Law of Constant Proportion

Q.

Which postulate of Dalton’s atomic theory can explain the law of definite proportions?

Q.

Calculate the molecular mass of Ethane (${\mathrm{C}}_2{\mathrm{H}}_{6_{}}$).

Q.

The oxide of an element possesses the formula ${\text{M}}_{\text{2}}{\text{O}}_{\text{3}}$. If the equivalent weight of the metal is 9, then the atomic weight of the metal will be?

Q.

A ___________ is a substance made up of two or more elements.

Q.

What discovered Dalton?

Q.

Explain Daltons atomic theory.

Q. The same proportion of hydrogen and oxygen in the water obtained from different sources proves the law of:

1. electrons are universal constituents of matter
2. electrons are negatively charged
3. electrons are the lightest of all particles
4. Mass of the electrons is of the mass of H-atom

Q.

Define law of constant proportion.

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What are the key postulates of Dalton atomic theory?

Q.

Dalton's Atomic Theory was able to explain

1. Law of conservation of mass

2. Law of multiple proportion

3. Law of constant composition

4. Existence of allotropes

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What are the key postulates of Dalton atomic theory?

Q.

What would be the mass of oxygen atom on the planet Mars?

1. 16

2. 18

3. 20

4. 22

Q.

The atomic weight of a trivalent metal is $x$. Calculate its electrochemical equivalent.

1. $\frac{x}{96,500}$

2. $\frac{x}{3\times 96,500}$

3. $\frac{x}{3}$

4. $\frac{3x}{96,500}$