Oxygen was experimentally prepared by

Oxygen was experimentally prepared by
by

1 Answer

Answer :

Karl Scheele
by

Related questions

Who among the following demonstrated experimentally that simple organic molecules like sugar s and amino acids could be produced from inorganic molecules if early earth atmosphere is created (a) Donald Brown (b) A.I. Oparin (c) Oscar Miller (d) Stanley Miller

Description : Who among the following demonstrated experimentally that simple organic molecules like sugar s and amino acids could be produced from inorganic molecules if early earth atmosphere is created (a) Donald Brown (b) A.I. Oparin (c) Oscar Miller (d) Stanley Miller

Last Answer : Ans:(d)

The theory of spontaneous generation of life was experimentally disproved by: 1. Francesco Redi 2. Lamark 3. Leeuwenhock 4. Louis Pasteur Select the correct answer using the codes given below: (a) Only 1 (b) 2 and 3 (c) 1 and 4 (d) Only 4

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9. One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations. -Physics-10

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Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Description : Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Last Answer : The answer is 'Hertz'

Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Description : Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

Last Answer : answer:

Who firstly demonstrated experimentally the existence of electromagnetic wave? -General Knowledge

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How is electrolytic conductance measured experimentally?

Description : How is electrolytic conductance measured experimentally?

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While determining the refractive index of a liquid experimentally, the microscope was focussed at the bottom of a beaker, when its reading was 3.965 c

Description : While determining the refractive index of a liquid experimentally, the microscope was focussed at the bottom of a beaker, when its reading was 3.965 c

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Explain :  Electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

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Alloxan can experimentally induce diabetes mellitus due to (A) Stimulation of α cells of the islets of langerhans (B) Necrosis of the β cells of the islets (C) Potentiation of insulinase activity (D) Epinephrine like action

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What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor absorbed Correct (4) Answer – (1) energy is always absorbed Explanation: If a bond is broken, energy is released; and if a bond is formed, energy must have been absorbed. As these occur, a change in the chemical energy of the system also occurs. Within each bond of a molecule is an experimentally determined amount of enemy that upon the breaking of that bond is released into the chemical system. The energy within these bonds are 'stored' and can be easily thought of as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

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Who firstly demonstrated experimentally the existence of electromagnetic wave?

Description : Who firstly demonstrated experimentally the existence of electromagnetic wave?

Last Answer : Hertz

Nucleic acids are unique among the biopolymers in that they contain phosphate. How has this property been exploited experimentally in studies

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Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0 ) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)? (A) ε = ε0 + α.t (B) ε = ε0 + α.t 2 (C) ε = ε0 + α.t 3 (D) ε = ε0 + α.t

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Last Answer : (A) ε = ε0 + α.t

The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the (A) Reaction is elementary with a molecularity of 2 (B) Molecularity of the reaction is 2, but the reaction may not be elementary (C) Reaction may be elementary with molecularity of 2 (D) Reaction is elementary but the molecularity may not be 2

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Pick out the wrong statement. (A) 'Hold back' is defined as the fraction of material that stays longer than the mean residence time (B) Study of non-ideal flow reactor is done experimentally by stimulus￾response technique (C) For studying a chemical reaction, it is desirable to monitor the reactants during initial stages and the products during the final stages of reaction (D) A batch reactor cannot be used to study the kinetics of catalytic reaction

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The order of a chemical reaction is (A) An experimentally determined quantity (B) Always equal to the total stoichiometric number of reactants (C) Never fractional (D) None of these

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All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally

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The order of a chemical reaction (A) Can be determined only experimentally (B) Can be determined from the stoichiometry of the reaction (C) Cannot be zero (D) Can be fractional

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de Broglie’s relation for matter waves was experimentally verified by: a) Davisson b) Germer c) G.P. Thomson d) All the these

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Coacervates were experimentally produced by a) Oparin and Haldane b) Darwin c) Aristotle d) Louis Pasture

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Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have to measure the cell potential to obtain the difference in potential energy because the potential of half-reactions cannot be measured directly. C The direction of a redox reaction can only be determined experimentally. D Half-cell potentials for half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

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Dirac theoretically predicted the existence of the positron. Who experimentally identified positrons in 1932 in cloud chamber pictures of cosmic ray particle tracks?

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The wave nature of electrons was EXPERIMENTALLY verified by: w) Einstein x) Davisson and Germer y) Balmer z) Bohr.

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The value of G, the universal gravitational constant, was measured experimentally by: w) Newton x) Cavendish y) Copernicus z) Kepler

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1. Sex determination of child is done by whose chromosome? 2. Who is authorised to decide over a dispute regarding disqualification of a member of Parliament? 3. Who firstly demonstrated experimentally the existence of electromagnetic wave? 4. Which is not essentially a species of the Himalayan vegetation? 5. What are the main channels of our knowledge about the Indus Valley Civilization?

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Oxygen gas can be prepared from solid `KMnO_4` by

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Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

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Priestley called the gas he prepared "perfect air", b it was later named "oxygen" by whom?

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Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Description : Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne

Last Answer : Chlorine over slaked lime