Question
Which of the following statements are true?
- Mass can neither be created nor destroyed.
- Rate of reaction is directly proportional to the rate of the products.
- Elements are present in constant proportions.
- Mass of the reactant is not equal to the mass of the products.
Hint:
A specific law explains the functioning of all chemical reactions.
The correct answer is: Mass can neither be created nor destroyed.
- The correct statement is "mass can neither be created nor destroyed"
- According to the law of conservation of mass, it is believed that mass can never be created and never be destroyed. The law explains the functioning of all chemical reactions.
- Every chemical reaction occurring in this universe is somehow balanced. It cannot create matter or mass from anywhere other than what is already present. Thus, if we balance the chemical reaction, we see that mass of reactant produced is equal to the mass of products formed.
Other statements mentioned here are false. The only correct statement is the one of the law of conservation of mass.
Related Questions to study
Which of the following laws are used for balancing the chemical reaction:
The law of conservation of mass is an important property that shows the balancing of chemical reactions.
Which of the following laws are used for balancing the chemical reaction:
The law of conservation of mass is an important property that shows the balancing of chemical reactions.
Who among the following are Greek philosophers?
Aristotle was the philosopher who did not have faith in atomic theory of Dalton.
Who among the following are Greek philosophers?
Aristotle was the philosopher who did not have faith in atomic theory of Dalton.
Who proposed that matter was composed of four ‘elements’—earth, air, wind, and fire—in varying quantities.
The different elements, fire, water, earth, and air are present in this environment but in different ratios and compositions.
Who proposed that matter was composed of four ‘elements’—earth, air, wind, and fire—in varying quantities.
The different elements, fire, water, earth, and air are present in this environment but in different ratios and compositions.
How many numbers of protons and electrons are there in a magnesium ion?
The number of protons is equal to the number of electrons until it becomes an ion.
How many numbers of protons and electrons are there in a magnesium ion?
The number of protons is equal to the number of electrons until it becomes an ion.
“Law of constant proportion” was proposed by
The Law of constant proportion is also known as the law of definite proportion or Proust's law.
“Law of constant proportion” was proposed by
The Law of constant proportion is also known as the law of definite proportion or Proust's law.
Which branch of chemistry deals with the separation, quantitative analysis, qualitative analysis and identification of substances?
The traditional methods include flame tests, the Kastle Meyer test, etc. whereas modern methods include spectrophotometry, calorimetry, etc.
Which branch of chemistry deals with the separation, quantitative analysis, qualitative analysis and identification of substances?
The traditional methods include flame tests, the Kastle Meyer test, etc. whereas modern methods include spectrophotometry, calorimetry, etc.
Which one of the following is the limitation of Dalton's atomic theory?
Dalton's atomic theory doesn't even take into account the presence of isotopes and isobars.
Which one of the following is the limitation of Dalton's atomic theory?
Dalton's atomic theory doesn't even take into account the presence of isotopes and isobars.
If all the reactants in a reaction are completely used, which of the following statements describe the relationship between the reactants and the products?
Law of conservation of mass is valid under isolated conditions.
If all the reactants in a reaction are completely used, which of the following statements describe the relationship between the reactants and the products?
Law of conservation of mass is valid under isolated conditions.
On combustion of propane, reaction:
If 200gms of propane is burned, then how many grams of water is produced?
Number of moles are calculated as mass of substance divided by mass of one mole.
On combustion of propane, reaction:
If 200gms of propane is burned, then how many grams of water is produced?
Number of moles are calculated as mass of substance divided by mass of one mole.
If the iron reacts with hydrochloric acid to form ferrous chloride and hydrogen, then what will be the atomic mass of the product?
When hot iron reacts with chlorine gas, the product will be ferric chloride, (FeCl3 )instead of ferrous chloride.If the iron reacts with hydrochloric acid to form ferrous chloride and hydrogen, then what will be the atomic mass of the product?
If the reactant carbon is combined with reactant oxygen to form the product carbon dioxide, then what will be the atomic mass of the product?
Molecular mass is measured as an atomic mass unit or Dalton.
If the reactant carbon is combined with reactant oxygen to form the product carbon dioxide, then what will be the atomic mass of the product?
Molecular mass is measured as an atomic mass unit or Dalton.
In a chemical reaction, 200 grams of reactant A is combined with 50g of reactant B. Both A and B react to completion. How much will the total product weigh?
Since there is no quantity left in the products side, the calculation of total mass of product become easier.
In a chemical reaction, 200 grams of reactant A is combined with 50g of reactant B. Both A and B react to completion. How much will the total product weigh?
Since there is no quantity left in the products side, the calculation of total mass of product become easier.
What is 1 Dalton?
1 Dalton is also known as the unified atomic mass unit.
What is 1 Dalton?
1 Dalton is also known as the unified atomic mass unit.
Who believed all substances like air, water, earth, and fire are small amounts of matter?
Aristotle did not believe in Dalton's atomic theory.
Who believed all substances like air, water, earth, and fire are small amounts of matter?
Aristotle did not believe in Dalton's atomic theory.
Who has called the smaller particle or the piece “Atomos”?
There is no other element in this universe that is smaller than an atom.
Who has called the smaller particle or the piece “Atomos”?
There is no other element in this universe that is smaller than an atom.
