) and \( B C=6 \mathrm{cm} \) find the
sides of rhombus PQRB. | 2 | Maths |
Let \( A=\{1,2,3\} . \) Then number of
relations containing (1,2) and (1,3) which are reflexive and symmetric but not transitive is
A .
B. 2
\( c \cdot 3 \)
D. 4 | 2 | Maths |
Which among the following is/are natural source(s) of organic
compounds?
A . coal
B. natural gas
c. petroleum
D. all of the above | 1 | Chemistry |
When does the truth value of the
statement \( (\boldsymbol{p} \vee \boldsymbol{r}) \Leftrightarrow(\boldsymbol{q} \vee \boldsymbol{r}) \) become
true?
A . p is true, q is true
B. p is false, q is false
c. p is true, r is true
D. Both (1) and (3) | 2 | Maths |
what could be the possible values of \( x \)
when, \( [\mathbf{2 x}]=[\boldsymbol{x}] \) | 2 | Maths |
Differentiate the following with respect
to \( \boldsymbol{x} \)
\( \cos ^{-1}[\sqrt{\frac{1+x}{2}}],-1<x<1 \) | 2 | Maths |
Two cells of emf \( 4 V \) and \( 2 V \) and
internal resistance \( 2 \Omega \) and \( 1 \Omega \)
respectively are connected in parallel so
as to send the current in the same
direction through an external resistance of \( 10 \Omega \). Find the potential difference across \( 10 \Omega \) resistor. | 3 | Physics |
When the temperature of an iron sphere
of mass \( 1 \mathrm{kg} \) falls from \( 30^{\circ} \mathrm{C} \) to \( 25^{\circ} \mathrm{C} \) the 550 calories of heat are released The
heat capacity of iron sphere will be in
cal/o \( _{C} \)
A . 110
B. 220
\( c \cdot 330 \)
D. 440 | 3 | Physics |
Construct a \( \triangle A B C, \) when \( A B= \)
\( A C, B C=6.0 \mathrm{cm} \) and \( \angle B=45^{\circ} \) | 2 | Maths |
If \( f(x)=\left(a x^{2}+b\right)^{3} \) then a function
\( g(x) \) such that \( f(g(x))=g(f(x)) \) is given by
A \( , \quad g(x)=\left(\frac{b-x^{1 / 3}}{a}\right)^{1 / 2} \)
B. \( g(x)=\frac{1}{\left(a x^{2}+b\right)^{3}} \)
c. \( g(x)=\left(a x^{2}+b\right)^{1 / 3} \)
\( g(x)=\left(\frac{x^{1 / 3}-b}{a}\right)^{1 / 2} \) | 2 | Maths |
Find:
\( \lim _{x \rightarrow 0} \frac{\sin x-x+\frac{1}{6} x^{3}}{x^{3}} \) | 2 | Maths |
The number of different 7 -digit telephone numbers that can be formed
by using 0,1,2,3,4,5,6,7,8,9 is :
A \( \cdot 10^{7} \)
B. \( 9 \times 10^{6} \)
\( c .9 ! \)
D. None of these | 2 | Maths |
Separation of isotopes can be made by:
This question has multiple correct options
A. gaseous diffusion
B. thermal diffusion
c. distillation
D. ultra centrifuge
E. electromagnetic separation
F. laser spectrata | 1 | Chemistry |
The element which could be extracted
by electrolytic reduction of its oxide dissolved in a high temperature melt is:
A. sodium
B. magnesium
C. flourine
D. aluminium | 1 | Chemistry |
Molecule which contains only sigma bonds in it is:
A. Pentene
B. Pentane
c. Pentadiene
D. Pentyne | 1 | Chemistry |
Following are the ionisation potential values of :
\( \left(I_{1}\right) 899 k J m o l^{-1},\left(I_{2}\right) 1757 k J m o l^{-1},\left(I_{3}\right. \)
A. Na
B.
c. Ве
D. Ne | 1 | Chemistry |
The specific heat of a metal is 0.16 cal/g approximate atomic weight would be:
A . 40
B. 16
\( c .32 \)
D. 64 | 1 | Chemistry |
Find the value of \( x \) if \( a \) and \( b \) are in
direct proportion
\( \begin{array}{ccccc}a & 2 & 3 & 4 & 5 \\ b & 14 & 21 & x & 35\end{array} \)
A . 16
в. 25
c. 27
D. 28 | 2 | Maths |
The equations \( a x+b y+c=0 \) and
\( \boldsymbol{d} \boldsymbol{x}+\boldsymbol{e} \boldsymbol{y}+\boldsymbol{f}=\boldsymbol{0} \) represent the same
straight line if and only if
A \( \cdot \frac{a}{d}=\frac{b}{c} \)
в. \( c=f \)
c. \( \frac{a}{d}=\frac{b}{e}=\frac{c}{f} \)
D. \( a=d, b=e, c=f \) | 2 | Maths |
The heat of combustion of \( C H_{4}(g), C \)
(graphite) and \( H_{4}(g) \) are respectively \( -20 k . c a l,-40 k . c a l \) and \( -10 k . c a l . \) The heat
of formation of \( \mathrm{CH}_{4} \) is
A. \( -40 K \). cal
в. \( +40 K . c a l \)
c. \( -80 K . c a l \)
D. \( +80 K . c a l \) | 1 | Chemistry |
Q Type your question
\( \mathbf{A} \cdot 2 C H_{3} C O O H+N a_{2} C O_{3} \rightarrow 2 C H_{3} C O O N a+H_{2} O+ \)
\( C O_{2} \) (Test tube \( B \) )
\( \left.C a(O H)_{2}+C O_{2} \rightarrow C a C O_{3}+H_{2} O \text { (Test tube } A\right) \)
B \( \cdot 2 C H_{3} C O O H+N a_{2} C O_{3} \rightarrow 2 C H_{3} C O O N a+H_{2} O+ \)
\( C O_{2}(\text { Test tube } A) \)
\( \left.C a(O H)_{2}+C O_{2} \rightarrow C a C O_{3}+H_{2} O \text { (Test tube } B\right) \)
\( \mathbf{c} \cdot C H_{3} C O O H+N a_{2} C O_{3} \rightarrow C H_{3} C O O N a+H_{2} O+ \)
\( C O_{2}(\text { Test tube } A) \)
\( \left.C a(O H)_{2}+C O_{2} \rightarrow C a C O_{3}+H_{2} \text { (Test tube } B\right) \)
D \( \cdot 2 C H_{3} C O O H+N a_{2} C O_{3} \rightarrow 2 C H_{3} C O O N a+H_{2} O+ \)
\( C O \text { (Test tube } A) \)
\( \left.\mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{CO}_{2} \rightarrow \mathrm{CaCO}_{3}+\mathrm{H}_{2} \mathrm{O} \text { (Test tube } B\right) \) | 1 | Chemistry |
Substances that are not broken down by
biological processes are said to be | 0 | Biology |
A capacitor consists of two metal plates each \( 10 \mathrm{cm} \) by \( 20 \mathrm{cm} ; \) they are separated by a 2.0 mm thick insulator
with dielectric constant 4.1 and
dielectric strength \( 6.0107 \mathrm{V} / \mathrm{m} . \) What is
the capacitance in \( \boldsymbol{p} \boldsymbol{F}\left(\mathbf{1 0}^{-12} \boldsymbol{F}\right) ? \)
A . 75
B. 100
\( c \cdot 240 \)
D. 360 | 3 | Physics |
What is the cellulose made part that
encircle the cell? | 1 | Chemistry |
Find the equation of line passing through \( (5,0,5) \&(2,1,3) . \) Also show that \( (5,0,5),(2,1,3) \&(-4,3,-1) \) are
collinear. | 2 | Maths |
A device used for detecting small currents due to changing magnetic field is known as:
A. Galvanometer
B. Ammeter
c. Voltmeter
D. Potentiometer | 3 | Physics |
\( S_{1}, S_{2} \) are two coherent sources (having
initial phase difference zero) of sound
located along \( x- \) axis separated by \( 4 \lambda \)
where \( \lambda \) is wavelength of sound emitted
by them. Number of maxima located on
the elliptical boundary around it will be :
A . 16
B. 12
\( c \)
\( D .4 \) | 3 | Physics |
The burning of fossil fuels is the main source of which of the following pollutants?
A. Nitrogen
B. Carbon monoxide
c. Sulphur dioxide
D. Particulate matter | 1 | Chemistry |
A magnetic moment of \( 1.73 B M \) will be
shown by one among of the following compounds:
\( \mathbf{A} \cdot\left[C u\left(N H_{3}\right)_{4}\right]^{2+} \)
B : \( \left[N i(C N)_{4}\right]^{2-} \)
\( \mathrm{c} \cdot \operatorname{Ti} \mathrm{Cl}_{4} \)
D \( \cdot\left[\mathrm{CoCl}_{6}\right]^{-3} \) | 1 | Chemistry |
The solubility of \( N a C l(s) \) in water at
\( 298 K \) is about 6 moles per litre.
Suppose you add 1 mole of \( N a C l(s) \) to a litre of water. For the reaction:
\( N a C l(s)+H_{2} O \rightarrow N a C l(a q) \)
A. \( \Delta G>0, \Delta S>0 \)
в. \( \Delta G<0, \Delta S>0 \)
c. \( \Delta G>0, \Delta S<0 \)
D. \( \Delta G<0, \Delta S<0 \) | 1 | Chemistry |
The area enclosed by a hysteresis loop is a measure of
A. retentivity
B. susceptibility
c. permeability
D. energy loss per cycle | 3 | Physics |
The radial probability distribution curve obtained for an orbital wave function
\( (\mathbf{\Psi}) \) has \( \mathbf{3} \) peaks and 2 radial nodes. The
valence electron of which one of the
following metals does this wave
function \( (\Psi) \) correspond to?
A . \( C o \)
в. \( L i \)
c. \( K \)
D. Na | 1 | Chemistry |
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