हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

State the ‘Law of Conservation of Mass’.

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प्रश्न

State the ‘law of conservation of mass’.

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उत्तर

Law of Conservation of Mass: “In any chemical reaction, the total mass of the reacting substances is equal to the total mass of the products of the reaction provided masses are measured under similar conditions.”

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अध्याय 1: Matter - Exercises

संबंधित प्रश्न

In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass.

Sodium carbonate + acetic acid → sodium acetate + carbon dioxide + water


Hydrogen and oxygen combine in the ratio of 1:8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?


Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?


When magnesium is burnt in air, there is an increase in mass after the reaction.


If an object weighs 6 kg on earth. What will be its weight on moon ?


State the law of conservation of mass.


Name the law of chemical combination which was given by Proust.


‘If 100 grams of calcium carbonate (whether in the form of marble or chalk) are decomposed completely, then 56 grams of calcium oxide and 44 grams of carbon dioxide are obtained’. Which law of chemical combination is illustrated by this statement ?


State the law of conservation of mass. Give one example to illustrate this law.


Which postulate of Dalton's atomic theory can explain the law of conservation of mass ?


The law of conservation of mass was given by :


State the main points of Landolt’s experiment for experimental evidence of the law. 


Select the correct answer from A, B, C, D & E for the statement given below:

In Landolt’s experiment – the form in which the chemical energy stored up in the reactants __________ is released.


Complete the statement by filling the blank with the correct word given below.

The law of conservation of mass is strictly valid if mass and _________ are considered together.


Match the following.

Law of conservation of mass Sir William Crookes
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Cathode rays Joseph Proust
Anode rays Lavoisier
Neutrons Goldstein

The chemical symbol for nitrogen gas is ______.


Name the four laws of chemical combinations.


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