State law of conservation of mass

State law of conservation of mass
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During a chemical reaction the total mass of the reactants is equal to the total mass of products.
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The first law of thermodynamics is the law of  (a) conservation of mass  (b) conservation of energy  (c) conservation of momentum  (d) conservation of heat  (e) conservation of temperature.

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Kirchhoff 1st law is is manifestation of a. law of conservation of mass b. law of conservation of charge c. law of conservation of energy d. none

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Last Answer : (C) Conservation of mass

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Which of the following is the best example of law of conservation of mass? [NCERT 1975] (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2. (B) When 12 g of carbon is heated in a vacuum there is no change in mass. (C) A sample of air increases in volume when heated at constant pressure but its mass remains unaltered. (D) The weight of a piece of platinum is the same before and after heating in air.

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Lenz's law is an example of the law of conservation of one of the following. Is it conservation of: w) mass x) charge y) momentum z) energy

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Which of the following scientists first stated the law of conservation of mass? Was it: w) Lavoisier x) Dalton y) Proust z) Boyle

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Purity of a metal can be determined with the help of (1) Pascal’s law (2) Boyle’s law (3) Archimedes principle (4) Conservation of mass principle

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Last Answer : Archimedes principle

Which of the following laws validates the statement that matter can neither be created nor destroyed ? (1) Law of conservation of energy (2) Le Chatelier’s Principle (3) Law of conservation of mass (4) Law of osmosis

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Last Answer : Law of conservation of mass

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A jet engine works on the principle of a.Conservation of energy b.Conservation of mass and momentum c.Conservation of linear mementum d.Conservation of energy and momentum e.Conservation of mass

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A rocket works on the principle of conservation of (a) Mass (b) Energy (c) Linear momentum (d) Angular momentum

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Last Answer : Ans:(c)

As the train starts moving, a man sitting inside leans backwards because of (a) Inertia of rest (b) Inertia of motion (c) Moment of inertia (d) Conservation of mass

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