Law of Conservation of Matter

Q.

State the law of conservation of mass ?

Q.

Prove law of conservation of mass.

Q. A balanced chemical equation is in accordance with _________.

1. law of conservation of mass
2. law of constant proportion
3. law of multiple proportion
4. Avogadros law

Q. Which of the following equation satisfies the law of conservation of mass?

1. C + O${}_2$ → CO${}_2$
2. 2C + O${}_2$ → CO${}_2$
3. 4C + O${}_2$ → CO${}_2$
4. C + 2O${}_2$ → CO${}_2$

Q.

Chemical symbol of hydrogen is ${\mathrm{H}}_2$

1. True
2. False

Q.

A chemical equation is balanced according to the law of definite proportion.

1. True

2. False

Q.

The symbol of carbon is C, and the symbols of calcium, copper, and chlorine are

1. Ca, Cu, Cl

2. Ca, Co, Cu

3. C, Co, Cl

4. Ca, Co, Cl

Q.

According to Law of conservation of mass, mass of reactants wil be equal to the mass of:

1. Apparatus used for reaction

2. Catalysts

3. Gases Evolved

4. Products

Q. Question 2
When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combinations will govern your answer?

Q.

Explain the law of conservation of mass

Q.

B. Statement given below is incorrect. Write the correct statement.

5. The symbol of the chlorine gas is Cl.

Q. what is meant by law of conservation of mass ? explain by giving example ??

Q.

In an experiment the following reactions takes place:
$X+Y\to Z2g4gug$

$Z+A\to Bug7gcg$

What is the value of u and c respectively?

1. 7, 4

2. 4, 7

3. 6, 13

4. 13, 6

Q. 5 g of X reacts with 6 g of Y to form a new product Z.
$X+Y\to \mathrm{Z.}$The mass of the product Z formed is g.

1. 13
2. 11
3. 6

Q. Which of the following chemical equation satisfies the law of conservation of mass?

1. $C+O_2\to C{O}_2$
2. $2C+O_2\to C{O}_2$
3. $4C+O_2\to C{O}_2$
4. $C+2O_2\to C{O}_2$

Q. Identify the example of an element from the following options.

1. ${\text{H}}_2\text{S}$
2. ${\text{O}}_2$
3. ${\text{CH}}_4$
4. ${\text{NH}}_3$

Q. Statement 1: An iron rod contains only iron atoms in it.

Statement 2: A glass of water contains only oxygen atoms in it.

1. Statement 1 is true, statement 2 is false
2. Statement 2 is true, statement 1 is false
3. Both statements are true
4. Both statements are false

Q.

Amount or quantity of matter of an object is called its______.

Q.

when iron is heated with sulphur, iron sulphide is formed.The total mass of iron and sulphur is equal to the mass of iron sulphide.why?

Q. 5 g of X reacts with 6 g of Y to form a new product Z.
$X+Y\to \mathrm{Z.}$The mass of the product Z formed is g.

1. 13
2. 11
3. 6

Q. 5 g of X reacts with 6 g of Y to form a new product Z.
$X+Y\to \mathrm{Z.}$The mass of the product Z formed is g.

1. 13
2. 6
3. 11

Q. 5 g of X reacts with 6 g of Y to form a new product Z.
$X+Y\to \mathrm{Z.}$The mass of the product Z formed is g.

1. 13
2. 11
3. 6

Q. A balanced chemical equation is in accordance with _________.

1. Avogadro's law
2. law of conservation of mass
3. law of constant proportion
4. law of multiple proportion

Q. Pure substances are classified as:

1. elements and compounds
2. elements and mixtures
3. compounds and mixtures
4. molecules and mixtures

Q. Balancing of a chemical equation is based on which of the following laws?

1. Law of multiple proportions
2. Law of constant proportions
3. Avogadro's law
4. Law of conservation of mass

Q. A balanced chemical equation is in accordance with _________.

1. Avogadros law
2. law of conservation of mass
3. law of constant proportion
4. law of multiple proportion

Q.

According to law of conservation of mass, during a chemical reaction:

1. matter can be created but not destroyed in a chemical reaction.

2. matter can neither be created nor be destroyed in a chemical reaction.

3. matter cannot be created but can be destroyed in a chemical reaction.

4. matter can be created as well as destroyed in a chemical reaction.