Description : he dipole magnetic moment (μ) is directly proportional to nuclear spin (I), connected by a constant called the A. Gyromagnetic ratio (γ) B. Planck's constant (h) C. Nuclear susceptibility (χ) D. Chemical shift (δ)
Last Answer : Gyromagnetic ratio (γ)
Description : Which one of the following is necessary for mass spectrometry to occur? A. Loss of an electron B. Change of alignment of a proton in a magnetic field C. A molecular vibration D. Excitation of an electron from the ground state to a higher energy state
Last Answer : Loss of an electron
Description : Signal splitting in NMR arises from? A. Shielding effect B. Spin-spin decoupling C. Spin-spin coupling D. Deshielding effecr
Last Answer : Spin-spin coupling
Description : What is shielding in NMR? A. Using a curved piece of metal to block an opponent’s attack B. Putting metal around an Rf source C. When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei D. Blocking parts of a molecule from Rf radiation
Last Answer : When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei
Description : The basis of the technique of chromatography for separating components of a mixture is? A. the differing movement of particles of different mass in an electrical field B. the interaction of the ... infrared radiation by the components. D. the deflection of charged particles in a magnetic field.
Last Answer : the interaction of the components with a stationary and a mobile phases
Description : The base peak in mass spectrum is? A. The lowest mass peak B. The peak corresponding to the parent ion C. The highest mass peak D. The peak set to 100% relative intensity
Last Answer : The peak set to 100% relative intensity
Description : Chemical shifts (δ) are typically reported in units of A. Gauss (G) B. Millitesla per meter (mT/m) C. Parts per million (ppm) D. Percent (%)
Last Answer : Parts per million (ppm)
Description : In mass spectrometry, fragmentation of ions is achieved through? A. Ionization B. Splitting C. Solubilization D. Coupling
Last Answer : Ionization
Description : Which of the following techniques would be most useful to identify and quantify the presence of a known impurity in a drug substance? A. NMR B. MS C. IR D. HPLC
Last Answer : IR
Description : HPLC is an abbreviation for? A. High Profit Liquid Chromatography B. High Pressure Liquid Chromatography C. Higher Performance Low Chromatography D. Higher Profit Low Chromatography
Last Answer : High Pressure Liquid Chromatography
Description : In a chromatographic separation, which of the following is most appropriate for the qualitative identification of a substance? A. Relative retention factor B. Retention factor C. Retention time D. Resolution
Last Answer : Retention time
Description : Column efficiency is measured in terms of number of theoretical plates, which is: A. Inversely related to height equivalent to theoretical plates B. Directly related to the peak width C. Directly related to height equivalent to theoretical plates D. Inversely related to the peak width
Last Answer : Inversely related to height equivalent to theoretical plates
Description : 1H nuclei located near electronegative atoms tend to be ______ relative to 1H nuclei A. Shielded B. Deshielded C. Resonanced D. Split
Last Answer : Deshielded
Description : Which of the following is used as a carrier gas in gas chromatography A. Carbon dioxide B. Oxygen C. Helium D. Methane
Last Answer : Helium
Description : Which of the following is an example of bulk property or general detector in HPLC A. Fluorescence detector B. Refractive index detector C. Electrochemical detector D. UV-Visible detector
Last Answer : Refractive index detector
Description : What is a chromophore? A. A coloured compound B. A group of atoms in compound responsible for electromagnetic radiation C. A group of atoms in a compound responsible for the absorption of electromagnetic radiation D. A group of atoms in coloured compound
Last Answer : A group of atoms in a compound responsible for the absorption of electromagnetic radiation
Description : Infrared spectroscopy provides valuable information about A. Molecular weight B. Melting point C. Conjugation D. Functional groups
Last Answer : Functional groups
Description : To improve a chromatographic separation, you must A. Increase the number of theoretical plates on the column. B. Increase the height of the theoretical plates on the column. C. Increase both the number ... the column. D. Decrease both the number and the height of the theoretical plates on the column
Last Answer : Increase the number of theoretical plates on the column
Description : The fluid exiting a chromatographic column is called the A. eluent B. eluate C. analyte D. elution
Last Answer : eluate
Description : Mobile phase can be A. gas or liquid B. solid or liquid C. only solid D. gas only
Last Answer : gas or liquid
Description : Chromatography can be used to A. form mixtures B. change mixture compositions C. separate mixtures into pure substances D. all of these
Last Answer : separate mixtures into pure substances
Description : The electrons in an atom which rotate about the nucleus possess what kind of energy? A. Translational energy B. Spin energy C. Rotational kinetic energy D. Sensible energy
Last Answer : Rotational kinetic energy
Description : What refers to the portion of the internal energy of a system associated with the kinetic energies of the molecules? A. Translational energy B. Spin energy C. Rotational kinetic energy D. Sensible energy
Last Answer : Sensible energy
Description : A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ratio of their radii is
Last Answer : A proton and helium nucleus are shot into a magnetic field at right angles to the field with same kinetic energy. Then the ... `1:2` C. `2:1` D. `1:4`
Description : ABC is a triangle right angled at C. A line through the mid-point M of hypotenuse AB and parallel to BC intersects AC at D. Show that (i) D is the mid-point of AC (ii) MD ⊥ AC (iii) CM = MA = ½ AB -Maths 9th
Last Answer : Solution: (i) In ΔACB, M is the midpoint of AB and MD || BC , D is the midpoint of AC (Converse of mid point theorem) (ii) ∠ACB = ∠ADM (Corresponding angles) also, ∠ACB = 90° , ∠ADM = 90° and MD ⊥ AC (iii ... SAS congruency] AM = CM [CPCT] also, AM = ½ AB (M is midpoint of AB) Hence, CM = MA = ½ AB
Description : The orbital angular momemtum quantum number indicates which one of the following? w) the average distance of the electrons from the nucleus x) the direction of spin of the electron y) the shape of the orbital z) the position about the three axes in space of the orbital
Last Answer : ANSWER: Y -- THE SHAPE OF THE ORBITAL
Description : Crystal field stabilization energy for high spin `d^4` octahedral complex is
Last Answer : Crystal field stabilization energy for high spin `d^4` octahedral complex is A. `-0.6 Delta_(0)` B. `-1. ... `-1.6Delta_(0)+P` D. `-1.2Delta_(0)`
Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus
Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE
Description : A vanadium electrically, if the magnetic moment (spin only) of the vanadium product is 1.73 B.M. and the mass of electrode decreases by 102 mg during
Last Answer : A vanadium electrically, if the magnetic moment (spin only) of the vanadium product is 1.73 B.M. and ... current efficiency 100%, At. wt. of V = 51)
Description : The spin-only magnetic moment of `[Fe(NH_(3))_(6)]^(3+) and [FeF_(6)]^(3-)` (in units of BM ) respectively are
Last Answer : The spin-only magnetic moment of `[Fe(NH_(3))_(6)]^(3+) and [FeF_(6)]^(3-)` (in units of BM ) respectively ... 1.73 C. 1.73 and 5.92 D. 5.92 and 5.92
Description : The correct order of spin-only magnetic moments among the following is : (Atomic number : Mn=25,Co=27,Ni=28,Zn=30)
Last Answer : The correct order of spin-only magnetic moments among the following is : (Atomic number : Mn=25,Co=27,Ni=28,Zn=30) ... (4)]^(2-) gt [ZnCl_(4)]^(2-)`
Description : The magnetic moment (spin only) of `[NiCl_4]^(2-)` is
Last Answer : The magnetic moment (spin only) of `[NiCl_4]^(2-)` is A. 1.82 BM B. 5.46BM C. 2.82 BM D. 1.41 BM
Description : The spin-only magnetic moment [in units of Bohr magneton, `(mu_(B)` of `Ni^(2+))` in aqueous solution would be (atomic number of `Ni=28)`
Last Answer : The spin-only magnetic moment [in units of Bohr magneton, `(mu_(B)` of `Ni^(2+))` in aqueous solution would be ( ... ` A. 2.84 B. 4.8 C. 0 D. 1.73
Description : The correct order of magnetic moments (spin values in B.M.) among is:
Last Answer : The correct order of magnetic moments (spin values in B.M.) among is: A. `Fe(CN)_(6)^(4-) gt [Co(Cl_(4)]^(2 ... [CoCl_(4)]^(2-) gt [Fe(CN)_(6)]^(4-)`
Description : The complex showing a spin -magnetic momnet of `2.82 BM` is .
Last Answer : The complex showing a spin -magnetic momnet of `2.82 BM` is . A. `Ni(CO)_(4)` B. `[NiCl_(4)]^(2-)` C. `Ni(PPh_(3))_(4)` D. `[Ni(CN)_(4)]^(2-)`
Description : The spin only magnetic moment value ( in Bohr magneton units ) of `Cr(CO)_(6)` is :
Last Answer : The spin only magnetic moment value ( in Bohr magneton units ) of `Cr(CO)_(6)` is :
Description : The spin magnetic moment of cobalt in the compound , `Hg[Co(SCN)_(4)]` is :
Last Answer : The spin magnetic moment of cobalt in the compound , `Hg[Co(SCN)_(4)]` is : A. `sqrt(3)` B. `sqrt(8)` C. `sqrt(12)` D. `sqrt(24)`
Description : The orientation of an atomic orbital is governed by – (1) principal quantum number (2) magnetic quantum number (3) spin quantum number (4) azimuthal quantum number
Last Answer : (2) magnetic quantum number Explanation: Quantum numbers may be defined as a set of four numbers which give complete information about the electron in an atom, i.e., energy, orbital occupied, size ... tells the number of orientations which the orbitals present within the same sub-shell can take up.
Description : Two electrons in an orbital are differentiated by which of the following? (1) Magnetic quantum number (2) Spin quantum number (3) Principal quantum number (4) Azimuthal quantum number
Last Answer : (2) Spin quantum number Explanation: Spin quantum number is the is the fourth quantum number that differentiates two electrons in the same orbital. The Pauli exclusion principle states that "no two ... atom. Each electron must have a different spin or occupy a different shell from any other.
Last Answer : (2) Spin quantum number Explanation: Spin quantum number is the fourth quantum number that differentiates two electrons in the same orbital.
Description : How many maximum 3s electrons can have magnetic spin quantum number -1/2?
Last Answer : Ans. 1 electrons.
Description : Two electrons in an orbital are differentiated by which of the following ? (1) Magnetic quantum number (2) Spin quantum number (3) Principal quantum number (4) Azimuthal quantum number
Last Answer : Spin quantum number
Description : The orientation of an atomic orbital is governed by (1) principal quantum number (2) magnetic quantum number (3) spin quantum number (4) azimuthal quantum number
Last Answer : magnetic quantum number
Description : The capacitance of a material refers to a) Ability of the material to store magnetic field b) Ability of the material to store electromagnetic field c) Ability of the material to store electric field d) Potential between two charged plates
Last Answer : c) Ability of the material to store electric field
Description : Strain energy of a member may be equated to (A) Average resistance × displacement (B) ½ stress × strain × area of its cross-section (C) ½ stress × strain × volume of the member (D) ½ (stress)2 × volume of the member + Young's modulus E
Last Answer : (D) ½ (stress)2 × volume of the member + Young's modulus E
Description : Mumbai High refers to the (a) Greater Mumbai area (b) Highest place in Mumbai (c) Slopes of Western Ghats (d) Oil field below seabed off Mumbai island
Last Answer : Ans: (d)
Description : To recover from a spin, the elevators should be: a. Moved up to increase the angle of attack b. Moved down to reduce the angle of attack c. Set to neutral d. Allowed to float
Last Answer : b. Moved down to reduce the angle of attack
Description : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel to the magnetic lines of force. Then the coil willa) rotate to maximize the magnetic flux through ... since the magnetic flux through its plane is zero.d) experience the constant torque equal to NBIA
Last Answer : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel ... d) experience the constant torque equal to NBIA
Description : Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same direction then the magnetic field m
Last Answer : Two parallel long wires carry currents `i_(1) "and" i_(2)` with `i_(1) gt i_(2)`.When the currents are in the same ... 4` B. `5:3` C. `7:11` D. `11:7`
Description : If the velocity of charged particle has both perpendicular and parallel components while moving through a magnetic field ,then what is the path follow
Last Answer : If the velocity of charged particle has both perpendicular and parallel components while moving through a ... B. Ellipatical C. Linear D. Helical