Physics Induction and Photoelectric Effect Quiz
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Questions and Answers

How many unpaired electrons are present in $[Mn(H2O)6]^{2+}$ considering water as a weak field ligand? (Atomic number of Mn = 25)

  • Three (correct)
  • Two
  • Four
  • Five
  • Which gas is evolved when carboxylic acids react with strongly electropositive metals like Na, K, Ca, Zn?

  • CO2
  • H2 (correct)
  • O2
  • H2O vapor
  • Which reagents are required in the conversion of phenol to salicylic acid?

  • Na2Cr2O7, H2SO4
  • HNO2, HCl, K2Cr2O7
  • CHCl3 + aq. NaOH, H+ (correct)
  • NaOH, CO2, H+
  • What type of unit cell does Polonium have?

    <p>Hexagonal</p> Signup and view all the answers

    For the electrolytic purification of copper with zinc impurity, what are the appropriate electrodes?

    <p>Impure zinc cathode, Impure sample anode</p> Signup and view all the answers

    Which nitrogen oxide exists as a blue solid and a brown gas?

    <p>$NO_2$</p> Signup and view all the answers

    What is the probability that a random variable X falls between 0.5 and 1.5, given its p.d.f. is $f(x) = \frac{1}{2}$ for $0 \" \leq x \" \leq 2$?

    <p>3/4</p> Signup and view all the answers

    For the equation $2x^2y^2 + 2 = 1$, what values of b, c, and d would represent a circle passing through the origin?

    <p>b = 2, c = 0, d = 0</p> Signup and view all the answers

    What does the expression ~(pq) simplify to?

    <p>~p ^ q</p> Signup and view all the answers

    What does the velocity of emitted photoelectrons depend upon?

    <p>Frequency of incident photons</p> Signup and view all the answers

    If f(x) is defined as f(x) = x - x^2 for x ≠ 0 and f(x) = 2 when x = 0, what can be concluded about the continuity of f(x) at x = 0?

    <p>f(x) is discontinuous at x = 0</p> Signup and view all the answers

    If the radius of a soap bubble is doubled under isothermal conditions, what is the energy spent in this process?

    <p>$16\pi r^2 T$</p> Signup and view all the answers

    In a microscope where a magnification of 400 is required, with a tube length of 15 cm and an objective focal length of 0.5 cm, what focal length of eye-piece should be used?

    <p>0.49 cm</p> Signup and view all the answers

    If p, q, and r are all false, which logical statement holds true?

    <p>(~p ^ ~q)</p> Signup and view all the answers

    If two small spheres of radii $r$ and $3r$ fall through a viscous liquid at a constant speed, what is the ratio of the viscous force experienced by them?

    <p>3 : 1</p> Signup and view all the answers

    If the eccentricity of two ellipses $\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$ and $\frac{x^2}{2} + \frac{y^2}{2} = 1$ are equal, what is the value of a/b?

    <p>3/7</p> Signup and view all the answers

    In the reaction given, which compounds correspond to A, B, and C? (CH 27.CO)

    <p>Acetanilide, p-nitroacetanilide, and p-nitroaniline respectively</p> Signup and view all the answers

    Which of the following is NOT an electrophile?

    <p>$O_2$</p> Signup and view all the answers

    In the context of explosion, what is the correct total energy released?

    <p>2mV2</p> Signup and view all the answers

    When a square plate is allowed to fall up to the x-y plane from the x-z plane, what is the final angular velocity?

    <p>24g/7a^(1/2)</p> Signup and view all the answers

    If a particle is projected vertically upwards from Earth's surface with kinetic energy equal to half the minimum escape energy, how high does it rise above the surface?

    <p>h = 2.5R</p> Signup and view all the answers

    In a large container with a small hole, which gas has a greater molecular weight between H2Te and H2S?

    <p>H2Te &gt; H2S</p> Signup and view all the answers

    What happens to a square plate of mass M when it is hinged at point A and allowed to rotate about the x-axis?

    <p>It rotates about the x-axis</p> Signup and view all the answers

    Which compound produces an oil nitrosoamine on reaction with aqueous nitrous acid at low temperature?

    <p>Aniline</p> Signup and view all the answers

    The reaction of sulphur with concentrated NaOH forms which of the following compounds?

    <p>H2SO4 and Na2S</p> Signup and view all the answers

    Which statement is INCORRECT?

    <p>Li2O and MgO form super oxides on reaction with excess of O2</p> Signup and view all the answers

    Which species has a bond order of one?

    <p>H2</p> Signup and view all the answers

    According to the mentioned law, the osmotic pressure of a dilute solution is directly proportional to the absolute temperature when the concentration remains constant. Which law is being referred to?

    <p>van’t Hoff-Boyle’s</p> Signup and view all the answers

    In Clemmensen’s reaction, what product is obtained when a ketone is used as a reactant?

    <p>Alkane</p> Signup and view all the answers

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