Description : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` state of the hydrogen atom is
Last Answer : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` ... . 13.6 eV C. 6.8 eV D. 3.4 eV
Description : One energy difference between the states `n = 2` and `n= 3` is `"E eV"`, in hydrogen atom. The ionisation potential of `H` atom is -
Last Answer : One energy difference between the states `n = 2` and `n= 3` is `"E eV"`, in hydrogen atom. The ionisation potential ... B. 5.6 E C. 7.2 E D. 13.2 E
Description : Ionisation potential applied across the electrodes of electrostatic tar precipitator is around (A) 230 V AC (B) 60 KV AC (C) 230 V DC (D) 60 KV DC
Last Answer : (D) 60 KV DC
Description : Ionisation potential employed in the industrial electrostatic precipitator is of the order of (A) 30 to 70 kV DC (B) 30 to 70 kV AC (C) 230 V AC (D) 230 V DC
Last Answer : (A) 30 to 70 kV DC
Description : The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is?
Last Answer : 5x/36
Description : Give reason: Sodium atom has lower ionisation energy than chlorine atom.
Last Answer : Sodium is in the 1 st group whereas chlorine is in 17 th group. Atomic size decreases down the group. We know that Ionisation energy increases with decrease in atomic size. Hence sodium atom has lower ionisation energy than that of chlorine atom.
Description : An atom bomb works on the principle of (A) Nuclear fission (B) Nuclear fusion (C) Both the nuclear fission & fusion (D) Ionisation
Last Answer : Option A
Description : Ionisation potential is very low for
Last Answer : Ionisation potential is very low for A. Xe B. Ne C. He D. Ar
Description : The element having highest ionisation potential is
Last Answer : The element having highest ionisation potential is A. H B. N C. O D. He
Description : In a period from Li to F, ionisation potential – (1) cannot be predicted (2) increases (3) decreases (4) remains same
Last Answer : (1) cannot be predicted
Description : In a period from Li to F, ionisation potential (1) cannot be predicted (2) increases (3) decreases (4) remains same
Last Answer : cannot be predicted
Description : A hydrogen atom in a state of binding energy 0.85 eV makes a transition to a state of excitation energy of 10.2 eV . Find the energy and wavelength of
Last Answer : A hydrogen atom in a state of binding energy 0.85 eV makes a transition to a state of ... . Find the energy and wavelength of photon emitted.
Description : What are some cartoons currently on television that a hypothetical, 16 year-old American boy would watch?
Last Answer : have a 17 year old girl that likes King of the Hill
Description : Consider the following statements: 1. When a nerve fibre is stimulated, a profound change is produced in the electrical properties of surface membrane and in steady potential. 2. Upon excitation, the resting potentialis suddenly changed. 3. It is due ... 1, 2, 3 (b) 2, 3 (c) 1, 2, 3, 4 (d) 1, 2, 4
Last Answer : Ans:(d)
Last Answer : A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be about 2 V.
Description : An electron falls through a potential differsence of `1000 V` and gives up `1.6 xx10^(-16) J` of energy. What is the charge on the electron?
Last Answer : An electron falls through a potential differsence of `1000 V` and gives up `1.6 xx10^(-16) J` of energy. What is the charge on the electron?
Description : Taking first period and 17 th group of the periodic table, write gradation of properties with respect to the following: a) atomic size b) Ionisation energy c) electro positivity and electro negativity.
Last Answer : The elements of 1 st period are hydrogen and helium. a) Atomic size of hydrogen is larger then that of helium because atomic size decreases across a period. b) Ionisation energy of helium ... higher as it increases down the group. Electro negativity of fluorine as it decreases down the group.
Description : The element with highest first ionisation energy is (1) hydrogen (2) helium (3) lithium (4) sodium
Last Answer : helium
Description : Which kind of isomerism is shown by the complex `[Co(NH_(3))_(5)(ONO)]SO_(4)` ? 1. Ionisation isomerism 2.Linkage isomerism 3. Geometrical isomerism 4
Last Answer : Which kind of isomerism is shown by the complex `[Co(NH_(3))_(5)(ONO)]SO_(4)` ? 1. Ionisation ... are correct only D. Q, R and S are correct only
Description : Ionisation energy depends upon:
Last Answer : Ionisation energy depends upon: A. Principle qunatum number B. Azimuthal quantum number C. Magnetic quantum number D. (1) & (2) both
Description : The ionisation energy of `H` is `13.6 eV`. Calculate the ionization energy of `Li^(2+)` ions.
Last Answer : The ionisation energy of `H` is `13.6 eV`. Calculate the ionization energy of `Li^(2+)` ions. A. 13.6 eV B. 27.2 eV C. 40 .8 eV D. 122 .4 eV
Description : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have the highest electronegativity and consequently can oxidise
Last Answer : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have ... (D) clathrates with He and Ne are highly expolsive.
Last Answer : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have ... +6HF underset(Delta)overset("475 K")to XeF_6+3H_2O`
Last Answer : The ionisation energy of dioxygen (`O_2`) is very close to that of Xenon. Also F and O have the highest ... Ill), (lV) D. (D) (I), (lV)
Description : The ionisation isomer of `[Cr(H_(2)O)_(4) Cl (NO_(2))]Cl`
Last Answer : The ionisation isomer of `[Cr(H_(2)O)_(4) Cl (NO_(2))]Cl` A. `[Cr(H_(2)O)_(4)(O_(2)N)]Cl_(2)` B. `[Cr( ... D. `[Cr(H_(2)O)_(4)Cl_(2)(NO_(2))].H_(2)O`
Description : The value of ionisation energy for inert gases is ________.
Last Answer : The value of ionisation energy for inert gases is ________. A. Zero B. Low C. High D. Negative
Description : Define ionization enthalpy. Name the factors on which ionisation enthalpy depends? How does it vary down the group and across a period?
Last Answer : Define ionization enthalpy. Name the factors on which ionisation enthalpy depends? How does it vary down the group and across a period?
Description : Rainbow is due to (a) Adsorption of sunlight in minute water droplets (b) Diffusion of sunlight through water droplets (c) Ionisation of water droplets (d) Refraction and reflection of sunlight by water droplets
Description : Which of the following properties is not true for an alkali metal? (a) Low electronegativity (b) Low ionisation energy (c) Low atomic volume (d) Low density
Last Answer : Ans:(c)
Description : Conversion of a substance directly from solid to vapour state is known as (a) Vaporisation (b) Sublimation (c) Decomposition (d) Ionisation
Last Answer : Ans:(b)
Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.
Description : Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has – (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge
Last Answer : (3) stable half filled 2p sub level Explanation: Ionization energy is a measure of the ease in which atoms lose electrons and become positive ions.
Description : Rainbow is due to - (1) absorption of sunlight in minute water droplets (2) diffusion of sunlight through water droplets (3) ionisation of water deposits (4) refraction and reflection of sunlight by water droplets
Last Answer : (4) refraction and reflection of sunlight by water droplets
Description : The element with highest ionisation energy from the elements of period 1, 2, 3 is
Last Answer : period 1.
Description : How does ionisation energy vary across a period and down a group?
Last Answer : Ionisation energy increases along a period and decreases down a group. Ionisation energy decreases with increase in the atomic size. Ionisation energy Increases Across a period (Left to right)
Description : What is meant by ionisation energy?
Last Answer : Ionisation energy is the energy required to remove the electron from the outermost shell from a free and isolated atom of the element.
Description : Among liquids, water has a comparatively high value of thermal conductivity, due to its (A) Low density (B) High viscosity (C) Partial ionisation (D) Dense structure
Last Answer : (C) Partial ionisation
Description : Pick out the wrong statement. (A) The X-rays cannot be deflected by electric field unlike cathode rays (B) The intensity of X-rays can be measured by ionisation current produced due to the ... the anode-cathode voltage (D) Crystal structure of a material can be studied by an electron microscope
Last Answer : (C) The quality of X-rays can be controlled by varying the anode-cathode voltage
Description : The advantage of oil filled cables is (a) more perfect impregnation (b) smaller overall size (c) no ionisation, oxidation and formation of voids (d) all of the above
Last Answer : (d) all of the above
Description : The following attribute of a drug tends to reduce its volume of distribution: A. High lipid solubility B. Low ionisation at physiological pH values C. High plasma protein binding D. High tissue binding
Last Answer : C. High plasma protein binding
Description : Ionisation energy of nitrogen is greater than that of oxygen because nitrogen has (1) high bond dissociation energy (2) smaller atomic radius (3) stable half filled 2p sub level (4) high nuclear charge
Last Answer : stable half filled 2p sub level
Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
Description : Define degree of Ionisation. Explain the factors affecting degree of Ionisation.
Last Answer : Degree of Ionization: - The fraction of the total number of molecules of an electrolyte that ionizes in solution called the degree of ionization. Factors Affecting Degree Ionization ... of Ionisation is directly proportional to temperature. As temperature increases, degree of ionization increases.
Description : If frequency of excitation of a forced vibration system with negligible damping is very close to natural frequency of the system, then the system will A) Execute harmonic motion of large amplitude B) Beat with a very high peak amplitude C) Perform aperiodic motion D) None of the above
Last Answer : A) Execute harmonic motion of large amplitude
Description : When Alternator excitation increases and machine is operating at lagging power factor then a) I increase b) I decreases c) No effect on current d) None
Last Answer : Ans: I increase
Description : The drift speed of electrons in copper wire of diameter and length `l` is `v` . If the potential difference across the wire is doubled, then the new d
Last Answer : The drift speed of electrons in copper wire of diameter and length `l` is `v` . If the potential ... `2upsilon` C. `3upsilon` D. `upsilon//2`
Description : In the circuit diagram shown in figure, potential difference across `3Omega` resistance is 20 V. Then, match the following two columns.
Last Answer : In the circuit diagram shown in figure, potential difference across `3Omega` resistance is 20 V. Then, match the following two columns.
Description : If a secondary coil has 40 turns, and, a primary coil with 20 turns is charged with 50 V of potential difference, then the potential difference in the secondary coil would be A. 50 V in secondary coil B. 25 V in secondary coil C. 60 V in secondary coil D. 100 V in secondary coil
Last Answer : 100 V in secondary coil