Description : It is possible to distinguish between optical isomers (a) by using chemical tests (b) by mass spectrometry (c) by IR spectroscopy (d) by polarimetry
Last Answer : (d) by polarimetry
Description : Which of the following may be used to measure the rate of nuclear disintegration? (A) Geiger-Muller Counter (B) Cyclotron (C) Cold chamber (D) Mass spectrograph
Last Answer : (A) Geiger-Muller Counter
Description : In mass spectrometry, fragmentation of ions is achieved through? A. Ionization B. Splitting C. Solubilization D. Coupling
Last Answer : Ionization
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 : In the mass spectrograph, two positively charged ions having the same velocity pass through a slit and enter a uniform magnetic field at right angles to their initial velocities. The ions will NOT be ... charges and their masses are equal z) the ratios of their charges to their masses are equal
Last Answer : ANSWER: Z -- THE RATIOS OF THEIR CHARGES TO THEIR MASSES ARE EQUAL
Description : The mass spectrograph directly yields a value for which one of the following? w) mass of a photon x) mass of a neutron y) masses of isotopes of elements z) mass to charge ratio of ions
Last Answer : ANSWER: Z -- MASS TO CHARGE RATIO OF IONS
Description : When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes are
Last Answer : When the sample of copper with the zinc impurity is to be purified by electrolysis, the appropriate electrodes ... "),("Pure Zinc","ImPure Zinc"):}`
Description : When the sample of Cu with Zn as impurity is to be purified by electrolysis, the appropriate electrodes are :
Last Answer : When the sample of Cu with Zn as impurity is to be purified by electrolysis, the appropriate electrodes are ... 4)","Impure zinc","Impure sample"):}`
Description : (2) amount of oxygen used for biochemical oxidation Explanation: Biochemical oxygen demand or B.O.D. is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to ... quantitative test, although it is widely used as an indication of the organic quality of water.
Last Answer : The addition of gypsum to port-land cement helps in : (1) increasing the strength of cement (2) rapid setting of cement (3) preventing rapid setting of cement (4) reduction in the cost of cement
Description : (4) Decomposition of manganese dioxide Explanation: One of the two chemical methods starts from natural manganese dioxide and converts it using dinitrogen tetroxide and water to manganese nitrate ... 400°C, the salt decomposes, releasing N2O4 and leaving a residue of purified manganese dioxide.
Last Answer : The mass number of a nucleus is - (1) always less than its atomic number (2) the sum of the number of protons and neutrons present in the nucleus (3) always more than the atomic weight (4) a fraction
Description : Main constituents of purified Lurgi gas are (A) H2 , CmHn & CO2 (B) CO, H2 & CH4 (C) CO2 , O2 & CO (D) N2 , H2 & CO2
Last Answer : (B) CO, H2 & CH4
Description : Identify the components labelled A, B, C and D in the diagram below from the list (i) to (vii) given along with Components : (i) Cristae of mitochondr
Last Answer : Identify the components labelled A, B, C and D in the diagram below from the list (i) to (vii) given along with ... v)","(iv)","(viii)","(iii)"):}`
Description : Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with Components : (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic ... viii) (vi) (c) (vi) (v) (iv) (vii) (d) (v) (i) (iii) (ii)
Last Answer : (a) (v) (iv) (viii) (iii)
Description : Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) (A) m/ρ . Vp (B) m . ρ/Vp (C) m . Vp /ρ (D) Vp /m . ρ
Last Answer : (A) m/ρ . Vp
Description : What are the main chemical components of paper ?
Last Answer : The main chemical component of paper is cellulose.
Description : Can you help Identify the origin of the audio sample in this song?
Last Answer : answer:Just googling “Bette Davis” (since it’s her voice as the female in the clip) and “I’ll show you how uncivilized I can be” (as the last spoken part of the clip) returns Payment on Demand, the place where I’d start.
Description : What can be the first step done to identify the organisms present in a sample of stool collected from a patient who is suffering from severe diarrhea?
Last Answer : What is the answer ?
Description : Given below is an incomplete table about certain hormones , their source glands and one major effect of each on the body in humans . Identify the corr
Last Answer : Given below is an incomplete table about certain hormones , their source glands and one major effect of ... Placenta" , "Glucagon" , "Calcitonin"):}`
Description : Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D, and select the right option
Last Answer : Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled ... Collagen "),(" phage fibres"):}`
Description : Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D and select the right option about them. A B C D A B C ... fibres (c) Macrophage Collagen Fibroblast Mast cell fibres (d) Mast cell Collagen Fibroblast Macro- fibres phage
Last Answer : (a) Macrophage Fibroblast Collagen Mast fibres cel
Description : The porosity of a certain soil sample was found to be 80% and its specific gravity was 2:7; the critical hydraulic gradient will be estimated as (a) 0.34 (b) 0.92 (c) 1.0 (d) 1.5
Last Answer : (a) 0.34
Description : Which one is a set of elements taken from a larger population according to certain rules? a. Sample b. Population c. Statistic d. Element
Last Answer : a. Sample
Description : In a chemical interaction 10 g of hydrogen chloride is added to 20 g of zinc to form 24 g of zinc chloride and a certain amount of hydrogen gas. What mass of hydrogen gas is expected to be formed 6?
Last Answer : The maximum yield of H2 from this reaction under the conditions given is 0.3 g.This is a limiting reagent (reactant) question. The yield of hydrogen gas (H2) is determined for both the hydrogen chloride ... figureThe limiting reagent is HCl, which means that the maximum yield of H2 is 0.3 mol H2.
Description : Which of the following cannot be purified by sublimation? (a) Iodine (b) Camphor (c) Citric acid (d) Naphthalene
Last Answer : Ans:(c)
Description : Which of the following can be purified by the electrolytic method? (a) Sodium (Na) (b) Copper (Cu) (c) Boron (B) (d) Chlorine (C12)
Last Answer : Ans:129
Description : Camphor can easily be purified by the process of (a) Sublimation (b) Distillation (c) Crystallisation (d) Sedimentation
Last Answer : Ans:(a)
Description : Colloids are purified by (a) Peptisation (b) Coagulation (c) Condensation (d) Dialysis
Last Answer : Ans:(d)
Description : How can petroleum be purified?
Last Answer : Fractional distillation
Description : The element which is purified by melt- ing?
Last Answer : Lead
Description : Which are the two lower chambers of the heart from which purified blood flows out?
Last Answer : Ventricles
Description : The haemodialyzer has semi-permeable lining of tubes which help to: (a) To maintain osmotic pressure of blood. (b) To filter nitrogenous wastes from the dialyzing solution. (c) In passing the waste product, in the dialyzing solution. (d) To pump purified blood back into the body of the patient.
Last Answer : (c) In passing the waste product, in the dialyzing solution.
Description : How can water be purified in the laboratory?
Last Answer : In the laboratory, water can be purified by a process called distillation.
Description : What is the role of purified linseed oil in oil painting?
Last Answer : It makes the paint flow better. It’s the equivalent of using water with watercolors or acrylics.
Description : How schools in Nazi Germany were 'cleansed' and 'purified'? -History 9th
Last Answer : 1.Jew teachers were removed. 2. Students were separated on the basis of race. 3. Undesirable kids were later removed from the school and killed. 4. School books were re-written. 5. Students were taught to ... join . The 10 year old had to join ‘Jungvolk' and 14 year old ‘Hitler Youth'.
Description : In which plant phytochrome is isolated and purified? -Biology
Last Answer : answer:
Description : Which purified oil does Aviation fuel for jet aeroplanes consist? -General Knowledge
Last Answer : The answer is 'Kerosene'
Description : Sewage water is purified by
Last Answer : Sewage water is purified by A. Microorganisms B. light C. Fishes D. Aquatic plants.
Description : A colloidal solution can be purified by the following method :
Last Answer : A colloidal solution can be purified by the following method : A. dialysis B. peptization C. filtration D. oxidation
Description : Sewage water can be purified for recycling with action of :
Last Answer : Sewage water can be purified for recycling with action of : A. Aquatic plant B. Micro organism C. Penicillin D. Fishes
Description : Sewage water is purified for recycling by the action of
Last Answer : Sewage water is purified for recycling by the action of A. Light B. Microorganisms C. Aquatic plants D. Fishes
Description : Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….
Last Answer : Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….
Description : Statement-I : Lead, tin and bismuth are purified by liquation method. Statement-II : Lead, tin and bismuth have low m.p as compared to impurities.
Last Answer : Statement-I : Lead, tin and bismuth are purified by liquation method. Statement-II : Lead, tin and bismuth have low m.p as compared to impurities.
Description : In which of the following the impure metal not purified by the oxidation of impurites
Last Answer : In which of the following the impure metal not purified by the oxidation of impurites A. silver ... iron and cadmium D. bessemerisation of pig iron
Description : `Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a high temperature.
Last Answer : `Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a ... D. Statement-1 is false but Statement -2 is true
Description : Cassiterite ore `(SnO_(2))` is purified by
Last Answer : Cassiterite ore `(SnO_(2))` is purified by A. Magnetic separator B. roasting C. leaching D. Calcination
Description : Silver containing lead as an impurity is not purified by
Last Answer : Silver containing lead as an impurity is not purified by A. Poling B. Distillation C. cupellation D. Levigation
Description : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.
Last Answer : Assertion : Nickel can be purified by Mond process. Reason : `Ni(CO)_(4)` is a volatile compound which deomposed at `460K` to give pure `Ni`.
Description : In the extraction of aluminium by Hall-Heroult process purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to
Last Answer : In the extraction of aluminium by Hall-Heroult process purified `Al_(2)O_(3)` is mixed with `CaF_(2)` to A ... ^(3+)` into Al(s)` D. acts as catalyst