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A temperature difference of \( 27^{\circ} \mathrm{C} \) on the Kelvin scale is equal to a difference of : \( \mathbf{A} \cdot 27 K \) B . \( 300 K \) c. -246K-246K D. zero
3
Physics
Greenhouse effect is a major cause of: A . global warming B. reduction of temperature c. acid rain D. all of above
1
Chemistry
A particle moves along a straight line such that its displacement \( s \) at any time \( t \) is given by \( s=t^{3}-6 t^{2}+3 t+ \) \( 4 m, t \) being is seconds. Find the velocity of the particle when the acceleration is zero.
2
Maths
In plant relations, \( \Psi \) indicates A. DPD B. Solute potential c. water potential D. Suction pressure
0
Biology
Examples of antipyretics are: This question has multiple correct options A. paracetamo B. morphine C. Barbituric acid D. para-amino phenol
1
Chemistry
Graph between \( \log \left(\frac{x}{m}\right) \) and \( \log p \) is a straight line at an angle \( 45^{\circ} \) with intercept on y-axis \( 0,3010 . \) Calculate the amount of gas adsorbed in gram per gram of the adsorbent when pressure is 0.2 atm. A . 0.4 B. 0.6 c. 0.8 D. 0.2
1
Chemistry
Here are some words translated from an artificial language mie pie is blue light mie tie is blue berry aie tie is raspberry Which words could possibly mean "light fly"? A. pie zie B. pie mie c. aie zie D. aie mie
2
Maths
Resistance of conductor is doubled keeping the potential difference across it constant. The rate of generation of heat will: A. become one fourth B. be halved c. be doubled D. become four times
3
Physics
The density of a gass is 3.80 g \( L^{-1} \) at S.T.P calculate is density at \( 27^{0} C \) and 700 torr pressure.
1
Chemistry
The cells surrounding the stomatal pore are A. Gurad cells B. Subsidiary cell c. chromophil cells D. None of the above
0
Biology
Evaluate \( \int_{0}^{\pi / 2} \frac{\cos x}{\left(1+\sin ^{2} x\right)} d x \) A \( \cdot \frac{\pi}{2} \) B. \( \frac{\pi}{4} \) c. \( \pi \) D. None of these
2
Maths
In n-type semiconductor, the Fermi level is present: A. just below the valence band B. just below the conduction band C. just above the valence band D. in the middle of valence and conduction bands
3
Physics
If the angles of a triangle \( A B C \) are in \( \boldsymbol{A} \cdot \boldsymbol{P} \) \( \boldsymbol{a}=\mathbf{2}, \boldsymbol{c}=\mathbf{4}, \) then \( \boldsymbol{b}= \) A \( \cdot 2 \sqrt{3} \) 3 B. \( \sqrt{21} \) c. 8 D. 14
2
Maths
How does a Sonar work? Explain. Mention its uses
3
Physics
Let \( f(x)=\tan 2 x \cdot \tan 3 x \cdot \tan 5 x, \) then \( \boldsymbol{f}^{\prime}(\boldsymbol{\pi}) \) equals A . 10 B. -10 \( c .0 \) D.
2
Maths
Rapid deep breathing is A. Dyspnoea B. Hypopnoea c. Hyperpnoea D. None of the above
0
Biology
Find modulus of following \( (\mathrm{i}) \pm(4+3 i) \) \( (\mathrm{ii}) \pm \sqrt{2}+0 i \) (iii) \( \mathbf{0} \pm \sqrt{\mathbf{2}} \boldsymbol{i} \)
2
Maths
The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two forces. The angle between the two forces is: A \( \cdot 120^{\circ} \) B . 135 \( c .90^{\circ} \) D. \( 150^{\circ} \)
3
Physics
\( \boldsymbol{n} / \boldsymbol{m} \) means that \( \boldsymbol{n} \) is factor of \( \boldsymbol{m}, \) then the relation ' \( \boldsymbol{f}^{\prime} \) is. B. Transitive and symmetricc C. reflexive, transitive and symmetric D. Reflexive,transitive and not symmetric
2
Maths
Check the continuity of \( f \) given by \[ f(x)=\left\{\begin{array}{ccc} 4-x^{2} & \text { if } & x \leq 0 \\ x-5 & \text { if } & 0<x \leq 1 \\ 4 x^{2}-9 & \text { if } & 1<x<2 \\ 3 x+4 & \text { if } & x \geq 2 \end{array}\right. \] the points 0,1 and 2
2
Maths
A concave mirror forms an erect image of an object placed at a distance of 10 \( \mathrm{cm} \) from it. The size of the image is double that of the object. Where is the image formed? A. 20 cm behind the mirror B. 20 cm in front of the mirror c. \( 40 \mathrm{cm} \) behind the mirror D. \( 40 \mathrm{cm} \) in front of the mirror
3
Physics
Catalytic decomposition of nitrous oxide by gold at \( 900^{\circ} \mathrm{C} \) at an initia pressure of \( 200 m m \) was \( 50 \% \) in 53 minutes and \( 73 \% \) in 100 minutes. (a) What is the order of reaction? (b) How much it will decompose in 100 minutes at the same temperature but at an initial pressure of 600 mm?
1
Chemistry
The process of glycolysis can be represented as A. \( C_{6} H_{12} O_{6} \rightarrow 2 C_{3} H_{4} O_{3}+4 H \) B. \( C_{6} H_{12} O_{6}+6 C O_{2} \rightarrow 6 C O_{2}+6 H_{2} O \) \( \mathrm{c} \cdot 6 H_{2} O+6 C O_{2} \rightarrow C_{6} H_{12} O_{6}+6 O_{2} \) D. None of the above
0
Biology
Which orbital is represented by wave function \( \Psi_{310} ? \) A \( \cdot 3 d_{x y} \) B . \( 3 p_{z} \) \( c \cdot 4 s \) D. \( 4 d_{z} \)
1
Chemistry
A long wire carrying current \( i \) is placed close to a U-shaped conductor (of negligible resistance). A wire of length \( l \) as shown in figure slides with a velocity v. Find the current induced in the loop as a function of distance \( x \) from the current carrying wire to slider. A \( \cdot \frac{\mu_{0} i l u}{R x} \) в. \( \frac{\mu_{0} i l u}{2 \pi R x} \) c. \( \frac{\mu_{0} i l u}{2 R x} \) D. \( \frac{\mu_{0} i l u}{4 \pi R x} \)
3
Physics
Cell-tissue organisation occurs in A. Fasciola B. Sycon c. Hydra D. Asterias
0
Biology
Which of the following can be expressed as the sum of square of two positive integers, as well as three positive integers? A . 75 в. 192 \( c \cdot 250 \) D. 100
2
Maths
Four students were given colourless liquids \( A, B, C \) of water, lemon juice and a mixture of water and lemon juice respectively. After testing these liquids with pH paper, following sequence in colour change of pH paper were reported: I. Blue, Red and Green Il. Orange, Green and Green III. Purple, Red and Green IV.Green, Red and Red The correct sequence of colours observed is \( A \) B. II c. ॥॥ D. IV
1
Chemistry
The landthanide contraction is responsible for the fact that: A. \( Z r \) and \( Y \) have almost the same radius. B. \( Z r \) and \( N b \) have similar oxidation state c. \( Z r \) and \( H f \) have almost the same radius D. \( Z r \) and \( Z n \) have the same oxidation state.
1
Chemistry
A radioactive element has rate of disintegration 10,000 disintegrations per minute at a particular instant. After four minutes it becomes 2500 disintegrations per minute. The decay constant per minute is A \( \cdot 0.2 \log _{e}^{2} \) B . \( 0.5 \log _{e}^{2} \) c. \( 0.6 \log _{e}^{2} \) D. \( 0.8 \log _{e}^{2} \)
3
Physics
A galvanometer of resistance \( 50 \Omega \) giving full scale deflection for a current of 10 milliampere is to be changed into a voltmeter of range \( 100 \mathrm{V} \) A resistance of \( _{-1}-\ldots_{\text {has to be }} \) connected in series with the galvanometer. A . 9950 B. 10025 c. 10000 D. 9975
3
Physics
Give two characteristics of magnetic field lines.
3
Physics
What are dimensional variables?
1
Chemistry
Atmospheric electricity is generated due to A. the accumulation of static charges B. the accumulation of moving charges C. the destruction of static charges D. destruction of moving charges
3
Physics
When a flute is blown, the air inside it gets compressed and produces sound but does not vibrate. True or false. A. True B. False
3
Physics
In the adjoining figure, parallel lines are shown with similar markings. Find \( \angle x \) if \( \angle x=5 \angle y \) \( \mathbf{A} \cdot 30^{\circ} \) B. \( 60^{\circ} \) c. \( 150^{\circ} \) D. \( 170^{\circ} \)
2
Maths
Which is the condition, unrelated to quantities, that indicates that the rate going into solution is equal to the rate coming out of solution? A . Dilute B. concentrated c. Unsaturated D. Saturated E. Supersaturated
1
Chemistry
Is 0.3 the multiplicative inverse of \( 3 \frac{1}{3} ? \) Why or why not?
2
Maths
A dynamo developed \( 0.5 A \) at \( 6 V \). Find the energy it generates in 1 s.
3
Physics
Differentiate between: Haemoglobin and leghaemoglobin
0
Biology
The elements with atomic numbers 10,18 belong to the same group. A. True B. False
1
Chemistry
A train moving with a velocity of \( 20 m s^{-1} \) is brought to rest by applying the brakes in 5 s. Calculate the retardation \( \mathbf{A} \cdot 4 m s^{-2} \) B \( \cdot 2 m s^{-2} \) \( \mathrm{c} \cdot 1 \mathrm{ms}^{-2} \) D. \( 8 m s^{-2} \)
3
Physics
Explain: A: Combustion is an exothermic process. B: Combustion is a spontaneous process
1
Chemistry
Find the area of the region enclosed by the curves; \( \boldsymbol{y}=\cos \boldsymbol{x}, \boldsymbol{y}=1-\frac{2 x}{\pi} \) A \( \cdot 2-\frac{\pi}{2} \) в. \( \pi \) c. \( \frac{\pi}{2} \) D.
2
Maths
In a Young's double slit experiment, the fringes are displaced by a distance \( x \) when a glass plate of refractive index 1.5 is introduced in the path of one of the beams. Then this plate is replaced by another plate of the same thickness, the shift of fringes is \( \frac{3}{2} x . \) The refractive index of the second plate is : A . 2.25 в. 2.0 c. 1.75 D. 1.25
3
Physics
If the radius of the Earth were increased by a factor of 2 and its mass remained the same, then the acceleration due to gravity on the Earth would A. reduce by factor 4 B. reduce by factor 2 c. not change D. none of the above
3
Physics
\( \lim _{x \rightarrow 0} \tan \left(\frac{\pi}{4}+x\right) \)
2
Maths
The area of triangle formed by the lines \( 18 x^{2}-9 x y+y^{2}=0 \) and the line \( y=9 \) is A. \( \frac{27}{4} \) в. \( \frac{27}{2} \) c. \( \frac{27}{8} \) D. 27
2
Maths
In the figure shown, coefficient or restitution between \( A \) and \( B \) is \( e=\frac{1}{2} \) then This question has multiple correct options A \cdot velocity of B after collision is \( \frac{v}{2} \) B. Impulse between two during collision is \( \frac{3}{4} m v \) c. Loss of kinetic energy during the collision is \( \frac{3}{16} m v^{2} \) D. Loss of kinetic energy during the collision is \( \frac{1}{4} m v^{2} \)
3
Physics
The growth of tendril in pea plant is due to A. Effect of light B. Effect of gravity c. Rapid cell divisions in tendrillar cells that are away from the support D. Rapid cell divisions in tendrillar cells in contact with the support
0
Biology
For a first order reversible reaction \( A_{K_{b}}^{K_{f}} B, \) the initial concentration of \( A \) and \( B \) are \( [A]_{0} \) and zero respectively. If concentrations at equilibrium are \( [\boldsymbol{A}]_{e q} \) and \( [\boldsymbol{B}]_{e q} ., \) derive an expression for the time taken by \( B \) to attain concentration equal to \( [\boldsymbol{B}]_{e q / 2} \)
1
Chemistry
Find the value of \( y, \) if \( x=5^{\circ} \) \( A \cdot 50 \) 3.45 \( c \cdot 32^{2} \) .38 \( ^{2} \)
2
Maths
In which of the following pairs is there the greatest difference in the oxidation numbers of the underlined elements? A. \( \underline{N} O_{2} \) and \( N_{2} O_{4} \) B. \( P_{2} O_{5} \) and \( P_{4} O_{00} \) c. \( \underline{N}_{2} \mathrm{O} \) and \( \underline{\mathrm{N}} \mathrm{O} \) \( \mathrm{D} \cdot \underline{S} \mathrm{O}_{2} \) and \( \underline{S} \mathrm{O}_{3} \)
1
Chemistry
Extremely dangerous and deadly cardiac glycosides are carried from the milkweed plant by the? A. Night cockroaches B. Bumble bee c. Larvae of the monarch butterfly D. Green grasshopper
1
Chemistry
Choose the correct combination of labeling of the lenticel A . a-pore, b-complementary cells, c-cork, d-cork cambium, e-secondary cortex B. a-pore, b-secondary cortex, c-cork, d-cork cambium, e complementary cells c. a-pore, b-cork cambium, c-secondary cortex, d-cork. complementary cells D. a-pore, b-cork, c-complementary cells, d-cork cambium, e-secondary cortex E. a-pore, b-cork, c-cork cambium, d-secondary cortex, ecomplementary cells
0
Biology
If \( n=10, \bar{x}=12 \) and \( \sum x^{2}=1530 \) then calculate the coefficient of variation. A . 20 B . 25 c. 30 D. 35
2
Maths
There are three boxes, each containing a different number of light bulbs. The first box has 10 bulbs, of which four are dead, the second has six bulbs, of which one is dead, and the third box has eight bulbs of which three are dead. What is the probability of a dead bulb being selected when a bulb is chosen at random from one of the three boxes? A. \( \frac{115}{330} \) В. \( \frac{113}{360} \) c. \( \frac{113}{330} \) D. None of these
2
Maths
Component of \( \vec{a}=\hat{i}-\hat{j}-\hat{k} \) perpendicular to the vector \( \overrightarrow{\boldsymbol{b}}=2 \hat{\boldsymbol{i}}+ \) \( \hat{\boldsymbol{j}}-\hat{\boldsymbol{k}} \) is? A \( \cdot \frac{1}{3}(\hat{i}+2 \hat{j}+2 \hat{k}) \) B \( \cdot \frac{1}{3}(\hat{i}-4 \hat{j}-2 \hat{k}) \) c \( \cdot \frac{1}{3}(\hat{i}+4 \hat{j}+2 \hat{k}) \) D \( \cdot \frac{1}{3}(\hat{i}+2 \hat{j}+\hat{k}) \)
2
Maths
Rain is falling vertically and a man is moving with velocity \( 6 m s^{-1} \). Find the angle at which the man should hold his umbrella avoid getting wet.
3
Physics
Assertion Human ancestors never used their tails and so the tail expressing gene has disappeared in them. Reason Lamarck's theory of evolution is popularly called theory of continuity of germplasm. 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
Fill in the blanks The distance between the eye lens and retina is about
3
Physics
Graph between log \( \mathrm{K} \) and \( \frac{1}{T}[\text { Where } \mathrm{K} \) is rate constant \( \left(S^{-1}\right) \) and \( T \) is temperature (K)] is a straight line with \( \boldsymbol{O} \boldsymbol{X}=\mathbf{5}, \boldsymbol{\theta}=\boldsymbol{t a n}^{-1}\left[-\frac{\mathbf{1}}{\mathbf{2 . 3 0 3}}\right] \) Hence \( E_{a} \) and log A respectively will be: A \( .2 .303 \times 2 c a l, 5 \) B . \( \frac{2}{3.303} \) cal \( , e^{5} \) c. 2 cal, 5 D. None of these
1
Chemistry
Nucleic acids are polymer of A. Nucleotides B. Nucleosides C. Amino acids D. Nitrogen bases
0
Biology
find the sum : tan \( x \) tan \( 2 x+ \) \( \tan 2 x \tan 3 x+\dots \dots \dots+\dots \) \( \tan n x \tan (n+1) x \)
2
Maths
\( \lim _{x \rightarrow 0} \frac{x}{\sqrt{x+4}-2} \) is equal to \( \mathbf{A} \cdot \mathbf{4} \) B. \( \sqrt{2} \) c. \( 2 \sqrt{2} \) D.
2
Maths
suppose 0 \[ \text { 135 } \quad 342 \] \[ t(\min ) \] and [Cone] 1.91 mol \( L^{-1} \quad \) 2.08 1.67 Find out the order of reaction and calculate its rate constants
1
Chemistry
What is the ratio of the shortest wavelength of the Balmer series to the shortest wavelength of the Lyman series \( ? \) \( A \cdot 4: \) B. 4: 9 \( c \cdot 4: 3 \) D. 5 : 9
3
Physics
The wavelength of monochromatic light is \( 5000 A \) in air what will be its wave number in a medium of refractive index \( \mathbf{1 . 5} ? \) A \( \cdot 3 \times 10^{6} m^{-1} \) В. \( 5 \times 10^{6} m^{-1} \) c. \( 2 \times 10^{6} m^{-1} \) D. \( 9 \times 10^{6} m^{-1} \)
3
Physics
Which is not an example of cytoplasmic inheritance? A. Female sterility in maize B. Sigma particle inheritance c. Kappa particle inheritance D. Plastid inheritance
0
Biology
In the shown arrangement of the experiment of the meter bridge if \( \mathrm{AC} \) corresponding to null deflection of galvanometer is \( x, \) what would be its value if the radius of the wire \( \mathrm{AB} \) is doubled :- \( A \) в. \( \frac{x}{4} \) \( c \cdot 4 x \) \( D \cdot 2 \)
3
Physics
The value of \( \int e^{2 x}\left(\frac{1}{x}-\frac{1}{2 x^{2}}\right) d x \) is \( ^{A} \cdot \frac{e^{2 x}}{2}+c \) B. \( \frac{e^{2 x}}{2 x}+c \) c. \( \frac{e^{2 x}}{3 x}+c \) D. \( \frac{e^{2 x}}{x}+c \)
2
Maths
The octet rule is not obeyed by which of the following molecule: A. \( C O_{2} \) в. \( H_{2} \) о \( c \cdot O_{2} \) D. \( C O \)
1
Chemistry
In Freundlich isotherm, \( \frac{x}{m} \propto P^{a} \). Find the value of \( a \) from the following graph. \( A \cdot \frac{2}{3} \) B. \( \frac{1}{3} \) \( c \cdot \frac{3}{2} \) \( D \)
1
Chemistry
Two particles \( A \) and \( B \) initially at rest move towards each other under a mutual force of attraction. The speed of center of mass at the instant when the speed of \( A \) is \( v \) and the speed of \( B \) is \( 2 v \) is \( A \) B. Zero c. \( 2 v \) D. \( \frac{3 v}{2} \)
3
Physics
Differentiate the following function w.r.t. \( x: \cos ^{-1}\left(1-2 \sin ^{2} x\right) \)
2
Maths
Plant cells are rigid due to the presence of A. Cell membrane B. Cell wall c. cytoskeleton D. chloroplasts E. Centrioles
0
Biology
Odd one out among the following is: A. Tartaric acid B. Oxalic acid c. Citric acid D. Prussic acid
1
Chemistry
If \( A \) and \( B \) are two events in a sample space \( S \) such that \( P(A) \neq 0 \) and \( \boldsymbol{P}(\boldsymbol{B}) \neq \boldsymbol{0}, \) then \( \boldsymbol{P}(\boldsymbol{A} \cap \boldsymbol{B}) \) A \( \cdot P(A) \cdot P(B) \) в. \( P(A) . P\left(\frac{B}{A}\right) \) \( \mathbf{c} \cdot P(B) \) D \cdot \( P(A) \)
2
Maths
\( \boldsymbol{A}=\left[\begin{array}{cc}\mathbf{1} & \mathbf{2} \\ \mathbf{3} & \mathbf{2} \\ \mathbf{- 1} & \mathbf{0}\end{array}\right], \boldsymbol{B}=\left[\begin{array}{ccc}\mathbf{1} & \mathbf{3} & \mathbf{2} \\ \mathbf{4} & \mathbf{- 1} & \mathbf{3}\end{array}\right], \) then order of \( A B \) is A. \( 2 \times 2 \) в. \( 3 \times 3 \) \( c \cdot 1 \times 3 \) D. \( 3 \times 2 \)
2
Maths
Figure shows three points \( A, B \) and \( C \) in a region of uniform electric field \( \vec{E} \). The line \( A B \) is perpendicular and \( B C \) is parallel to the field lines. Then which of the following holds good. Here \( \boldsymbol{V}_{\boldsymbol{A}}, \boldsymbol{V}_{\boldsymbol{B}} \) and \( V_{C} \) represents the electric potential at point \( A, B \) and \( C \) respectively. \( \mathbf{A} \cdot V_{A}=V_{B}=V_{C} \) B \( \cdot V_{A}=V_{B}>V_{C} \) \( \mathbf{c} \cdot V_{A}=V_{B}<V_{C} \) \( \mathbf{D} \cdot V_{A}>V_{B}=V_{C} \)
3
Physics
If 1 lies between the roots of the equation \( y^{2}-m y+1=0 \) and \( [x] \) is the GIF function, then the value of \( \left[\left(\frac{4|x|}{|x|^{2}+16}\right)^{m}\right], \) is \( \mathbf{A} \cdot \mathbf{0} \) B. \( c \cdot 2 \) D. None of the above
2
Maths
Who will spend more electrical energy \( \mathbf{5 0 0} \) w tv set in 30 mins as 600 heater in 20 minutes?
3
Physics
For a given voltage \( V \), if resistance is changed from \( R \) to \( \left(\frac{R}{n}\right), \) power consumed changes from \( P \) to: \( A \cdot n P \) B. \( \frac{p}{n} \) \( c \cdot n^{2} p \) D. \( \frac{P}{n^{2}} \)
3
Physics
In astronomical observations signals observed from the distant stars are generally weak. If the photon detector receives a total of \( 3.15 \times 10^{-18} \) J from the radiations of 600 nm. Calculate the number of photons received by the detector. A . 20 B. 10 \( c \cdot 8 \) D.
1
Chemistry
A cell supplies a current of \( 0.9 \mathrm{A} \) through a \( 2 \Omega \) resistor and a current of \( 0.3 \mathrm{A} \) through a \( 7 \Omega \) resistor. The internal resistance of the cell is :- A . \( 1.0 \Omega \) в. \( 0.5 \Omega \) c. \( 2.0 \Omega \) D. \( 1.2 \Omega \)
3
Physics
The nature of the bond in diamond is: A. ionic B. covalent c. matallic D. coordinates covelent
1
Chemistry
The IUPAC name of the following compound \( \boldsymbol{C H}_{2}=\boldsymbol{C H}-\boldsymbol{C H}_{2}-\boldsymbol{C H}_{3} \) is:
1
Chemistry
What is the correct dimension of Newton? \( \mathbf{A} \cdot\left[M L T^{-2}\right] \) В \( \cdot\left[M L T^{-1}\right] \) c. \( \left[M L^{2} T^{-2}\right] \) D. \( [M L T] \)
1
Chemistry
Holotype is A. Specimen used by author as nomenclature type. B. Specimen referred alog with original description. C. Duplicate of nomenclature type. D. Specimen selected from original, when nomeclature type is missing.
0
Biology
According to Susruta Samhita, Virudha consisted of A. Flowering plants. B. Shrubs c. osadhi D. Jangama.
0
Biology
Calculate the wavelength of the radiation which would cause the photodissocitaion of chlorine molecule if the \( C l-C l \) bond energy is \( 243 k J \) \( m o l^{-1} \)
1
Chemistry
When sodium peroxide is treated with water, the product obtained contains: This question has multiple correct options \( A \cdot O_{2} \) в. \( N a \) \( \mathrm{c} \cdot \mathrm{H}_{2} \) D. \( N a^{+} \)
1
Chemistry
Find the angle, if its complement is one- fourth of its supplement.
2
Maths
Ascending imbricate corolla is found in A. Pisum or Papilionadae B. Tamarindus or Caesalpinioideae c. Mimosa or Mimosoideae D. Datura or Solanaceae
0
Biology
Statement: The product formed when \( \boldsymbol{P H}_{3} \) reacts with aqueous \( \boldsymbol{C u}^{2+} \) is \( \boldsymbol{H}_{3} \boldsymbol{P} \boldsymbol{O}_{4} \) State true or false.
1
Chemistry
Answer the following questions with respect to the compound \( N O\left[B F_{4}\right] \) (P) Bond order of the part underline. (Q) Total number of \( \sigma \) bonds in the compound. (R) Total number of \( \pi \) bonds in the compound. (S) Number of hybrid orbitals involved in the hybridisation of boron.
1
Chemistry
State whether the given statement is true or false: \( K O_{2}, B a O_{2}, N a_{2} O_{2} \) are superoxides. A. True B. False
1
Chemistry
Fill in the blanks with appropriate words. Digestion of \( \ldots \ldots \) begins in the mouth.
0
Biology
The structure of \( X e O F_{4} \) is: A. trigonal bipyramidal B. square planar c. square pyramidal D. pyramidal
1
Chemistry
(i) Why is a cathode ray tube evacuated to a low pressure? (ii) What happens if the negative potential is changed on a grid?
3
Physics