Description : Which of the following scientists first stated the law of conservation of mass? Was it: w) Lavoisier x) Dalton y) Proust z) Boyle
Last Answer : ANSWER: W -- LAVOISIER
Description : "Under the same conditions of temperature and pressure, the volumes of reacting gases and of their gaseous products are expressed in ratios of small whole numbers." This law is attributed to: w) Dalton x) Gay-Lussac y) Ramsay z) Avogadro
Last Answer : ANSWER: X -- GAY-LUSSAC
Description : A sample of pure carbon dioxide, irrespective of its source contains 27.27% carbon and 72.73% oxygen. The data supports [AIIMS 1992] (A) Law of constant composition (B) Law of conservation of mass (C) Law of reciprocal proportions (D) Law of multiple proportions
Last Answer : (A) Law of constant composition
Description : The father of modern chemistry is – (1) Priestley (2) Lavoisier (3) Dalton (4) Mendeleeff
Last Answer : (2) Lavoisier Explanation: Antoine Lavoisier was a French nobleman and chemist central to the 18thcentury chemical revolution and a large influence on both the history of chemistry and the history of biology.
Description : The constant temperature, the product of pressure and volume of a given amount of a gas is constant . This is ______. (1) Gay-Lussac law (2) Charles’s law (3) Boyle’s law (4) Pressure law
Last Answer : (3) Boyle’s law Explanation: Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa when temperature is held constant.
Description : Considering one mole of any gas, the equation of state of ideal gases is simply the ______ law. A. Gay-Lussac law B. Dulong and Petit C. Avogadro’s D. Henry’s
Last Answer : Avogadro’s
Description : “At constant pressure, the volume of a gas is inversely proportional to the pressure”. This is known as ______. A. Boyle’s Law B. Charles’s Law C. Gay-Lussac Law D. Ideal gas law
Last Answer : Boyle’s Law
Description : The hyperbolic process is governed by A. Boyle’s law B. Charles’ law C. Gay-Lussac law D. Avogadro’s law
Last Answer : Answer: A
Description : According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant. A. directly B. indirectly
Description : The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by A. Boyle’s law B. Charles’ law C. Gay-Lussac law D. all of these
Last Answer : Answer: D
Description : An isothermal process is governed by A. Boyle’s law B. Charles’ law C. Gay-Lussac law D. Avogadro’s law
Description : According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant. A. True B. False
Description : According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant (a) Joule’s law (b) Boyle’s law (c) Regnault’s law (d) Gay-Lussac law (e) Charles’ law.
Last Answer : Answer : e
Description : According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as (a) temperature (b) absolute (c) absolute temperature, if volume is kept constant ... , if temperature is kept constant (e) remains constant,if volume and temperature are kept constant.
Last Answer : Answer : c
Description : Which of the following laws is applicable for the behavior of a perfect gas (a) Boyle’s law (b) Charles’law (c) Gay-Lussac law (d) all of the above (e) Joule’s law.
Last Answer : Answer : d
Description : Chemical equation is balanced according to the law of [AMU 1984] (A) Multiple proportion (B) Reciprocal proportion (C) Conservation of mass (D) Definite proportions
Last Answer : (C) Conservation of mass
Description : Which of the following pairs of substances illustrate the law of multiple proportions? [CPMT 1972, 78] (A) CO and CO2 (B) H2O and D2O (C) NaCl and NaBr (D) MgO and Mg(OH)2
Last Answer : (A) CO and CO2
Description : The law of multiple proportions is illustrated by the two compounds [NCERT 1972] (A) Sodium chloride and sodium bromide (B) Ordinary water and heavy water (C) Caustic soda and caustic potash (D) Sulphur dioxide and sulphur trioxide
Last Answer : (D) Sulphur dioxide and sulphur trioxide
Description : Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. ... (B) Law of constant proportions (C) Law of multiple proportions (D) Law of equivalent proportions
Last Answer : (C) Law of multiple proportions
Description : “Plum Pudding Model” for an atom was proposed by (a) Antoine Lavoisier (b) Robert Boyle (c) Ernest Rutherford (d) J. J. Thomson
Last Answer : Ans:(d)
Description : Sourya committee had proposed the establishment of sourya institutes of Technology (SITs) in line with Indian Institutes of Technology (IITs) to cater to the technological and industrial needs of a developing country Which of the ... (iv) only (C) (ii) and (iv) only (D) (ii) and (iii) only
Last Answer : Correct option is (C). Option (i) and (iii) state phrases like ‘in the initial years’ and ‘SIT like institutions can only be established in consultation with IIT’ cannot be logically inferred so (ii) and (iv) are the best inferences i.e. option (C)
Description : Who proposed first atomic theory? (1) E.Rutherford (2) De Broglie (3) John Dalton (4) D.I.Mendeleef
Last Answer : (3) John Dalton Explanation: Democritus first suggested the existence of the atom but it took almost two millennia before the atom was placed on a solid foothold as a fundamental chemical object by John Dalton (1766-1844).
Description : Who proposed first atomic theory? (1) E. Rutherford (2) De Broglie (3) John Dalton (4) D. I. Mendeleev
Description : First Atomic theory was proposed by? A. John Dalton (Answer) B. E.Rutherford C. De Broglie D. D.I.Mendeleef
Last Answer : A. John Dalton (Answer)
Description : Modern periodic law had been given by (1) Moseley (2) Mendeleev (3) Lother-Mayer (4) Lavoisier
Last Answer : (1) Moseley Explanation: In 1913, H.G.J Moseley in England proved that the more fundamental properties of an element are its atomic number. Therefore he suggested that the basis of classification of elements should be atomic number.
Description : Different proportions of oxygen in the various oxides of nitrogen proves the [MP PMT 1985] (A) Equivalent proportion (B) Multiple proportion (C) Constant proportion (D) Conservation of matter
Last Answer : (B) Multiple proportion
Description : Which of the following chemists was the first to use letters as symbols for elements? w) Ernest Oliver Lawrence x) Louis Andrew Proust y) Jons Jacob Berzelius z) none of these
Last Answer : ANSWER: Y -- JONS JACOB BERZELIUS
Description : "If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them". This is __________ law. (A) Hess's (B) Kirchoff's (C) Lavoisier and Laplace (D) None of these
Last Answer : (A) Hess's
Description : The man credited with the law relating the temperature and volume of a gas is: w) Thomson x) Boyle y) Charles z) Dalton
Last Answer : ANSWER: Y -- CHARLES
Description : The law of definite proportions is not applicable to nitrogen oxide because [EAMCET 1981] (A) Nitrogen’s atomic weight is not constant (B) Nitrogen’s molecular weight is variable (C) Nitrogen’s equivalent weight is variable (D) Oxygen’s atomic weight is variable
Last Answer : (C) Nitrogen’s equivalent weight is variable
Description : Is Marcel Proust the twentieth century's answer to Henry James?
Last Answer : Sorry – have only read some of James a while ago and none of Proust although he’s on my bucket list. You’ll have to wait for my response but I’m also thinking they sounds a bit like George Eliot too who does a lot of internal description.
Description : What's up with the "Proust questionaire" in every issue of Vanity Fair?
Last Answer : answer:From George Loper: “The young Marcel was asked to fill out questionnaires at two social events: one when he was 13, another when he was 20. Proust did not invent this party game; he is simply the most extraordinary person to respond to them.”
Description : Lavoisier did not share any basic substances ?
Last Answer : Lavoisier did not share copper.
Description : Who is regarded as father of modern chemistry? (1) Ruterford (2) Einstein (3) Lavoisier (4) C.V. Raman
Last Answer : (3) Lavoisier Explanation: Antoine Lavoisier is considered the father of modern chemistry. He was a French nobleman who recognized and named oxygen and isolated the major components of air.
Description : Who among the following discovered electron? (1) J.J Thomson (2) Max Born (3) Antoine Lavoisier (4) Mendeleef
Last Answer : (1) J.J Thomson Explanation: Electron was discovered by J. J. Thomson in 1897 when he was studying the properties of cathode ray.
Description : The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO4.7H2O. The atomic weight of M is [IIT 1991] (A) 40.3 (B) 36.3 (C) 24.3 (D) 11.3
Last Answer : (C) 24.3
Description : A molar solution is one that contains one mole of a solute in [IIT 1986] (A) 1000 g of the solvent (B) One litre of the solvent (C) One litre of the solution (D) 22.4 litres of the solution
Last Answer : (C) One litre of the solution
Description : Name the person who developed a table of elements which revealed regularities in elemental properties in 1869? w) Theodore Richards x) Antoine Lavoisier y) Dmitri Mendeleev z) Svante Arrhenius
Last Answer : ANSWER: Y -- DMITRI MENDELEEV
Description : What is Law of conservation of mass and Law of constant proportions? -Chemistry 9th
Last Answer : What is the Law of conservation of mass? Laws of conservation of mass - It states that mass can neither created nor destroyed. The total mass before and after a chemical reaction remains constant. ... that in a chemical substance the elements are always present in a fixed proportion by their mass.
Description : By whom was the law of constant proportions enunciated? -Do You Know?
Last Answer : answer:
Description : By whom was the law of constant proportions enunciated?
Last Answer : Proust
Description : 1. Who was the author of the famous work All Contributions to the Critic of Political Economy' ? 2. Nobel Prize winning scientist James D. Watson is known for his work in which area? 3. ... -around an axis pointing towards which side? 20. Which Sultan built the fifth storeys of Qutub Minar?
Last Answer : Answer : 1. Karl Marx 2. Genetics3. Proust 4. Tamil Nadu 5. Atharvaveda 6. Carbon monoxide 7. Lok Sabha 8. Creditors 9. Sindri 10. Nandas 11. Compiler 12. 819°C 13. DNA 14. July 4th 15. Amil 16. Judge of Supreme Court 17. Rome 18. Recession plus inflation 19. The pole star 20. Firoz Shah Tughlaq
Description : what does a tomato worm look like? i have a caterpillar in my garden and want to know if iit is a tomato worm?
Last Answer : a tomato horn worm has a horn on it's head and it will try to bite you.......we use plastic gloves and warm water in a plastic bucket with any kind of liquid soap....maybe 3 teasp of it in a bucket of water ... ........bugs & worms do not like dead grass..............good luck with your garden....
Description : What is the full form of 'IIT' ? -How To ?
Last Answer : The full form of 'IIT' is Indian Institute of Technology
Description : What is the number of elements in a periodic table made by Lavoisier ?
Last Answer : Elements 33 in the periodic table created by Lavoisier .
Last Answer : IIT - Indian Institute of Technology
Description : Among the following statement the incorrect onr is (IIT -1997)
Last Answer : Among the following statement the incorrect onr is (IIT -1997) A. Calamine and siderite are carbonate ... D. Malachite and azurite are ores of copper
Description : How to study kinematics for IIT JEE?
Last Answer : Answers is the place to go to get the answers you need and to ask the questions you want
Description : What are some of the best calculus books for IIT-JEE?
Description : How did you prepare for the IIT-JEE?